lister.co.id

lister.co.id is SSL secured

Free website and domain report on lister.co.id

Last Updated: 13th May, 2020 Update Now
Overview

Snoop Summary for lister.co.id

This is a free and comprehensive report about lister.co.id. The domain lister.co.id is currently hosted on a server located in Indonesia with the IP address 101.50.1.37, where IDR is the local currency and the local language is Indonesian. If lister.co.id was to be sold it would possibly be worth $131 USD (based on the daily revenue potential of the website over a 24 month period). Lister.co.id receives an estimated 58 unique visitors every day - a small amount of traffic. This report was last updated 13th May, 2020.

About lister.co.id

Site Preview: lister.co.id lister.co.id
Title: LISTER Kursus Bahasa Asing Online | Learn With Experts
Description: LISTER.co.id - LISTER Kursus Bahasa Asing Online | Learn With Experts , Kursus IELTS Online , Spesialis Kursus Persiapan IELTS Secara Online
Keywords and Tags:
Related Terms: idp ielts, ielts course, ielts listening, ielts listening preparation, ielts online course, ielts preparation, ielts reading, ielts speaking, kursus eperolehan, online experts
Fav Icon:
Age: Over 4 years old
Domain Created: 21st October, 2019
Domain Updated: 26th October, 2019
Domain Expires: 21st October, 2020
Review

Snoop Score

1/5

Valuation

$131 USD
Note: All valuation figures are estimates.

Popularity

Low
Note: Popularity is estimated.

Rank, Reach and Authority

Alexa Rank: 8,965,119
Alexa Reach: <0.0001%
SEMrush Rank (US):
SEMrush Authority Score:
Moz Domain Authority: 0
Moz Page Authority: 0

Organic vs Paid (Google Ads)

Traffic

Visitors

Daily Visitors: 58
Monthly Visitors: 1,765
Yearly Visitors: 21,170
Note: All visitors figures are estimates.

Visitors By Country

Revenue

Revenue

Daily Revenue: $0 USD
Monthly Revenue: $5 USD
Yearly Revenue: $60 USD
Note: All revenue figures are estimates.

Revenue By Country

SEO

Backlinks Analysis (SEMrush)

Top New Follow Links

Top Ranking Keywords (US)

Domain Analysis

Value Length
Domain: lister.co.id 12
Domain Name: lister 6
Extension (TLD): coid 4
Expiry Check:

Page Speed Analysis

Average Load Time:
Load Time Comparison:

PageSpeed Insights

Avg. (All Categories) 76
Performance 75
Accessibility 97
Best Practices 69
SEO 91
Progressive Web App 50
0–49 (Fail) 50–89 (Average) 90–100 (Pass)
Simulate loading on desktop
75

Performance

Indicates how well the page is performing and highlights opportunities where performance may be improved for lister.co.id. This includes details about optimizing page load times which can result in a better user experience.

Metrics

First Contentful Paint — 0.6 s
The time taken for the first image or text on the page to be rendered.
First Meaningful Paint — 0.7 s
The time taken for the primary content of the page to be rendered.
Time to Interactive — 1.1 s
The time taken for the page to become fully interactive.
First CPU Idle — 1.0 s
The time taken for the page's main thread to be quiet enough to handle input.

Other

Estimated Input Latency — 10 ms
The time taken for the page to respond to user input (during the busiest 5 second window of page load). Users are likely to perceive lister.co.id as laggy when the latency is higher than 0.05 seconds.
Total Blocking Time — 60 ms
The total blocking time is the sum of all time periods between First Contentful Paint and Time to Interactive (when task length exceeded 50ms).
Network Requests
Below is a list of network requests that were made during page load.
URL Start Time (Ms) End Time (Ms) Transfer Size (Bytes) Resource Size (Bytes) Status Code MIME Type Resource Type
http://lister.co.id/
0
1428.5969999619
305
0
301
text/html
https://lister.co.id/
1428.9629999548
2738.5680000298
32742
303687
200
text/html
Document
https://lister.co.id/wp-content/cache/wpfc-minified/erozwolg/67aef.css
2749.6500001289
4719.9639999308
46495
301920
200
text/css
Stylesheet
https://www.google-analytics.com/analytics.js
2749.8610001057
2754.7630001791
19102
45892
200
text/javascript
Script
https://lister.co.id/wp-content/plugins/autoptimize/classes/external/js/lazysizes.min.js?ao_version=2.7.1
2760.0970002823
3011.4259999245
4234
8938
200
application/javascript
Script
https://lister.co.id/wp-includes/js/jquery/jquery.js
2760.5340001173
3322.5699998438
33271
96873
200
application/javascript
Script
https://lister.co.id/wp-content/cache/autoptimize/js/autoptimize_65a9c6ba3261e4f88f12317211f43ca4.js
2760.9569998458
4963.8970000669
102860
412956
200
application/javascript
Script
4748.6780001782
4748.7160000019
0
68
200
image/svg+xml
Image
4749.8880000785
4749.9310001731
0
67
200
image/svg+xml
Image
4751.0620001704
4751.0990002193
0
69
200
image/svg+xml
Image
4752.1130000241
4752.1399999969
0
66
200
image/svg+xml
Image
4753.1810002401
4753.2080002129
0
66
200
image/svg+xml
Image
4754.1320002638
4754.1590002365
0
68
200
image/svg+xml
Image
4755.1350002177
4755.1669999957
0
68
200
image/svg+xml
Image
4756.0370001011
4756.0649998486
0
68
200
image/svg+xml
Image
4756.982000079
4757.0150000975
0
68
200
image/svg+xml
Image
4757.9120001756
4757.9649998806
0
68
200
image/svg+xml
Image
4759.2310002074
4759.2700002715
0
68
200
image/svg+xml
Image
4760.2820000611
4760.3549999185
0
66
200
image/svg+xml
Image
https://www.google-analytics.com/plugins/ua/ec.js
4766.7900002562
4769.9799998663
1943
2779
200
text/javascript
Script
https://www.google-analytics.com/plugins/ua/linkid.js
4767.6019999199
4773.6130002886
1468
1569
200
text/javascript
Script
https://lister.co.id/wp-content/uploads/2020/04/wave-2.png
4778.0329999514
5028.0630001798
19888
19541
200
image/png
Image
https://lister.co.id/wp-content/plugins/elementor/assets/lib/font-awesome/webfonts/fa-solid-900.woff2
4792.09800018
5531.0130002908
75800
75440
200
application/font-woff2
Font
https://lister.co.id/wp-content/plugins/elementor/assets/lib/font-awesome/webfonts/fa-regular-400.woff2
4792.4350001849
6040.2400000021
13940
13580
200
application/font-woff2
Font
https://lister.co.id/wp-content/plugins/elementor/assets/lib/font-awesome/webfonts/fa-brands-400.woff2
4797.8870002553
6279.752000235
74868
74508
200
application/font-woff2
Font
https://lister.co.id/wp-content/uploads/2020/04/121.png
4929.7489998862
5941.3709999062
11072
10725
200
image/png
Image
https://lister.co.id/wp-content/uploads/2020/04/Hero-Image-2.png
4929.9369999208
6673.6360001378
109871
109523
200
image/png
Image
https://www.google-analytics.com/collect?v=1&_v=j82&aip=1&a=198288132&t=pageview&_s=1&dl=https%3A%2F%2Flister.co.id%2F&ul=en-us&de=UTF-8&dt=LISTER%20Kursus%20Bahasa%20Asing%20Online%20%7C%20Learn%20With%20Experts&sd=24-bit&sr=800x600&vp=1350x940&je=0&_u=aGBAgEIr~&jid=1074755373&gjid=534260742&cid=1260561750.1589352910&tid=UA-163739051-1&_gid=1090554527.1589352910&_av=2.4.0&_au=20&did=i5iSjo&z=385270686
5048.4080002643
5051.338000223
617
35
200
image/gif
Image
https://stats.g.doubleclick.net/r/collect?t=dc&aip=1&_r=3&v=1&_v=j82&tid=UA-163739051-1&cid=1260561750.1589352910&jid=1074755373&gjid=534260742&_gid=1090554527.1589352910&_u=aGBAgEIr~&z=22104765
5048.8990000449
5052.6800001971
676
35
200
image/gif
Image
https://lister.co.id/wp-content/plugins/elementor/assets/lib/eicons/fonts/eicons.woff2?5.5.0
5140.3260002844
5637.2950002551
73076
72716
200
application/font-woff2
Font
https://lister.co.id/wp-content/plugins/wp-youtube-lyte/lyteThumbs.php?origThumbUrl=%2F%2Fi.ytimg.com%2Fvi%2FPuzdURNQSYc%2Fhqdefault.jpg
6678.8409999572
6936.7479998618
9151
8792
200
image/jpeg
Image
https://lister.co.id/wp-content/plugins/wp-youtube-lyte/lyte/lytesprite.png
6679.3240001425
6932.9570000991
5185
4839
200
image/png
Image
https://lister.co.id/wp-content/uploads/2020/04/hand.png
6767.7700002678
7019.0440001898
1726
1380
200
image/png
Image
https://lister.co.id/wp-content/uploads/2020/04/blueprint.png
6900.2249999903
7151.8120002002
2013
1667
200
image/png
Image
Network Round Trip Times — 0 ms
High Network RTT (Round Trip Times) can have a large impact on performance. Providing servers geographically closer to the user could improve performance.
Server Backend Latencies — 0 ms
High server latencies indicate the server is overloaded or has a poor backend performance.
Tasks
Below is a list of the top-level main thread tasks that executed during page load.
Start Time (Ms) End Time (Ms)
2759.363
6.175
4739.855
12.024
4751.923
27.989
4780.02
116.221
4896.362
9.616
4906.087
23.125
4942.872
5.863
4999.54
291.796
5291.509
10.15
5318.164
15.82
5550.486
6.957
5557.472
71.708
5632.173
7.535
5658.239
6.308
5669.09
68.431
5967.225
6.097
6067.214
62.099
6303.669
68.89
6583.88
6.683
6693.502
8.823
6702.341
8.509
7033.882
8.047
Diagnostics
Below is a collection of useful page vitals.
View Data
Metrics
Below is a collection of metrics.
View Data

Opportunities

Eliminate render-blocking resources — Potential savings of 70 ms
Resources, such as JavaScript and style sheets, can block the first paint of the page. Lister.co.id should consider delivering critical JavaScript/style sheets (JS/CSS) inline and deferring all non-critical JS/CSS.
URL Size (Bytes) Potential Savings (Ms)
https://lister.co.id/wp-content/cache/wpfc-minified/erozwolg/67aef.css
46495
110
Properly size images — Potential savings of 60 KB
Images can slow down the page's load time. Lister.co.id should consider serving more appropriate-sized images.
URL Size (Bytes) Potential Savings (Bytes)
https://lister.co.id/wp-content/uploads/2020/04/Hero-Image-2.png
109523
61613
Defer offscreen images
Time to Interactive can be slowed down by resources on the page. Lister.co.id should consider lazy-loading offscreen and hidden images.
Minify CSS
Cascading Style Sheets (CSS) files can contribute to network payload sizes. Lister.co.id should consider minifying CSS files.
Minify JavaScript
JavaScript (JS) files can contribute to network payload sizes and increase script parse times. Lister.co.id should consider minifying JS files.
Remove unused CSS — Potential savings of 43 KB
Dead and/or unused rules in Style Sheets (CSS) can contribute to network payload sizes. Lister.co.id should consider removing dead rules from style sheets and deferring the loading of CSS not used for above-the-fold content.
URL Size (Bytes) Potential Savings (Bytes)
https://lister.co.id/wp-content/cache/wpfc-minified/erozwolg/67aef.css
46495
43842
Efficiently encode images
Unoptimized images can consume more cellular data than what is necessary.
Serve images in next-gen formats — Potential savings of 73 KB
Image formats like PNG and JPEG have poor compression when compared to other next-gen formats, such as JPEG 200, JPEG XR and WebP.
URL Size (Bytes) Potential Savings (Bytes)
https://lister.co.id/wp-content/uploads/2020/04/Hero-Image-2.png
109523
75011
Enable text compression
Text-based resources should be served with compression, such as gzip, deflate or brotli.
Preconnect to required origins
Resource hints, such as 'preconnect' or 'dns-prefetch', may assist in establishing early connections to important third-party origins.
Avoid multiple page redirects — Potential savings of 190 ms
Redirects can cause additional delays before the page can begin loading. Lister.co.id should avoid multiple or unnecessary page redirects.
URL Time Spent (Ms)
(Start) http://lister.co.id/
0
https://lister.co.id/
190
Preload key requests
Key requests can be preloaded by using '<link rel=preload>'. Lister.co.id should consider using '<link rel=preload>' to prioritize fetching resources that are currently requested later in page load.
Use video formats for animated content
Large GIFs are inefficient for delivering animated content. It is recommended to use MPEG4/WebM videos for animations and PNG/WebP for static images instead of GIF.

Diagnostics

Avoids enormous network payloads — Total size was 625 KB
Large network payloads can cost users money and are linked to long load times.
URL Size (Bytes)
https://lister.co.id/wp-content/uploads/2020/04/Hero-Image-2.png
109871
https://lister.co.id/wp-content/cache/autoptimize/js/autoptimize_65a9c6ba3261e4f88f12317211f43ca4.js
102860
https://lister.co.id/wp-content/plugins/elementor/assets/lib/font-awesome/webfonts/fa-solid-900.woff2
75800
https://lister.co.id/wp-content/plugins/elementor/assets/lib/font-awesome/webfonts/fa-brands-400.woff2
74868
https://lister.co.id/wp-content/plugins/elementor/assets/lib/eicons/fonts/eicons.woff2?5.5.0
73076
https://lister.co.id/wp-content/cache/wpfc-minified/erozwolg/67aef.css
46495
https://lister.co.id/wp-includes/js/jquery/jquery.js
33271
https://lister.co.id/
32742
https://lister.co.id/wp-content/uploads/2020/04/wave-2.png
19888
https://www.google-analytics.com/analytics.js
19102
Uses efficient cache policy on static assets — 4 resources found
Lister.co.id can speed up repeat visits by increasing the cache lifetime, which is essentially how long before a cached copy expires.
URL Cache TTL (Ms) Size (Bytes)
https://www.google-analytics.com/plugins/ua/ec.js
3600000
1943
https://www.google-analytics.com/plugins/ua/linkid.js
3600000
1468
https://www.google-analytics.com/analytics.js
7200000
19102
https://lister.co.id/wp-content/plugins/wp-youtube-lyte/lyteThumbs.php?origThumbUrl=%2F%2Fi.ytimg.com%2Fvi%2FPuzdURNQSYc%2Fhqdefault.jpg
604800000
9151
Avoid chaining critical requests — 2 chains found
Below is a list of Critical Request Chains, which shows which resources are loaded with a high priority. Lister.co.id should consider reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load.
User Timing marks and measures
Make use of the User Timing API to measure an app's real-world performance during key user experiences.
JavaScript execution time — 0.3 s
JavaScript (JS) execution time can be lowered by reducing the time required for parsing, compiling and executing JS. Delivering smaller JS payloads may help with this.
URL Total CPU Time (Ms) Script Evaluation (Ms) Script Parse (Ms)
Other
599.913
24.796
0.742
https://lister.co.id/wp-includes/js/jquery/jquery.js
245.695
200.407
1.819
https://www.google-analytics.com/analytics.js
115.618
18.397
1.212
https://lister.co.id/wp-content/cache/autoptimize/js/autoptimize_65a9c6ba3261e4f88f12317211f43ca4.js
73.443
60.571
6.796
Minimizes main-thread work — 1.1 s
Main-thread work timing can be lowered by reducing the time required for parsing, compiling and executing JS. Delivering smaller JS payloads may help with this.
Category Time Spent (Ms)
Style & Layout
406.65
Script Evaluation
333.099
Rendering
177.333
Other
109.593
Parse HTML & CSS
26.937
Script Parsing & Compilation
13.175
Garbage Collection
3.63
Keep request counts low and transfer sizes small — 34 requests • 625 KB
It is advised to add a budgets.json file in order to set budgets for the quantity and size of page resources.
Resource Type Requests Transfer Size (Bytes)
Total
34
640303
Font
4
237684
Script
6
162878
Image
21
160199
Stylesheet
1
46495
Document
1
32742
Other
1
305
Media
0
0
Third-party
17
23806
Minimize third-party usage — Third-party code blocked the main thread for 20 ms
It is advised to either limit, remove or delay the loading of redundant third-party code which may be significantly impacting load performance.
Third-Party Size (Bytes) Main-Thread Blocking Time (Ms)
23130
17.654
676
0

Budgets

Performance budget
It is advised to keep the quantity and size of all network requests under the targets set by the provided performance budget.

Metrics

Max Potential First Input Delay — 150 ms
Users could experience a delay when interacting with the page.

Metrics

Speed Index — 4.2 s
The time taken for the page contents to be visibly populated.

Opportunities

Reduce server response times (TTFB) — Root document took 1,310 ms
Time to First Byte (TTFB) identifies the time at which the server sends a response.

Diagnostics

Avoid an excessive DOM size — 1,711 elements
A large DOM (Document Object Model) will increase memory usage, cause longer system calculations as well as costly layout reflows.
Statistic Element Value
Total DOM Elements
1,711
Maximum DOM Depth
32
Maximum Child Elements
33
Ensure text remains visible during webfont load
Make use of the font-display CSS feature, which will ensure text is user-visible while webfonts are loading.
URL Potential Savings (Ms)
https://lister.co.id/wp-content/plugins/elementor/assets/lib/font-awesome/webfonts/fa-solid-900.woff2
738.91500011086
https://lister.co.id/wp-content/plugins/elementor/assets/lib/font-awesome/webfonts/fa-regular-400.woff2
1247.8049998172
https://lister.co.id/wp-content/plugins/elementor/assets/lib/font-awesome/webfonts/fa-brands-400.woff2
1481.8649999797
https://lister.co.id/wp-content/plugins/elementor/assets/lib/eicons/fonts/eicons.woff2?5.5.0
496.9689999707
97

Accessibility

Indicates how accessible the page is and highlights opportunities where the page can be made more accessible to users of lister.co.id. This includes details about various page attributes that can be optimized.

Navigation

`[accesskey]` values are unique
Access keys assist users with focusing on different parts of the page. Each access key should be unique for proper navigation.
The page contains a heading, skip link, or landmark region
It is advised to provide ways to bypass repetitive content, allowing users to navigate the page efficiently.
No element has a `[tabindex]` value greater than 0
Although technically valid, a tabindex value greater than 0 often creates frustrating experiences for users who rely on assistive technologies.

ARIA

`[aria-*]` attributes match their roles
Avoid mismatching 'aria-*' attributes and their 'role' value, as it invalidates the attribute.
`[role]`s have all required `[aria-*]` attributes
Some ARIA roles have required 'aria-*' attributes, which provide essential information about state and functionality.
Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.
Some ARIA parent roles cannot perform their intended functions if specific child roles are not used.
`[role]`s are contained by their required parent element
Some ARIA child roles cannot perform their intended functions if specific parent roles are not used.
`[role]` values are valid
All ARIA roles require valid values to perform their intended functions.
`[aria-*]` attributes have valid values
ARIA attributes cannot be interpreted with invalid values when used by screen readers and other assistive technologies.
`[aria-*]` attributes are valid and not misspelled
ARIA attributes cannot be interpreted with invalid names when used by screen readers and other assistive technologies.

Audio and video

`<audio>` elements contain a `<track>` element with `[kind="captions"]`
Lister.co.id may provide assistance to deaf or hearing-impaired users with captions on audio elements.
`<video>` elements contain a `<track>` element with `[kind="captions"]`
Lister.co.id may provide assistance to deaf or hearing-impaired users with captions on videos.
`<video>` elements contain a `<track>` element with `[kind="description"]`
Lister.co.id may provide relevant information that dialogue cannot, by using audio descriptions.

Names and labels

Buttons have an accessible name
Buttons become unusable as they are announced simply as "button" when the button does not have an accessible name, when used by screen readers and other assistive technologies.
Document has a `<title>` element
Search engines, screen reader users and other assistive technology users rely on the title to provide an overview of the page and to help determine if the page is relevant to their search.
`<frame>` or `<iframe>` elements have a title
Screen reader users and other assistive technology users rely on frame titles to describe the contents of frames.
Image elements have `[alt]` attributes
Provide short and descriptive alternative text where possible on informative elements.
`<input type="image">` elements have `[alt]` text
Input buttons with alternative text assist screen readers and other assistive technology users to understand its purpose.
Form elements have associated labels
Screen readers and other assistive technologies rely on labels to properly announce form controls.
Links have a discernible name
In order to improve the navigation for screen reader and other assistive technology users, use link text that is unique, focusable and discernible.
`<object>` elements have `[alt]` text
It is advised that alt text is used on '<object>' elements in order to provide meaning to screen reader and other assistive technology users, as these technologies are unable to translate non-text content.

Tables and lists

`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>` or `<template>` elements.
Screen readers and other assistive technologies may produce poor and inaccurate output when definition lists are not properly marked up.
Definition list items are wrapped in `<dl>` elements
In order for screen readers and other assistive technologies to properly announce definition list items ('<dt>' and '<dd>'), they must be wrapped in parent a '<dl>' element.
Presentational `<table>` elements avoid using `<th>`, `<caption>` or the `[summary]` attribute.
It is advised to not include data elements in tables which are used for layout purposes, as it may create confusion for screen reader and other assistive technology users.
Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
Use proper list structure to aid screen readers and other assistive technologies.
List items (`<li>`) are contained within `<ul>` or `<ol>` parent elements
In order for screen readers to announce list items, ensure that list items ('<li>') are contained within parent '<ul>' or '<ol>' tags.
Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.
Screen readers and other assistive technologies have features to make navigating tables easier. Ensure that '<td>' cells using the headers attribute only refer to other cells in the same table, to improve screen reader user experience.
`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.
Screen readers and other assistive technologies have features to make navigating tables easier. Ensure that table headers refer to some set of cells, to improve screen reader user experience.

Internationalization and localization

`<html>` element has a `[lang]` attribute
It is advised to provide a lang attribute so that screen readers and other assistive technologies are guaranteed to announce the page's text correctly. When not provided, the user's default language setting will be used which may cause inaccuracies.
`<html>` element has a valid value for its `[lang]` attribute
Specify a valid BCP 47 language in order to help screen readers and other assistive technologies announce text properly.
`[lang]` attributes have a valid value
Specify a valid BCP 47 language on elements in order to help screen readers and other assistive technologies announce text properly.

Best practices

The document does not use `<meta http-equiv="refresh">`
Pages that refresh automatically cause a poor user experience as focus is directed back to the top of the page unexpectedly.
`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
For users with low vision who rely on screen magnification, ensure that zooming is not disabled.

Contrast

Background and foreground colors do not have a sufficient contrast ratio.
Many (if not most) users find low-contrast text difficult or impossible to read.
Failing Elements

Best practices

`[id]` attributes on the page are not unique
It is advised to keep all id attributes unique in order to prevent instances from being overlooked by screen readers and other assistive technologies.
Failing Elements
svg
svg

Manual Checks

The page has a logical tab order
The visual layout should be logical in its tab order and users cannot focus elements that are offscreen.
Interactive controls are keyboard focusable
Ensure that custom interactive controls are keyboard focusable and that a focus indicator is displayed.
Interactive elements indicate their purpose and state
Ensure that interactive elements (such as links and buttons) are distinguishable from non-interactive elements and that they indicate their state.
The user's focus is directed to new content added to the page
When new content (such as a dialogue) is added to the page, the user's focus should be directed to it.
User focus is not accidentally trapped in a region
Avoid focus being accidentally trapped when a user tabs in and out of controls or regions on page.
Custom controls have associated labels
Ensure that custom interactive controls have associated labels, which are provided by aria-label and aria-labelledby attributes.
Custom controls have ARIA roles
Ensure that all custom interactive controls have appropriate ARIA roles.
Visual order on the page follows DOM order
Ensure that the DOM order matches with the page's visual order, in order to improve navigation for screen readers and other assistive technologies.
Offscreen content is hidden from assistive technology
Ensure that offscreen content is hidden through the use of "display:none" styling or the aria-hidden attribute.
Headings don't skip levels
Ensure that headings create an outline for the page and that heading levels are not skipped.
HTML5 landmark elements are used to improve navigation
Elements such as <main> and <nav> are recommended as they are used by screen readers and other assistive technologies to improve keyboard navigation.
69

Best Practices

Indicates the recommended, best practices currently in place on the page and highlights the best practices that lister.co.id should incorporate. This includes practices such as protecting pages with HTTPS.

Other

Avoids Application Cache
Application cache is deprecated and is no longer recommended.
Avoids `document.write()`
Avoid or limit the use of external scripts that are dynamically injected via 'document.write()' as users on slow connections will be delayed by tens of seconds.
Avoids requesting the geolocation permission on page load
When requesting a user's location, provide context or consider tying the request to a user action to avoid confusion and mistrust from users.
Page has the HTML doctype
Ensure a doctype is specified to prevent the browser from switching to quirks-mode.
Detected JavaScript libraries
Below is a list of all front-end JavaScript libraries that were detected on the page.
Name Version
jQuery
1.12.4
jQuery (Fast path)
jQuery UI
WordPress
Avoids requesting the notification permission on page load
When requesting permission to send notifications, provide context or consider tying the request to a user action to avoid confusion and mistrust from users.
Avoids deprecated APIs
Avoid deprecated APIs which will eventually be removed the browser.
Allows users to paste into password fields
Ensure that password inputs may be pasted into to aid in the user's ability to use password managers and improve security.
No browser errors logged to the console
Below is a list of all errors logged to the console, which indicate unresolved problems on the site.
Displays images with correct aspect ratio
Ensure that image display dimensions match their natural aspect ratio.

Other

Does not use HTTPS — 1 insecure request found
Ensure that all pages are protected with HTTPS (including those that do not handle sensitive data) as HTTPS prevents tampering and passive listening on communications between the app and its users. Additionally, HTTPS is a prerequisite for HTTP/2 and many new web platform APIs.
Insecure URL
http://lister.co.id/
Does not use passive listeners to improve scrolling performance
Improve the page's scroll performance by marking touch and wheel event listeners as 'passive'.
URL Location
https://lister.co.id/wp-includes/js/jquery/jquery.js
line: 2
Links to cross-origin destinations are unsafe
Improve performance and prevent security vulnerabilities by adding rel="noopener" and rel="noreferrer" to external links.
Includes front-end JavaScript libraries with known security vulnerabilities — 2 vulnerabilities detected
Ensure that the use of third-party scripts is minimal and that only trusted third-party scripts are used as some may contain known security vulnerabilities which may be exploited by attackers.
Library Version Vulnerability Count Highest Severity
2
Medium
91

SEO

Indicates how well the page is optimized for ranking in search engines and highlights Search Engine Optimization (SEO) opportunities for lister.co.id. This includes optimizations such as providing meta data.

Mobile Friendly

Has a `<meta name="viewport">` tag with `width` or `initial-scale`
It is advised to use a '<meta name="viewport">' tag for the optimization of lister.co.id on mobile screens.
Document uses legible font sizes
Font sizes of 12px or less are too small to most mobile users without user gestures and further action. Aim for more than 60% of page text to use font sizes greater than 12px.
Tap targets are sized appropriately
Interactive elements (such as buttons and links) should be appropriately spaced, sized and easy enough to select or tap with regard to their surrounding elements.

Content Best Practices

Document has a `<title>` element
Search engines, screen reader users and other assistive technology users rely on the title to provide an overview of the page and to help determine if the page is relevant to their search.
Document has a meta description
Meta descriptions may be used by search engines when displaying a link to the page and should concisely summarize the page's content.
Image elements have `[alt]` attributes
Provide short and descriptive alternative text where possible on informative elements.
Document has a valid `hreflang`
Search engines can be instructed to list specific versions of a page for a given language or region through the use of hreflang links.
Document has a valid `rel=canonical`
Search engines can be suggested which URL should be shown in search results through the use of canonical links.
Document avoids plugins
The content of plugins cannot be indexed by search engines and many devices either restrict or do not support them.

Crawling and Indexing

Page has successful HTTP status code
Avoid pages with unsuccessful HTTP status codes as they may not be indexed by search engines.
Page isn’t blocked from indexing
Pages that cannot be crawled by search engines cannot be indexed or included in their search results. Ensure that search engines have permission to crawl all pages that should be indexed.
robots.txt is valid
Malformed robots.txt files prevent crawlers from understanding how a site wants to be crawled or indexed, which can be devastating to SEO.

Content Best Practices

Links do not have descriptive text — 27 links found
Make use of descriptive link text to assist search engines in understanding the content.

Manual Checks

Structured data is valid
Structured data can be validated through the use of the Structured Data Testing Tool and the Structured Data Linter.
50

Progressive Web App

Indicates how valid the aspects of a Progressive Web App (PWA) are for the page and highlights opportunities to enable/improve the PWA of lister.co.id. This includes details about web app manifests.

Fast and reliable

Page load is fast enough on mobile networks
Ensure that the page loads fast enough over a cellular network, to ensure good mobile user experience.

PWA Optimized

Redirects HTTP traffic to HTTPS
It is advised to redirect all HTTP traffic to HTTPS, in order to enable secure web features for all users.
Content is sized correctly for the viewport
Ensure that the width of the app's content matches the width of the viewport, otherwise the app might not be optimized for mobile screens.
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
It is advised to use a '<meta name="viewport">' tag for the optimization of lister.co.id on mobile screens.
Contains some content when JavaScript is not available
Apps should display alternative content for when JavaScript is disabled.
Provides a valid `apple-touch-icon`
iOS users of Progressive Web Apps will benefit from an apple touch icon, which can be defined with 'apple-touch-icon', which must point to a non-transparent 192px (or 180px) square PNG.

Fast and reliable

Current page does not respond with a 200 when offline
In order for Progressive Web Apps to be made available offline, ensure that the app is using a service worker.
`start_url` does not respond with a 200 when offline
Consider using a service worker for Progressive Web Apps to ensure greater reliability for the user, in the case of poor network conditions.

Installable

Does not use HTTPS — 1 insecure request found
Ensure that all pages are protected with HTTPS (including those that do not handle sensitive data) as HTTPS prevents tampering and passive listening on communications between the app and its users. Additionally, HTTPS is a prerequisite for HTTP/2 and many new web platform APIs.
Insecure URL
http://lister.co.id/
Does not register a service worker that controls page and `start_url`
A service worker is used to provide Progressive Web Apps the use of features such as working offline, the ability for the app to be added to the homescreen as well as push notifications.
Web app manifest does not meet the installability requirements
User engagement may be increased by leveraging the browsers ability to proactively prompt users to add the app to their homescreen.
View Data

PWA Optimized

Is not configured for a custom splash screen
Themed splash screens ensure a high-quality user experience at launch for app users.
View Data
Does not set a theme color for the address bar.
A theme may be applied to the browser address bar, which ideally can be made to match the site.
View Data

Manual Checks

Site works cross-browser
Ensure that the Progressive Web App works correctly across every major browser.
Page transitions don't feel like they block on the network
Users perceive apps with responsive, snappy transitions as higher peforming and ensures a great user experience, even on a slow network.
Each page has a URL
Ensure that all pages are deep linkable via URL. They should also be unique for the purpose of shareability on social media.
Avg. (All Categories) 76
Performance 74
Accessibility 97
Best Practices 69
SEO 90
Progressive Web App 52
0–49 (Fail) 50–89 (Average) 90–100 (Pass)
Simulate loading on mobile
74

Performance

Indicates how well the page is performing and highlights opportunities where performance may be improved for lister.co.id. This includes details about optimizing page load times which can result in a better user experience.

Metrics

First Contentful Paint — 1.7 s
The time taken for the first image or text on the page to be rendered.
First Meaningful Paint — 2.1 s
The time taken for the primary content of the page to be rendered.

Opportunities

Defer offscreen images
Time to Interactive can be slowed down by resources on the page. Lister.co.id should consider lazy-loading offscreen and hidden images.
Minify CSS
Cascading Style Sheets (CSS) files can contribute to network payload sizes. Lister.co.id should consider minifying CSS files.
Minify JavaScript
JavaScript (JS) files can contribute to network payload sizes and increase script parse times. Lister.co.id should consider minifying JS files.
Efficiently encode images
Unoptimized images can consume more cellular data than what is necessary.
Enable text compression
Text-based resources should be served with compression, such as gzip, deflate or brotli.
Preconnect to required origins
Resource hints, such as 'preconnect' or 'dns-prefetch', may assist in establishing early connections to important third-party origins.
Server response times are low (TTFB) — Root document took 510 ms
Time to First Byte (TTFB) identifies the time at which the server sends a response.
Avoid multiple page redirects — Potential savings of 630 ms
Redirects can cause additional delays before the page can begin loading. Lister.co.id should avoid multiple or unnecessary page redirects.
URL Time Spent (Ms)
(Start) http://lister.co.id/
0
https://lister.co.id/
630
Use video formats for animated content
Large GIFs are inefficient for delivering animated content. It is recommended to use MPEG4/WebM videos for animations and PNG/WebP for static images instead of GIF.

Diagnostics

Avoids enormous network payloads — Total size was 622 KB
Large network payloads can cost users money and are linked to long load times.
URL Size (Bytes)
https://lister.co.id/wp-content/uploads/2020/04/Hero-Image-2.png
109871
https://lister.co.id/wp-content/cache/autoptimize/js/autoptimize_65a9c6ba3261e4f88f12317211f43ca4.js
102860
https://lister.co.id/wp-content/plugins/elementor/assets/lib/font-awesome/webfonts/fa-solid-900.woff2
75800
https://lister.co.id/wp-content/plugins/elementor/assets/lib/font-awesome/webfonts/fa-brands-400.woff2
74868
https://lister.co.id/wp-content/plugins/elementor/assets/lib/eicons/fonts/eicons.woff2?5.5.0
73076
https://lister.co.id/wp-content/cache/wpfc-minified/erozwolg/67aef.css
46495
https://lister.co.id/wp-includes/js/jquery/jquery.js
33271
https://lister.co.id/
32742
https://lister.co.id/wp-content/uploads/2020/04/wave-2.png
19888
https://www.google-analytics.com/analytics.js
19076
Uses efficient cache policy on static assets — 4 resources found
Lister.co.id can speed up repeat visits by increasing the cache lifetime, which is essentially how long before a cached copy expires.
URL Cache TTL (Ms) Size (Bytes)
https://www.google-analytics.com/plugins/ua/ec.js
3600000
1943
https://www.google-analytics.com/plugins/ua/linkid.js
3600000
1495
https://www.google-analytics.com/analytics.js
7200000
19076
https://lister.co.id/wp-content/plugins/wp-youtube-lyte/lyteThumbs.php?origThumbUrl=%2F%2Fi.ytimg.com%2Fvi%2FPuzdURNQSYc%2Fhqdefault.jpg
604800000
9151
Avoid chaining critical requests — 2 chains found
Below is a list of Critical Request Chains, which shows which resources are loaded with a high priority. Lister.co.id should consider reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load.
User Timing marks and measures
Make use of the User Timing API to measure an app's real-world performance during key user experiences.
JavaScript execution time — 1.1 s
JavaScript (JS) execution time can be lowered by reducing the time required for parsing, compiling and executing JS. Delivering smaller JS payloads may help with this.
URL Total CPU Time (Ms) Script Evaluation (Ms) Script Parse (Ms)
Other
2040.884
72.456
3.22
https://lister.co.id/wp-includes/js/jquery/jquery.js
789.592
646.828
6.624
https://www.google-analytics.com/analytics.js
379.192
63.7
4.924
https://lister.co.id/wp-content/cache/autoptimize/js/autoptimize_65a9c6ba3261e4f88f12317211f43ca4.js
246.6
203.768
27.388
https://lister.co.id/wp-content/plugins/autoptimize/classes/external/js/lazysizes.min.js?ao_version=2.7.1
75.268
71.956
3.312
Keep request counts low and transfer sizes small — 32 requests • 622 KB
It is advised to add a budgets.json file in order to set budgets for the quantity and size of page resources.
Resource Type Requests Transfer Size (Bytes)
Total
32
636552
Font
4
237684
Script
6
162879
Image
19
156460
Stylesheet
1
46495
Document
1
32742
Other
1
292
Media
0
0
Third-party
17
23807
Minimize third-party usage — Third-party code blocked the main thread for 220 ms
It is advised to either limit, remove or delay the loading of redundant third-party code which may be significantly impacting load performance.
Third-Party Size (Bytes) Main-Thread Blocking Time (Ms)
23131
223.08
676
0

Budgets

Performance budget
It is advised to keep the quantity and size of all network requests under the targets set by the provided performance budget.

Other

Network Requests
Below is a list of network requests that were made during page load.
URL Start Time (Ms) End Time (Ms) Transfer Size (Bytes) Resource Size (Bytes) Status Code MIME Type Resource Type
http://lister.co.id/
0
670.28199997731
292
0
301
text/html
https://lister.co.id/
670.91400013305
1179.5060001314
32742
303687
200
text/html
Document
https://lister.co.id/wp-content/cache/wpfc-minified/erozwolg/67aef.css
1191.3630000781
1951.0449999943
46495
301920
200
text/css
Stylesheet
https://www.google-analytics.com/analytics.js
1191.5919999592
1198.3270000201
19076
45892
200
text/javascript
Script
https://lister.co.id/wp-content/plugins/autoptimize/classes/external/js/lazysizes.min.js?ao_version=2.7.1
1201.7800000031
1452.5699999649
4234
8938
200
application/javascript
Script
https://lister.co.id/wp-includes/js/jquery/jquery.js
1202.1769999992
2437.7150000073
33271
96873
200
application/javascript
Script
https://lister.co.id/wp-content/cache/autoptimize/js/autoptimize_65a9c6ba3261e4f88f12317211f43ca4.js
1205.9130000416
2934.7719999496
102860
412956
200
application/javascript
Script
1975.9130000602
1975.9440000635
0
68
200
image/svg+xml
Image
1976.9640001468
1976.990000112
0
67
200
image/svg+xml
Image
1977.8780001216
1977.9060001019
0
69
200
image/svg+xml
Image
1978.7550000474
1978.7910000887
0
66
200
image/svg+xml
Image
1979.5940001495
1979.6240001451
0
66
200
image/svg+xml
Image
1980.4170001298
1980.4470001254
0
68
200
image/svg+xml
Image
1981.3490000088
1981.3790000044
0
68
200
image/svg+xml
Image
1982.137999963
1982.1659999434
0
68
200
image/svg+xml
Image
1982.9009999521
1982.9250001349
0
68
200
image/svg+xml
Image
1983.7939999998
1983.8169999421
0
68
200
image/svg+xml
Image
1984.7840000875
1984.8070000298
0
68
200
image/svg+xml
Image
1985.7580000535
1985.8140000142
0
66
200
image/svg+xml
Image
https://www.google-analytics.com/plugins/ua/ec.js
1991.6340000927
1994.4840001408
1943
2779
200
text/javascript
Script
https://www.google-analytics.com/plugins/ua/linkid.js
1992.409999948
1995.539000025
1495
1569
200
text/javascript
Script
https://lister.co.id/wp-content/uploads/2020/04/wave-2.png
2003.1129999552
2254.6320001129
19888
19541
200
image/png
Image
https://lister.co.id/wp-content/plugins/elementor/assets/lib/font-awesome/webfonts/fa-solid-900.woff2
2016.5389999747
3512.3950000852
75800
75440
200
application/font-woff2
Font
https://lister.co.id/wp-content/plugins/elementor/assets/lib/font-awesome/webfonts/fa-regular-400.woff2
2016.9679999817
3245.5080000218
13940
13580
200
application/font-woff2
Font
https://lister.co.id/wp-content/plugins/elementor/assets/lib/font-awesome/webfonts/fa-brands-400.woff2
2020.2290001325
2523.302000016
74868
74508
200
application/font-woff2
Font
https://lister.co.id/wp-content/uploads/2020/04/121.png
2105.7339999825
3135.5840000324
11072
10725
200
image/png
Image
https://lister.co.id/wp-content/uploads/2020/04/Hero-Image-2.png
2105.8490001597
3834.720000159
109871
109523
200
image/png
Image
https://www.google-analytics.com/collect?v=1&_v=j82&aip=1&a=1062342480&t=pageview&_s=1&dl=https%3A%2F%2Flister.co.id%2F&ul=en-us&de=UTF-8&dt=LISTER%20Kursus%20Bahasa%20Asing%20Online%20%7C%20Learn%20With%20Experts&sd=24-bit&sr=412x660&vp=412x660&je=0&_u=aGBAgEIr~&jid=822466169&gjid=2066941935&cid=375696797.1589352928&tid=UA-163739051-1&_gid=22597574.1589352928&_av=2.4.0&_au=20&did=i5iSjo&z=537786950
3009.7509999759
3012.7499999944
617
35
200
image/gif
Image
https://stats.g.doubleclick.net/r/collect?t=dc&aip=1&_r=3&v=1&_v=j82&tid=UA-163739051-1&cid=375696797.1589352928&jid=822466169&gjid=2066941935&_gid=22597574.1589352928&_u=aGBAgEIr~&z=418429093
3009.9309999496
3013.6470000725
676
35
200
image/gif
Image
https://lister.co.id/wp-content/plugins/elementor/assets/lib/eicons/fonts/eicons.woff2?5.5.0
3082.0079999976
3823.972000042
73076
72716
200
application/font-woff2
Font
https://lister.co.id/wp-content/plugins/wp-youtube-lyte/lyteThumbs.php?origThumbUrl=%2F%2Fi.ytimg.com%2Fvi%2FPuzdURNQSYc%2Fhqdefault.jpg
3901.5409999993
4166.4909999818
9151
8792
200
image/jpeg
Image
https://lister.co.id/wp-content/plugins/wp-youtube-lyte/lyte/lytesprite.png
3901.6599999741
4157.3520000093
5185
4839
200
image/png
Image
Network Round Trip Times — 0 ms
High Network RTT (Round Trip Times) can have a large impact on performance. Providing servers geographically closer to the user could improve performance.
Server Backend Latencies — 0 ms
High server latencies indicate the server is overloaded or has a poor backend performance.
Tasks
Below is a list of the top-level main thread tasks that executed during page load.
Start Time (Ms) End Time (Ms)
1199.102
6.679
1969.492
11.991
1981.528
22.417
2004.024
95.349
2099.491
5.581
2460.97
15.669
2546.321
38.961
2970.789
237.004
3207.9
10.088
3231.827
12.13
3265.482
55.241
3530.656
6.226
3536.918
57.674
3842.971
5.022
3848.491
61.3
3913.163
8.336
3921.758
5.916
3931.81
10.509
4248.486
5.346
4498.438
8.488
Diagnostics
Below is a collection of useful page vitals.
View Data
Metrics
Below is a collection of metrics.
View Data
First Contentful Paint (3G) — 3390 ms
The time taken for the first image or text on the page to be rendered while on a 3G network.

Metrics

Time to Interactive — 4.4 s
The time taken for the page to become fully interactive.
First CPU Idle — 4.3 s
The time taken for the page's main thread to be quiet enough to handle input.

Other

Estimated Input Latency — 80 ms
The time taken for the page to respond to user input (during the busiest 5 second window of page load). Users are likely to perceive lister.co.id as laggy when the latency is higher than 0.05 seconds.
Total Blocking Time — 370 ms
The total blocking time is the sum of all time periods between First Contentful Paint and Time to Interactive (when task length exceeded 50ms).

Opportunities

Eliminate render-blocking resources — Potential savings of 440 ms
Resources, such as JavaScript and style sheets, can block the first paint of the page. Lister.co.id should consider delivering critical JavaScript/style sheets (JS/CSS) inline and deferring all non-critical JS/CSS.
URL Size (Bytes) Potential Savings (Ms)
https://lister.co.id/wp-content/cache/wpfc-minified/erozwolg/67aef.css
46495
480
Properly size images — Potential savings of 73 KB
Images can slow down the page's load time. Lister.co.id should consider serving more appropriate-sized images.
URL Size (Bytes) Potential Savings (Bytes)
https://lister.co.id/wp-content/uploads/2020/04/Hero-Image-2.png
109523
74860
Remove unused CSS — Potential savings of 43 KB
Dead and/or unused rules in Style Sheets (CSS) can contribute to network payload sizes. Lister.co.id should consider removing dead rules from style sheets and deferring the loading of CSS not used for above-the-fold content.
URL Size (Bytes) Potential Savings (Bytes)
https://lister.co.id/wp-content/cache/wpfc-minified/erozwolg/67aef.css
46495
43860
Serve images in next-gen formats — Potential savings of 73 KB
Image formats like PNG and JPEG have poor compression when compared to other next-gen formats, such as JPEG 200, JPEG XR and WebP.
URL Size (Bytes) Potential Savings (Bytes)
https://lister.co.id/wp-content/uploads/2020/04/Hero-Image-2.png
109523
75011
Preload key requests — Potential savings of 720 ms
Key requests can be preloaded by using '<link rel=preload>'. Lister.co.id should consider using '<link rel=preload>' to prioritize fetching resources that are currently requested later in page load.
URL Potential Savings (Ms)
https://lister.co.id/wp-content/plugins/elementor/assets/lib/font-awesome/webfonts/fa-regular-400.woff2
720
https://lister.co.id/wp-content/plugins/elementor/assets/lib/font-awesome/webfonts/fa-brands-400.woff2
720
https://lister.co.id/wp-content/plugins/elementor/assets/lib/eicons/fonts/eicons.woff2?5.5.0
420

Diagnostics

Minimize main-thread work — 3.5 s
Main-thread work timing can be lowered by reducing the time required for parsing, compiling and executing JS. Delivering smaller JS payloads may help with this.
Category Time Spent (Ms)
Style & Layout
1298.616
Script Evaluation
1067.688
Rendering
632.136
Other
402.644
Parse HTML & CSS
93.964
Script Parsing & Compilation
51.796

Metrics

Speed Index — 6.8 s
The time taken for the page contents to be visibly populated.
Max Potential First Input Delay — 470 ms
Users could experience a delay when interacting with the page.

Diagnostics

Avoid an excessive DOM size — 1,711 elements
A large DOM (Document Object Model) will increase memory usage, cause longer system calculations as well as costly layout reflows.
Statistic Element Value
Total DOM Elements
1,711
Maximum DOM Depth
32
Maximum Child Elements
33
Ensure text remains visible during webfont load
Make use of the font-display CSS feature, which will ensure text is user-visible while webfonts are loading.
URL Potential Savings (Ms)
https://lister.co.id/wp-content/plugins/elementor/assets/lib/font-awesome/webfonts/fa-solid-900.woff2
1495.8560001105
https://lister.co.id/wp-content/plugins/elementor/assets/lib/font-awesome/webfonts/fa-regular-400.woff2
1228.5400000401
https://lister.co.id/wp-content/plugins/elementor/assets/lib/font-awesome/webfonts/fa-brands-400.woff2
503.07299988344
https://lister.co.id/wp-content/plugins/elementor/assets/lib/eicons/fonts/eicons.woff2?5.5.0
741.96400004439
97

Accessibility

Indicates how accessible the page is and highlights opportunities where the page can be made more accessible to users of lister.co.id. This includes details about various page attributes that can be optimized.

Navigation

`[accesskey]` values are unique
Access keys assist users with focusing on different parts of the page. Each access key should be unique for proper navigation.
The page contains a heading, skip link, or landmark region
It is advised to provide ways to bypass repetitive content, allowing users to navigate the page efficiently.
No element has a `[tabindex]` value greater than 0
Although technically valid, a tabindex value greater than 0 often creates frustrating experiences for users who rely on assistive technologies.

ARIA

`[aria-*]` attributes match their roles
Avoid mismatching 'aria-*' attributes and their 'role' value, as it invalidates the attribute.
`[role]`s have all required `[aria-*]` attributes
Some ARIA roles have required 'aria-*' attributes, which provide essential information about state and functionality.
Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.
Some ARIA parent roles cannot perform their intended functions if specific child roles are not used.
`[role]`s are contained by their required parent element
Some ARIA child roles cannot perform their intended functions if specific parent roles are not used.
`[role]` values are valid
All ARIA roles require valid values to perform their intended functions.
`[aria-*]` attributes have valid values
ARIA attributes cannot be interpreted with invalid values when used by screen readers and other assistive technologies.
`[aria-*]` attributes are valid and not misspelled
ARIA attributes cannot be interpreted with invalid names when used by screen readers and other assistive technologies.

Audio and video

`<audio>` elements contain a `<track>` element with `[kind="captions"]`
Lister.co.id may provide assistance to deaf or hearing-impaired users with captions on audio elements.
`<video>` elements contain a `<track>` element with `[kind="captions"]`
Lister.co.id may provide assistance to deaf or hearing-impaired users with captions on videos.
`<video>` elements contain a `<track>` element with `[kind="description"]`
Lister.co.id may provide relevant information that dialogue cannot, by using audio descriptions.

Names and labels

Buttons have an accessible name
Buttons become unusable as they are announced simply as "button" when the button does not have an accessible name, when used by screen readers and other assistive technologies.
Document has a `<title>` element
Search engines, screen reader users and other assistive technology users rely on the title to provide an overview of the page and to help determine if the page is relevant to their search.
`<frame>` or `<iframe>` elements have a title
Screen reader users and other assistive technology users rely on frame titles to describe the contents of frames.
Image elements have `[alt]` attributes
Provide short and descriptive alternative text where possible on informative elements.
`<input type="image">` elements have `[alt]` text
Input buttons with alternative text assist screen readers and other assistive technology users to understand its purpose.
Form elements have associated labels
Screen readers and other assistive technologies rely on labels to properly announce form controls.
Links have a discernible name
In order to improve the navigation for screen reader and other assistive technology users, use link text that is unique, focusable and discernible.
`<object>` elements have `[alt]` text
It is advised that alt text is used on '<object>' elements in order to provide meaning to screen reader and other assistive technology users, as these technologies are unable to translate non-text content.

Tables and lists

`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>` or `<template>` elements.
Screen readers and other assistive technologies may produce poor and inaccurate output when definition lists are not properly marked up.
Definition list items are wrapped in `<dl>` elements
In order for screen readers and other assistive technologies to properly announce definition list items ('<dt>' and '<dd>'), they must be wrapped in parent a '<dl>' element.
Presentational `<table>` elements avoid using `<th>`, `<caption>` or the `[summary]` attribute.
It is advised to not include data elements in tables which are used for layout purposes, as it may create confusion for screen reader and other assistive technology users.
Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
Use proper list structure to aid screen readers and other assistive technologies.
List items (`<li>`) are contained within `<ul>` or `<ol>` parent elements
In order for screen readers to announce list items, ensure that list items ('<li>') are contained within parent '<ul>' or '<ol>' tags.
Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.
Screen readers and other assistive technologies have features to make navigating tables easier. Ensure that '<td>' cells using the headers attribute only refer to other cells in the same table, to improve screen reader user experience.
`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.
Screen readers and other assistive technologies have features to make navigating tables easier. Ensure that table headers refer to some set of cells, to improve screen reader user experience.

Internationalization and localization

`<html>` element has a `[lang]` attribute
It is advised to provide a lang attribute so that screen readers and other assistive technologies are guaranteed to announce the page's text correctly. When not provided, the user's default language setting will be used which may cause inaccuracies.
`<html>` element has a valid value for its `[lang]` attribute
Specify a valid BCP 47 language in order to help screen readers and other assistive technologies announce text properly.
`[lang]` attributes have a valid value
Specify a valid BCP 47 language on elements in order to help screen readers and other assistive technologies announce text properly.

Best practices

The document does not use `<meta http-equiv="refresh">`
Pages that refresh automatically cause a poor user experience as focus is directed back to the top of the page unexpectedly.
`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
For users with low vision who rely on screen magnification, ensure that zooming is not disabled.

Contrast

Background and foreground colors do not have a sufficient contrast ratio.
Many (if not most) users find low-contrast text difficult or impossible to read.
Failing Elements

Best practices

`[id]` attributes on the page are not unique
It is advised to keep all id attributes unique in order to prevent instances from being overlooked by screen readers and other assistive technologies.
Failing Elements
svg
svg

Manual Checks

The page has a logical tab order
The visual layout should be logical in its tab order and users cannot focus elements that are offscreen.
Interactive controls are keyboard focusable
Ensure that custom interactive controls are keyboard focusable and that a focus indicator is displayed.
Interactive elements indicate their purpose and state
Ensure that interactive elements (such as links and buttons) are distinguishable from non-interactive elements and that they indicate their state.
The user's focus is directed to new content added to the page
When new content (such as a dialogue) is added to the page, the user's focus should be directed to it.
User focus is not accidentally trapped in a region
Avoid focus being accidentally trapped when a user tabs in and out of controls or regions on page.
Custom controls have associated labels
Ensure that custom interactive controls have associated labels, which are provided by aria-label and aria-labelledby attributes.
Custom controls have ARIA roles
Ensure that all custom interactive controls have appropriate ARIA roles.
Visual order on the page follows DOM order
Ensure that the DOM order matches with the page's visual order, in order to improve navigation for screen readers and other assistive technologies.
Offscreen content is hidden from assistive technology
Ensure that offscreen content is hidden through the use of "display:none" styling or the aria-hidden attribute.
Headings don't skip levels
Ensure that headings create an outline for the page and that heading levels are not skipped.
HTML5 landmark elements are used to improve navigation
Elements such as <main> and <nav> are recommended as they are used by screen readers and other assistive technologies to improve keyboard navigation.
69

Best Practices

Indicates the recommended, best practices currently in place on the page and highlights the best practices that lister.co.id should incorporate. This includes practices such as protecting pages with HTTPS.

Other

Avoids Application Cache
Application cache is deprecated and is no longer recommended.
Avoids `document.write()`
Avoid or limit the use of external scripts that are dynamically injected via 'document.write()' as users on slow connections will be delayed by tens of seconds.
Avoids requesting the geolocation permission on page load
When requesting a user's location, provide context or consider tying the request to a user action to avoid confusion and mistrust from users.
Page has the HTML doctype
Ensure a doctype is specified to prevent the browser from switching to quirks-mode.
Detected JavaScript libraries
Below is a list of all front-end JavaScript libraries that were detected on the page.
Name Version
jQuery
1.12.4
jQuery (Fast path)
jQuery UI
WordPress
Avoids requesting the notification permission on page load
When requesting permission to send notifications, provide context or consider tying the request to a user action to avoid confusion and mistrust from users.
Avoids deprecated APIs
Avoid deprecated APIs which will eventually be removed the browser.
Allows users to paste into password fields
Ensure that password inputs may be pasted into to aid in the user's ability to use password managers and improve security.
No browser errors logged to the console
Below is a list of all errors logged to the console, which indicate unresolved problems on the site.
Displays images with correct aspect ratio
Ensure that image display dimensions match their natural aspect ratio.

Other

Does not use HTTPS — 1 insecure request found
Ensure that all pages are protected with HTTPS (including those that do not handle sensitive data) as HTTPS prevents tampering and passive listening on communications between the app and its users. Additionally, HTTPS is a prerequisite for HTTP/2 and many new web platform APIs.
Insecure URL
http://lister.co.id/
Does not use passive listeners to improve scrolling performance
Improve the page's scroll performance by marking touch and wheel event listeners as 'passive'.
URL Location
https://lister.co.id/wp-includes/js/jquery/jquery.js
line: 2
Links to cross-origin destinations are unsafe
Improve performance and prevent security vulnerabilities by adding rel="noopener" and rel="noreferrer" to external links.
Includes front-end JavaScript libraries with known security vulnerabilities — 2 vulnerabilities detected
Ensure that the use of third-party scripts is minimal and that only trusted third-party scripts are used as some may contain known security vulnerabilities which may be exploited by attackers.
Library Version Vulnerability Count Highest Severity
2
Medium
90

SEO

Indicates how well the page is optimized for ranking in search engines and highlights Search Engine Optimization (SEO) opportunities for lister.co.id. This includes optimizations such as providing meta data.

Mobile Friendly

Has a `<meta name="viewport">` tag with `width` or `initial-scale`
It is advised to use a '<meta name="viewport">' tag for the optimization of lister.co.id on mobile screens.
Document uses legible font sizes — 99.91% legible text
Font sizes of 12px or less are too small to most mobile users without user gestures and further action. Aim for more than 60% of page text to use font sizes greater than 12px.
Source Selector % of Page Text Font Size
https://lister.co.id/wp-content/cache/wpfc-minified/erozwolg/67aef.css:3:92056
.elementor-slick-slider ul.slick-dots li button
0.09%
0px
Legible text
99.91%
≥ 12px

Content Best Practices

Document has a `<title>` element
Search engines, screen reader users and other assistive technology users rely on the title to provide an overview of the page and to help determine if the page is relevant to their search.
Document has a meta description
Meta descriptions may be used by search engines when displaying a link to the page and should concisely summarize the page's content.
Image elements have `[alt]` attributes
Provide short and descriptive alternative text where possible on informative elements.
Document has a valid `hreflang`
Search engines can be instructed to list specific versions of a page for a given language or region through the use of hreflang links.
Document has a valid `rel=canonical`
Search engines can be suggested which URL should be shown in search results through the use of canonical links.
Document avoids plugins
The content of plugins cannot be indexed by search engines and many devices either restrict or do not support them.

Crawling and Indexing

Page has successful HTTP status code
Avoid pages with unsuccessful HTTP status codes as they may not be indexed by search engines.
Page isn’t blocked from indexing
Pages that cannot be crawled by search engines cannot be indexed or included in their search results. Ensure that search engines have permission to crawl all pages that should be indexed.
robots.txt is valid
Malformed robots.txt files prevent crawlers from understanding how a site wants to be crawled or indexed, which can be devastating to SEO.

Mobile Friendly

Tap targets are not sized appropriately — 78% appropriately sized tap targets
Interactive elements (such as buttons and links) should be appropriately spaced, sized and easy enough to select or tap with regard to their surrounding elements.
Tap Target Size Overlapping Target
1
20x20
2
2
20x20
3
3
20x20
4
4
20x20
5
5
20x20
6
6
20x20
7
7
20x20
8
8
20x20
9
9
20x20
10
10
20x20
11

Content Best Practices

Links do not have descriptive text — 27 links found
Make use of descriptive link text to assist search engines in understanding the content.

Manual Checks

Structured data is valid
Structured data can be validated through the use of the Structured Data Testing Tool and the Structured Data Linter.
52

Progressive Web App

Indicates how valid the aspects of a Progressive Web App (PWA) are for the page and highlights opportunities to enable/improve the PWA of lister.co.id. This includes details about web app manifests.

Fast and reliable

Page load is fast enough on mobile networks
Ensure that the page loads fast enough over a cellular network, to ensure good mobile user experience.

PWA Optimized

Redirects HTTP traffic to HTTPS
It is advised to redirect all HTTP traffic to HTTPS, in order to enable secure web features for all users.
Content is sized correctly for the viewport
Ensure that the width of the app's content matches the width of the viewport, otherwise the app might not be optimized for mobile screens.
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
It is advised to use a '<meta name="viewport">' tag for the optimization of lister.co.id on mobile screens.
Contains some content when JavaScript is not available
Apps should display alternative content for when JavaScript is disabled.
Provides a valid `apple-touch-icon`
iOS users of Progressive Web Apps will benefit from an apple touch icon, which can be defined with 'apple-touch-icon', which must point to a non-transparent 192px (or 180px) square PNG.

Fast and reliable

Current page does not respond with a 200 when offline
In order for Progressive Web Apps to be made available offline, ensure that the app is using a service worker.
`start_url` does not respond with a 200 when offline
Consider using a service worker for Progressive Web Apps to ensure greater reliability for the user, in the case of poor network conditions.

Installable

Does not use HTTPS — 1 insecure request found
Ensure that all pages are protected with HTTPS (including those that do not handle sensitive data) as HTTPS prevents tampering and passive listening on communications between the app and its users. Additionally, HTTPS is a prerequisite for HTTP/2 and many new web platform APIs.
Insecure URL
http://lister.co.id/
Does not register a service worker that controls page and `start_url`
A service worker is used to provide Progressive Web Apps the use of features such as working offline, the ability for the app to be added to the homescreen as well as push notifications.
Web app manifest does not meet the installability requirements
User engagement may be increased by leveraging the browsers ability to proactively prompt users to add the app to their homescreen.
View Data

PWA Optimized

Is not configured for a custom splash screen
Themed splash screens ensure a high-quality user experience at launch for app users.
View Data
Does not set a theme color for the address bar.
A theme may be applied to the browser address bar, which ideally can be made to match the site.
View Data

Manual Checks

Site works cross-browser
Ensure that the Progressive Web App works correctly across every major browser.
Page transitions don't feel like they block on the network
Users perceive apps with responsive, snappy transitions as higher peforming and ensures a great user experience, even on a slow network.
Each page has a URL
Ensure that all pages are deep linkable via URL. They should also be unique for the purpose of shareability on social media.
Hosting

Server Location

Server IP Address: 101.50.1.37
Continent: Asia
Country: Indonesia
Indonesia Flag
Region:
City:
Longitude: 106.8286
Latitude: -6.175
Currencies: IDR
Languages: Indonesian

Web Hosting Provider

Name IP Address
PT. Beon Intermedia
Registration

Domain Registrant

Private Registration: No
Name:
Organization:
Country:
City:
State:
Post Code:
Email:
Phone:
Note: Registration information is derived from various sources and may be inaccurate.

Domain Registrar

Security

Visitor Safety

Mature Content: Not Likely
McAfee WebAdvisor Rating: Unknown
WOT Rating:
WOT Trustworthiness:
WOT Child Safety:
Note: Safety information is not guaranteed.

SSL/TLS Certificate

Issued To: lister.co.id
Issued By: cPanel, Inc. Certification Authority
Valid From: 2nd April, 2020
Valid To: 1st July, 2020
Subject: CN = lister.co.id
Hash: 2e4f957e
Issuer: CN = cPanel, Inc. Certification Authority
O = cPanel, Inc.
S = US
Version: 2
Serial Number: 0xB06BACC771AC6DAF22A133B8A0D1E90D
Serial Number (Hex): B06BACC771AC6DAF22A133B8A0D1E90D
Valid From: 2nd April, 2024
Valid To: 1st July, 2024
Signature Algorithm (Short Name): RSA-SHA256
Signature Algorithm (Long Name): sha256WithRSAEncryption
Authority Key Identifier: keyid:7E:03:5A:65:41:6B:A7:7E:0A:E1:B8:9D:08:EA:1D:8E:1D:6A:C7:65
Extended Key Usage: TLS Web Server Authentication, TLS Web Client Authentication
CRL Distribution Points:
Full Name:
URI:http://crl.comodoca.com/cPanelIncCertificationAuthority.crl

Certificate Policies: Policy: 1.3.6.1.4.1.6449.1.2.2.52
CPS: https://sectigo.com/CPS
Policy: 2.23.140.1.2.1

Authority Information Access: CA Issuers - URI:http://crt.comodoca.com/cPanelIncCertificationAuthority.crt
OCSP - URI:http://ocsp.comodoca.com

SCT List: Signed Certificate Timestamp:
Version : v1 (0x0)
Log ID : 07:B7:5C:1B:E5:7D:68:FF:F1:B0:C6:1D:23:15:C7:BA:
E6:57:7C:57:94:B7:6A:EE:BC:61:3A:1A:69:D3:A2:1C
Timestamp : Apr 2 23:01:27.425 2020 GMT
Extensions: none
Signature : ecdsa-with-SHA256
30:45:02:20:16:4D:6E:4F:05:7A:77:8E:25:7A:07:6C:
C8:D4:C0:34:0C:D0:63:A0:4A:92:22:09:59:60:4E:46:
DB:4A:5D:F0:02:21:00:8C:30:82:E5:73:69:0A:F8:CC:
04:B3:5D:1C:A8:60:F3:8A:71:84:63:97:9D:19:81:F1:
89:B6:13:1D:44:4E:31
Signed Certificate Timestamp:
Version : v1 (0x0)
Log ID : E7:12:F2:B0:37:7E:1A:62:FB:8E:C9:0C:61:84:F1:EA:
7B:37:CB:56:1D:11:26:5B:F3:E0:F3:4B:F2:41:54:6E
Timestamp : Apr 2 23:01:27.577 2020 GMT
Extensions: none
Signature : ecdsa-with-SHA256
30:44:02:20:3F:98:64:4A:26:B4:FE:2C:49:9C:E3:B2:
A9:31:8C:B6:0E:75:CE:75:65:BB:93:76:03:96:04:1B:
AA:5B:B2:C0:02:20:4E:CA:D7:B3:E1:9B:72:41:83:97:
DA:CC:CD:92:5A:6C:81:1F:4D:7A:B5:D8:B9:FE:50:2F:
CA:28:5A:96:17:D3
Key Usage: Digital Signature, Key Encipherment
Basic Constraints: CA:FALSE
Subject Alternative Name: DNS:cpanel.lister.co.id
DNS:cpcalendars.lister.co.id
DNS:cpcontacts.lister.co.id
DNS:mail.lister.co.id
DNS:webdisk.lister.co.id
DNS:webmail.lister.co.id
DNS:www.lister.co.id
DNS:lister.co.id
Technical

DNS Lookup

A Records

Host IP Address Class TTL
lister.co.id. 101.50.1.37 IN 14399

NS Records

Host Nameserver Class TTL
lister.co.id. ns.beonintermedia.com. IN 21599
lister.co.id. ns.jagoanweb.com. IN 21599
lister.co.id. ns.jagoanhosting.com. IN 21599

MX Records

Priority Host Server Class TTL
10 lister.co.id. aspmx3.googlemail.com. IN 14399
1 lister.co.id. aspmx.l.google.com. IN 14399
5 lister.co.id. alt1.aspmx.l.google.com. IN 14399
5 lister.co.id. alt2.aspmx.l.google.com. IN 14399
10 lister.co.id. aspmx2.googlemail.com. IN 14399

SOA Records

Domain Name Primary NS Responsible Email TTL
lister.co.id. ns.jagoanhosting.com. admin.jagoanhosting.com. 21599

TXT Records

Host Value Class TTL
lister.co.id. google-site-verification=mp1mg6BHKMcKeADRoTseYbvNNBgpQGIrCDyUfh3iM6U IN 14399
lister.co.id. v=spf1 IN 14399
lister.co.id. google-site-verification=HNUlzIQp6_rkuIgg9Ph7XSLOVHFJ4AJ3jtHtw5VuA0A IN 14399

HTTP Response Headers

HTTP-Code: HTTP/1.1 200 OK
Content-Type: text/html
Date: 13th May, 2020
Server: LiteSpeed
Cache-Control: max-age=0, no-cache, no-store, must-revalidate
Expires: 29th October, 1923
Last-Modified: 13th May, 2020
Content-Length: 303687
Accept-Ranges: bytes
Pragma: no-cache
Alt-Svc: quic=":443"; ma=2592000; v="35,39,43,44"
Connection: Keep-Alive

Whois Lookup

Created: 21st October, 2019
Changed: 26th October, 2019
Expires: 21st October, 2020
Status: ok
Nameservers: ns.beonintermedia.com
ns.jagoanhosting.com
ns.jagoanweb.com
Full Whois: Domain ID: PANDI-DO1690401
Domain Name:lister.co.id
Created On:2019-10-21 05:30:53
Last Updated On:2019-10-26 05:42:04
Expiration Date:2020-10-21 23:59:59
Status:ok
=======================================================
Sponsoring Registrar PANDI ID:digitalreg
Sponsoring Registrar Organization:Digital Registra
Sponsoring Registrar City:Sleman
Sponsoring Registrar State/Province:Yogyakarta
Sponsoring Registrar Postal Code:55281
Sponsoring Registrar Country:ID
Sponsoring Registrar Phone:0274882257
Sponsoring Registrar Contact Email:info@digitalregistra.co.id
Name Server:ns.beonintermedia.com
Name Server:ns.jagoanhosting.com
Name Server:ns.jagoanweb.com
DNSSEC:Unsigned

Nameservers

Name IP Address
ns.beonintermedia.com 146.190.98.67
ns.jagoanhosting.com 51.79.192.197
ns.jagoanweb.com 103.163.138.126
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