optimizely .blog
4.60
Results from https://optimizely.blog/
Lighthouse Performance
4.40
Results collected at 2024-11-13
- The website is fast.
Performance section:
- Total Blocking Time 5.00
- Largest Contentful Paint: 3.2 s 3.55
- Cumulative Layout Shift 5.00
- First Contentful Paint: 2.7 s 3.00
- Speed Index: 2.7 s 4.80
- Largest Contentful Paint element 1.00
- Eliminate render-blocking resources 1.00
- Reduce unused CSS 1.00
- Reduce unused JavaScript 1.00
- Properly size images 1.00
- Avoid an excessive DOM size 1.00
- Image elements do not have explicit `width` and `height`: 2.50
- Serve static assets with an efficient cache policy: 4 resources found 2.50
- Time to Interactive: 4.6 s 4.05
- Max Potential First Input Delay: 100 ms 4.85
- Has a `<meta name="viewport">` tag with `width` or `initial-scale` 5.00
- Screenshot Thumbnails 5.00
- Final Screenshot 5.00
- Initial server response time was short 5.00
- Avoid chaining critical requests 5.00
- Avoid multiple page redirects 5.00
- Minimizes main-thread work 5.00
- JavaScript execution time 5.00
- Preconnect to required origins 5.00
- All text remains visible during webfont loads 5.00
- Diagnostics 5.00
- Network Requests 5.00
- Network Round Trip Times 5.00
- Server Backend Latencies 5.00
- Tasks 5.00
- Metrics 5.00
- Resources Summary 5.00
- Minimize third-party usage 5.00
- Largest Contentful Paint image was not lazily loaded 5.00
- Avoid large layout shifts 5.00
- Avoid long main-thread tasks 5.00
- Preload Largest Contentful Paint image 5.00
- Script Treemap Data 5.00
- Avoids enormous network payloads 5.00
- Defer offscreen images 5.00
- Minify CSS 5.00
- Minify JavaScript 5.00
- Serve images in next-gen formats 5.00
- Efficiently encode images 5.00
- Enable text compression 5.00
- Use video formats for animated content 5.00
- Remove duplicate modules in JavaScript bundles 5.00
- Avoid serving legacy JavaScript to modern browsers 5.00
- Avoids `document.write()` 5.00
- Use HTTP/2 5.00
- Uses passive listeners to improve scrolling performance 5.00
- Page didn't prevent back/forward cache restoration 5.00
Performance section:
- Total Blocking Time 5.00
- Largest Contentful Paint: 3.2 s 3.55
- Cumulative Layout Shift 5.00
- First Contentful Paint: 2.7 s 3.00
- Speed Index: 2.7 s 4.80
- Largest Contentful Paint element 1.00
- Eliminate render-blocking resources 1.00
- Reduce unused CSS 1.00
- Reduce unused JavaScript 1.00
- Properly size images 1.00
- Avoid an excessive DOM size 1.00
- Image elements do not have explicit `width` and `height`: 2.50
- Serve static assets with an efficient cache policy: 4 resources found 2.50
- Time to Interactive: 4.6 s 4.05
- Max Potential First Input Delay: 100 ms 4.85
- Has a `<meta name="viewport">` tag with `width` or `initial-scale` 5.00
- Screenshot Thumbnails 5.00
- Final Screenshot 5.00
- Initial server response time was short 5.00
- Avoid chaining critical requests 5.00
- Avoid multiple page redirects 5.00
- Minimizes main-thread work 5.00
- JavaScript execution time 5.00
- Preconnect to required origins 5.00
- All text remains visible during webfont loads 5.00
- Diagnostics 5.00
- Network Requests 5.00
- Network Round Trip Times 5.00
- Server Backend Latencies 5.00
- Tasks 5.00
- Metrics 5.00
- Resources Summary 5.00
- Minimize third-party usage 5.00
- Largest Contentful Paint image was not lazily loaded 5.00
- Avoid large layout shifts 5.00
- Avoid long main-thread tasks 5.00
- Preload Largest Contentful Paint image 5.00
- Script Treemap Data 5.00
- Avoids enormous network payloads 5.00
- Defer offscreen images 5.00
- Minify CSS 5.00
- Minify JavaScript 5.00
- Serve images in next-gen formats 5.00
- Efficiently encode images 5.00
- Enable text compression 5.00
- Use video formats for animated content 5.00
- Remove duplicate modules in JavaScript bundles 5.00
- Avoid serving legacy JavaScript to modern browsers 5.00
- Avoids `document.write()` 5.00
- Use HTTP/2 5.00
- Uses passive listeners to improve scrolling performance 5.00
- Page didn't prevent back/forward cache restoration 5.00
404 Page
4.20
Results collected at 2024-11-13
- Correct status code? Got 200, and 404 is correct. 1.00
- Found a page title in the page's metadata? 5.00
- Found headline (h1)? 5.00
- Is it lacking text describing that an error has occurred (in Swedish OR English for English sites)? 5.00
- Is text content length is less than 150 characters, which indicates that the user is not being referred, nor advised? 5.00
- Found a page title in the page's metadata? 5.00
- Found headline (h1)? 5.00
- Is it lacking text describing that an error has occurred (in Swedish OR English for English sites)? 5.00
- Is text content length is less than 150 characters, which indicates that the user is not being referred, nor advised? 5.00
Lighthouse SEO
5.00
Results collected at 2024-11-13
- The webpage is really optimised for SEO!
- Page isn’t blocked from indexing 5.00
- Document has a `<title>` element 5.00
- Image elements have `[alt]` attributes 5.00
- Document has a meta description 5.00
- Page has successful HTTP status code 5.00
- Links have descriptive text 5.00
- Links are crawlable 5.00
- robots.txt is valid 5.00
- Document has a valid `hreflang` 5.00
- Document has a valid `rel=canonical` 5.00
- Page isn’t blocked from indexing 5.00
- Document has a `<title>` element 5.00
- Image elements have `[alt]` attributes 5.00
- Document has a meta description 5.00
- Page has successful HTTP status code 5.00
- Links have descriptive text 5.00
- Links are crawlable 5.00
- robots.txt is valid 5.00
- Document has a valid `hreflang` 5.00
- Document has a valid `rel=canonical` 5.00
Lighthouse Best Practices
5.00
Results collected at 2024-11-13
- The website is adhering to best practice according to Google Lighthouse!
- Uses HTTPS 5.00
- Avoids deprecated APIs 5.00
- Avoids third-party cookies 5.00
- Allows users to paste into input fields 5.00
- Has a `<meta name="viewport">` tag with `width` or `initial-scale` 5.00
- No browser errors logged to the console 5.00
- Displays images with correct aspect ratio 5.00
- Serves images with appropriate resolution 5.00
- Page has the HTML doctype 5.00
- Properly defines charset 5.00
- Avoids requesting the geolocation permission on page load 5.00
- No issues in the `Issues` panel in Chrome Devtools 5.00
- Avoids requesting the notification permission on page load 5.00
- Document uses legible font sizes 5.00
- Page has valid source maps 5.00
- Ensure CSP is effective against XSS attacks 5.00
- Detected JavaScript libraries 5.00
- Uses HTTPS 5.00
- Avoids deprecated APIs 5.00
- Avoids third-party cookies 5.00
- Allows users to paste into input fields 5.00
- Has a `<meta name="viewport">` tag with `width` or `initial-scale` 5.00
- No browser errors logged to the console 5.00
- Displays images with correct aspect ratio 5.00
- Serves images with appropriate resolution 5.00
- Page has the HTML doctype 5.00
- Properly defines charset 5.00
- Avoids requesting the geolocation permission on page load 5.00
- No issues in the `Issues` panel in Chrome Devtools 5.00
- Avoids requesting the notification permission on page load 5.00
- Document uses legible font sizes 5.00
- Page has valid source maps 5.00
- Ensure CSP is effective against XSS attacks 5.00
- Detected JavaScript libraries 5.00
W3C HTML
5.00
Results collected at 2024-11-13
- No errors in the HTML code.
Standards section:
- #1: Webpage - Number of grouped error type: 0 5.00
- #1: Webpage - Number of errors: 0 5.00
Standards section:
- #1: Webpage - Number of grouped error type: 0 5.00
- #1: Webpage - Number of errors: 0 5.00
W3C CSS
4.96
Results collected at 2024-11-13
- The CSS is very good.
Standards section:
- `<style>` in: #1: Webpage , number of grouped error type: 0 5.00
- `<style>` in: #1: Webpage , number of errors: 0 5.00
- `<link rel="stylesheet">` in: #1: Webpage , number of grouped error type: 1 4.80
- `<link rel="stylesheet">` in: #1: Webpage , number of errors: 1 4.90
- CSS: “text-decoration”: “bold” is not a “text-decoration” value. (number of errors of this type: 1)
- `content-type=".*css.*"` in: #8: css2, number of grouped error type: 0 5.00
- `content-type=".*css.*"` in: #8: css2, number of errors: 0 5.00
- `style=""`, number of grouped error type: 0 5.00
- `style=""`, number of errors: 0 5.00
Standards section:
- `<style>` in: #1: Webpage , number of grouped error type: 0 5.00
- `<style>` in: #1: Webpage , number of errors: 0 5.00
- `<link rel="stylesheet">` in: #1: Webpage , number of grouped error type: 1 4.80
- `<link rel="stylesheet">` in: #1: Webpage , number of errors: 1 4.90
- CSS: “text-decoration”: “bold” is not a “text-decoration” value. (number of errors of this type: 1)
- `content-type=".*css.*"` in: #8: css2, number of grouped error type: 0 5.00
- `content-type=".*css.*"` in: #8: css2, number of errors: 0 5.00
- `style=""`, number of grouped error type: 0 5.00
- `style=""`, number of errors: 0 5.00
Standard Files
4.00
Results collected at 2024-11-13
- RSS subscription found in webpage metadata. 5.00
Standards section:
- robots.txt seems ok. 5.00
- Sitemap seems to be broken. 1.00
- Sitemap seems to be broken. 1.00
- security.txt seems to work. 5.00
Standards section:
- robots.txt seems ok. 5.00
- Sitemap seems to be broken. 1.00
- Sitemap seems to be broken. 1.00
- security.txt seems to work. 5.00
Lighthouse A11y
5.00
Results collected at 2024-11-13
- The website do not have any apparent issues with accessibility!
Accessibility section:
- `[aria-*]` attributes match their roles 5.00
- `[aria-hidden="true"]` is not present on the document `<body>` 5.00
- `[aria-*]` attributes have valid values 5.00
- `[aria-*]` attributes are valid and not misspelled 5.00
- Buttons have an accessible name 5.00
- Image elements have `[alt]` attributes 5.00
- `[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5. 5.00
- ARIA attributes are used as specified for the element's role 5.00
- Elements use only permitted ARIA attributes 5.00
- Background and foreground colors have a sufficient contrast ratio 5.00
- Document has a `<title>` element 5.00
- `<html>` element has a `[lang]` attribute 5.00
- `<html>` element has a valid value for its `[lang]` attribute 5.00
- Form elements have associated labels 5.00
- Links have a discernible name 5.00
- Links are distinguishable without relying on color. 5.00
- Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`). 5.00
- List items (`<li>`) are contained within `<ul>`, `<ol>` or `<menu>` parent elements 5.00
- No element has a `[tabindex]` value greater than 0 5.00
- Touch targets have sufficient size and spacing. 5.00
- Heading elements appear in a sequentially-descending order 5.00
- Skip links are focusable. 5.00
- Uses ARIA roles only on compatible elements 5.00
- Image elements do not have `[alt]` attributes that are redundant text. 5.00
- Identical links have the same purpose. 5.00
Accessibility section:
- `[aria-*]` attributes match their roles 5.00
- `[aria-hidden="true"]` is not present on the document `<body>` 5.00
- `[aria-*]` attributes have valid values 5.00
- `[aria-*]` attributes are valid and not misspelled 5.00
- Buttons have an accessible name 5.00
- Image elements have `[alt]` attributes 5.00
- `[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5. 5.00
- ARIA attributes are used as specified for the element's role 5.00
- Elements use only permitted ARIA attributes 5.00
- Background and foreground colors have a sufficient contrast ratio 5.00
- Document has a `<title>` element 5.00
- `<html>` element has a `[lang]` attribute 5.00
- `<html>` element has a valid value for its `[lang]` attribute 5.00
- Form elements have associated labels 5.00
- Links have a discernible name 5.00
- Links are distinguishable without relying on color. 5.00
- Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`). 5.00
- List items (`<li>`) are contained within `<ul>`, `<ol>` or `<menu>` parent elements 5.00
- No element has a `[tabindex]` value greater than 0 5.00
- Touch targets have sufficient size and spacing. 5.00
- Heading elements appear in a sequentially-descending order 5.00
- Skip links are focusable. 5.00
- Uses ARIA roles only on compatible elements 5.00
- Image elements do not have `[alt]` attributes that are redundant text. 5.00
- Identical links have the same purpose. 5.00
Sitespeed.io
5.00
Results collected at 2024-11-13
Performance section:
- [desktop] TTFB (Time to First Byte): 102.67ms, ±14.33ms 5.00
- [desktop] DOMContentLoaded: 292.00ms, ±5.00ms 5.00
- [desktop] FCP (First Contentful Paint): 335.00ms, ±0.00ms 5.00
- [desktop] LCP (Largest Contentful Paint): 335.00ms, ±0.00ms 5.00
- [desktop] Load: 366.67ms, ±15.33ms 5.00
- [desktop] CLS (Cumulative Layout Shift): 0.00ms, ±0.00ms 5.00
- [desktop] FirstVisualChange: 334.50ms, ±1.50ms 5.00
- [desktop] SpeedIndex: 336.00ms, ±2.00ms 5.00
- [desktop] VisualComplete85: 334.50ms, ±1.50ms 5.00
- [desktop] TBT (Total Blocking Time): 0.00ms, ±0.00ms 5.00
- [desktop] firstPaint: 335.00ms, ±0.00ms
- [desktop] LastVisualChange: 401.50ms, ±1.50ms
- [mobile] TTFB (Time to First Byte): 89.00ms, ±1.00ms 5.00
- [mobile] DOMContentLoaded: 266.67ms, ±0.33ms 5.00
- [mobile] FCP (First Contentful Paint): 306.67ms, ±0.33ms 5.00
- [mobile] LCP (Largest Contentful Paint): 306.67ms, ±0.33ms 5.00
- [mobile] Load: 327.67ms, ±2.33ms 5.00
- [mobile] FirstVisualChange: 300.50ms, ±0.50ms 5.00
- [mobile] SpeedIndex: 301.00ms, ±1.00ms 5.00
- [mobile] VisualComplete85: 300.50ms, ±0.50ms 5.00
- [mobile] CLS (Cumulative Layout Shift): 0.00ms, ±0.00ms 5.00
- [mobile] TBT (Total Blocking Time): 0.00ms, ±0.00ms 5.00
- [mobile] firstPaint: 306.67ms, ±0.33ms
- [mobile] LastVisualChange: 334.50ms, ±0.50ms
- [desktop] TTFB (Time to First Byte): 102.67ms, ±14.33ms 5.00
- [desktop] DOMContentLoaded: 292.00ms, ±5.00ms 5.00
- [desktop] FCP (First Contentful Paint): 335.00ms, ±0.00ms 5.00
- [desktop] LCP (Largest Contentful Paint): 335.00ms, ±0.00ms 5.00
- [desktop] Load: 366.67ms, ±15.33ms 5.00
- [desktop] CLS (Cumulative Layout Shift): 0.00ms, ±0.00ms 5.00
- [desktop] FirstVisualChange: 334.50ms, ±1.50ms 5.00
- [desktop] SpeedIndex: 336.00ms, ±2.00ms 5.00
- [desktop] VisualComplete85: 334.50ms, ±1.50ms 5.00
- [desktop] TBT (Total Blocking Time): 0.00ms, ±0.00ms 5.00
- [desktop] firstPaint: 335.00ms, ±0.00ms
- [desktop] LastVisualChange: 401.50ms, ±1.50ms
- [mobile] TTFB (Time to First Byte): 89.00ms, ±1.00ms 5.00
- [mobile] DOMContentLoaded: 266.67ms, ±0.33ms 5.00
- [mobile] FCP (First Contentful Paint): 306.67ms, ±0.33ms 5.00
- [mobile] LCP (Largest Contentful Paint): 306.67ms, ±0.33ms 5.00
- [mobile] Load: 327.67ms, ±2.33ms 5.00
- [mobile] FirstVisualChange: 300.50ms, ±0.50ms 5.00
- [mobile] SpeedIndex: 301.00ms, ±1.00ms 5.00
- [mobile] VisualComplete85: 300.50ms, ±0.50ms 5.00
- [mobile] CLS (Cumulative Layout Shift): 0.00ms, ±0.00ms 5.00
- [mobile] TBT (Total Blocking Time): 0.00ms, ±0.00ms 5.00
- [mobile] firstPaint: 306.67ms, ±0.33ms
- [mobile] LastVisualChange: 334.50ms, ±0.50ms
Yellow Lab Tools
4.35
Results collected at 2024-11-13
- The website has rather good frontend code. 4.35
- Network 5.00
- Images 4.80
- DOM complexity 4.85
- JS complexity 5.00
- Bad JS 5.00
- jQuery 5.00
- CSS complexity 2.50
- Bad CSS 2.40
- Web fonts 1.25
- Server config 5.00
Performance section:
- Number of iframes 5.00
- Total JS execution time 5.00
- DOM access 5.00
- Scroll events bound 5.00
- document.write calls 5.00
- Synchronous Ajax requests 5.00
- Rules count 1.25
- Total weight 5.00
- Gzip/Brotli compression 5.00
- File minification 5.00
- Requests number 5.00
- Different domains 5.00
- 404 not found 5.00
- Connections closed 5.00
- Identical content 5.00
- Below the fold images 5.00
- Webfonts number 1.00
- Overweighted webfonts 1.00
- WOFF 2 5.00
- HTTP protocols 5.00
- TLS protocols 5.00
- Caching disabled 5.00
- Caching not specified 5.00
- Caching too short 5.00
- Network 5.00
- Images 4.80
- DOM complexity 4.85
- JS complexity 5.00
- Bad JS 5.00
- jQuery 5.00
- CSS complexity 2.50
- Bad CSS 2.40
- Web fonts 1.25
- Server config 5.00
Performance section:
- Number of iframes 5.00
- Total JS execution time 5.00
- DOM access 5.00
- Scroll events bound 5.00
- document.write calls 5.00
- Synchronous Ajax requests 5.00
- Rules count 1.25
- Total weight 5.00
- Gzip/Brotli compression 5.00
- File minification 5.00
- Requests number 5.00
- Different domains 5.00
- 404 not found 5.00
- Connections closed 5.00
- Identical content 5.00
- Below the fold images 5.00
- Webfonts number 1.00
- Overweighted webfonts 1.00
- WOFF 2 5.00
- HTTP protocols 5.00
- TLS protocols 5.00
- Caching disabled 5.00
- Caching not specified 5.00
- Caching too short 5.00
Pa11y
5.00
Results collected at 2024-11-13
- The website do not have any apparent issues with accessibility!
Accessibility section:
- Number of types of issues: 0 5.00
- Number of issues: 0 5.00
Accessibility section:
- Number of types of issues: 0 5.00
- Number of issues: 0 5.00
Integrity & Security
3.38
Results collected at 2024-11-13
- About average privacy settings, but should get better.
Security section:
- HTTPS by default is good! 5.00
- Strict Transport Security is pretty bad. 1.00
- Content Security Policy is pretty bad. 1.00
- Reporting CSP Certificate Transparency Network Error Logging is good! 5.00
- Referrer Policy is good! 5.00
- Subresource Integrity SRI is pretty bad. 1.00
- HTTP headers is good! 5.00
- Cookies is ok, with 2 error(s) and 0 warning(s). 4.00
Security section:
- HTTPS by default is good! 5.00
- Strict Transport Security is pretty bad. 1.00
- Content Security Policy is pretty bad. 1.00
- Reporting CSP Certificate Transparency Network Error Logging is good! 5.00
- Referrer Policy is good! 5.00
- Subresource Integrity SRI is pretty bad. 1.00
- HTTP headers is good! 5.00
- Cookies is ok, with 2 error(s) and 0 warning(s). 4.00
Energy Efficiency
4.55
Results collected at 2024-11-13
- Webpage generates very little carbon dioxide!
- Carbon dioxide per pageview: 0.36 gram(s)
- More green than 91 % of the websites tested by webperf.se (Reference updated: 2024-03-31).
- More green than 91 % of the websites tested by webperf.se (Reference updated: 2022-12-16).
- Network transfer size: 589 kb 4.55
- Carbon dioxide per pageview: 0.36 gram(s)
- More green than 91 % of the websites tested by webperf.se (Reference updated: 2024-03-31).
- More green than 91 % of the websites tested by webperf.se (Reference updated: 2022-12-16).
- Network transfer size: 589 kb 4.55
Software
4.58
Results collected at 2024-11-13
- CMS used: episerver
- Web server used: microsoft-httpapi
- Technology used: asp.net, csharp, js, sass, scss, typescript
- Metadata used: canonical, icon, open-graph, preload, viewport
- Javascript libraries used: applicationinsights-js, bootstrap, jquery, plausible-analytics
- Languages found: en, en_us
- Image formats used: ico, jpg, png, svg, webp
Security section:
##### Software is behind >=10 versions 3.0
###### Introduction:
Software used is behind 10 or more version compared to latests.
This is a semi good indicator that you need to update to latest version.
It also indicate that you don't have a good package routine for your software.
You can fix this by updating software to latest version.
###### Detected software(s):
- bootstrap 5.0.2
- applicationinsights-js 2.8.18
###### Affected resource(s):
- https://optimizely.blog/js/jsbundle.js?v=7czMwn7jwxfukbjq_S6UilOBN9bqwmcEa_6UvS4jL1g
- https://az416426.vo.msecnd.net/scripts/b/ai.2.min.js
##### Software is behind >=1 versions 4.9
###### Introduction:
Software used is behind 1 or more version compared to latests.
This is a small indicator that you need to update to latest version.
You can fix this by updating software to latest version.
###### Detected software(s):
- jquery 3.6.0
###### Affected resource(s):
- https://optimizely.blog/
- https://optimizely.blog/js/jsbundle.js?v=7czMwn7jwxfukbjq_S6UilOBN9bqwmcEa_6UvS4jL1g
##### NO Common Vulnerabilities and Exposures found 5.00
##### Opensource software used seem to be maintained 5.00
##### You don't seem to be using 'END OF LIFE' software 5.00
- Web server used: microsoft-httpapi
- Technology used: asp.net, csharp, js, sass, scss, typescript
- Metadata used: canonical, icon, open-graph, preload, viewport
- Javascript libraries used: applicationinsights-js, bootstrap, jquery, plausible-analytics
- Languages found: en, en_us
- Image formats used: ico, jpg, png, svg, webp
Security section:
##### Software is behind >=10 versions 3.0
###### Introduction:
Software used is behind 10 or more version compared to latests.
This is a semi good indicator that you need to update to latest version.
It also indicate that you don't have a good package routine for your software.
You can fix this by updating software to latest version.
###### Detected software(s):
- bootstrap 5.0.2
- applicationinsights-js 2.8.18
###### Affected resource(s):
- https://optimizely.blog/js/jsbundle.js?v=7czMwn7jwxfukbjq_S6UilOBN9bqwmcEa_6UvS4jL1g
- https://az416426.vo.msecnd.net/scripts/b/ai.2.min.js
##### Software is behind >=1 versions 4.9
###### Introduction:
Software used is behind 1 or more version compared to latests.
This is a small indicator that you need to update to latest version.
You can fix this by updating software to latest version.
###### Detected software(s):
- jquery 3.6.0
###### Affected resource(s):
- https://optimizely.blog/
- https://optimizely.blog/js/jsbundle.js?v=7czMwn7jwxfukbjq_S6UilOBN9bqwmcEa_6UvS4jL1g
##### NO Common Vulnerabilities and Exposures found 5.00
##### Opensource software used seem to be maintained 5.00
##### You don't seem to be using 'END OF LIFE' software 5.00