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React – A JavaScript library for building user interfaces
https://reactjs.org/
2 high issues
6.1%
3 medium issues
9.1%
4 low issues
12.1%
24 tests passed
72.7%
0.14 seconds
23.44 kB
12 resources
Secure
Seo
Title
The title tag is perfect.
React – A JavaScript library for building user interfaces
Meta description
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Headings
The headings are properly set.
  1. React
  1. Declarative
  2. Component-Based
  3. Learn Once, Write Anywhere
  4. A Simple Component
  5. A Stateful Component
  6. An Application
  7. A Component Using External Plugins
  1. Loading code example...
  2. Loading code example...
  3. Loading code example...
  4. Loading code example...
Content keywords
The content has relevant keywords.
reactajavascriptlibraryforbuildinguser
Image keywords
There are 1 images with missing alt attributes.
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SEO friendly URL
The URL is SEO friendly.
https://reactjs.org/
404 page
The website has 404 error pages.
https://reactjs.org/404-a866c1038da24ca1933dacd9b027d59e
Robots.txt
The webpage can be accessed by search engines.
Noindex
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In-page links
The number of links on the webpage is okay.
Language
The webpage has the language declared.
en
Favicon
The webpage has a favicon.
https://reactjs.org/icons/icon-512x512.png?v=f4d46f030265b4c48a05c999b8d93791
Performance
Text compression
The HTML file is compressed.
Load time
The webpage loaded in 0.14 seconds.
Page size
The size of the HTML webpage is 23,440.00.
HTTP requests
There are fewer than 12 HTTP requests on the webpage.
  1. https://reactjs.org/polyfill-ecc6e43965b3d365850d.js
  2. https://reactjs.org/component---src-pages-index-js-f48f64c9a56f53f635a0.js
  3. https://reactjs.org/3e8f09252b6028beb8baf8cc63801156f5861675-a30b52c415707d90ab94.js
  4. https://reactjs.org/commons-a15c7dae9de9e56f811b.js
  5. https://reactjs.org/fc233f00-cba3d9005c3896f6d5d4.js
  6. https://reactjs.org/app-5352ab3aab21c038a62f.js
  7. https://reactjs.org/framework-ff9c508ebfda0f33cb0b.js
  8. https://reactjs.org/styles-fb708593b484b04b1765.js
  9. https://reactjs.org/webpack-runtime-9d09a45e3e757fb2faf0.js
  10. https://unpkg.com/docsearch.js@2.4.1/dist/cdn/docsearch.min.js
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  2. 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Image format
There are 2 images that are not using the AVIF, WebP format.
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JavaScript defer
The are 10 javascript resources without the defer attribute.
  1. https://reactjs.org/polyfill-ecc6e43965b3d365850d.js
  2. https://reactjs.org/component---src-pages-index-js-f48f64c9a56f53f635a0.js
  3. https://reactjs.org/3e8f09252b6028beb8baf8cc63801156f5861675-a30b52c415707d90ab94.js
  4. https://reactjs.org/commons-a15c7dae9de9e56f811b.js
  5. https://reactjs.org/fc233f00-cba3d9005c3896f6d5d4.js
  6. https://reactjs.org/app-5352ab3aab21c038a62f.js
  7. https://reactjs.org/framework-ff9c508ebfda0f33cb0b.js
  8. https://reactjs.org/styles-fb708593b484b04b1765.js
  9. https://reactjs.org/webpack-runtime-9d09a45e3e757fb2faf0.js
  10. https://unpkg.com/docsearch.js@2.4.1/dist/cdn/docsearch.min.js
DOM size
The DOM size is optimal.
The HTML file has 304 DOM nodes.
Security
HTTPS encryption
The webpage uses HTTPS encryption.
The HTML file has https://reactjs.org/ DOM nodes.
Mixed content
There are no mixed content resources on the webpage.
Server signature
The webpage has a public server signature.
Vercel
Unsafe cross-origin links
The webpage has 1 unsafe cross-origin links.
Plaintext email
The webpage does not contain any plaintext emails.
Miscellaneous
Structured data
The webpage has structured data.
    Meta viewport
    The webpage has a meta viewport tag set.
    width=device-width, initial-scale=1.0
    Character set
    The webpage has a charset value set.
    utf-8
    Sitemap
    No sitemaps found.
    Social
    The webpage has 2 social links.
    Content length
    The webpage has 978 words.
    Text to HTML ratio
    The text to HTML ratio is under 10%
    The text to HTML ratio is 9%.
    Inline CSS
    The webpage contains inline CSS code.
    1. outline:none
    2. position:relative
    3. position:absolute;top:0;width:1px;height:1px;padding:0;overflow:hidden;clip:rect(0, 0, 0, 0);white-space:nowrap;border:0
    Deprecated HTML
    There are no deprecated HTML tags on the webpage.