Website review html5please.com
HTML5 Please - Use the new and shiny responsibly
Generated on March 18 2026 16:31 PM
Old data? UPDATE !
The score is 56/100
SEO Content
Title
HTML5 Please - Use the new and shiny responsibly
Length : 48
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Description
Look up HTML5, CSS3, etc features, know if they are ready for use, and if so find out how you should use them – with polyfills, fallbacks or as they are.
Length : 153
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Headings
| H1 | H2 | H3 | H4 | H5 | H6 |
| 1 | 99 | 96 | 97 | 0 | 0 |
- [H1] HTML5 Please
- [H2] Use the new and shiny responsibly. Look up HTML5, CSS3, etc features, know if they are ready for use, and if so find out how you should use them – with polyfills, fallbacks or as they are. tell me more When Can I Use tells you the browser support story, while Modernizr gives you the power of feature detection. HTML5 Please helps you out with recommendations for polyfills and implementation so you can decide if and how to put each of these features to use. The recommendations below represent the collective knowledge of developers who have been deep in the HTML5 trenches. We hope they serve you well. Read Divya's backstory about this site.
- [H2] Explore features
- [H2] <audio>
- [H2] background-image options
- [H2] border-image
- [H2] border-radius
- [H2] box-reflection
- [H2] box-shadow
- [H2] box-sizing
- [H2] calc()
- [H2] <canvas>
- [H2] classList
- [H2] ContentEditable
- [H2] CORS
- [H2] CSS Animations
- [H2] css filters
- [H2] css3 colors
- [H2] <datalist>
- [H2] dataset
- [H2] <details> & <summary>
- [H2] <dialog>
- [H2] DOM
- [H2] drag n drop
- [H2] ECMAScript 6 (and above)
- [H2] EventSource (Server-Sent Events)
- [H2] exclusions
- [H2] Fetch API
- [H2] File API
- [H2] FileSystem & FileWriter API
- [H2] fit-content
- [H2] flexbox
- [H2] @font-face
- [H2] font-feature-settings
- [H2] form validation
- [H2] FormData API
- [H2] fullscreen
- [H2] geolocation
- [H2] gradients
- [H2] grids
- [H2] history
- [H2] HTML5 elements
- [H2] hyphens
- [H2] iframe[sandbox]
- [H2] iframe[seamless]
- [H2] iframe[srcdoc]
- [H2] img[srcset]
- [H2] IndexedDB
- [H2] <input type=color>
- [H2] <input type=date>
- [H2] <input type=number>
- [H2] <input type=range>
- [H2] <input type=search>
- [H2] input[placeholder]
- [H2] Interaction media features
- [H2] JSON
- [H2] localStorage
- [H2] masks
- [H2] matchMedia
- [H2] media queries
- [H2] <menu>
- [H2] <meter>
- [H2] Microdata DOM API
- [H2] multicolumn
- [H2] multiple backgrounds
- [H2] offline
- [H2] ol[reversed]
- [H2] opacity
- [H2] paged media
- [H2] <picture>
- [H2] pointer events
- [H2] position:fixed
- [H2] position:sticky
- [H2] postMessage
- [H2] <progress>
- [H2] pseudo elements
- [H2] regions
- [H2] rem unit
- [H2] requestAnimationFrame
- [H2] <ruby>
- [H2] selectors
- [H2] style[scoped]
- [H2] @supports
- [H2] <svg>
- [H2] text-overflow
- [H2] text-shadow
- [H2] text-stroke
- [H2] <track>
- [H2] transforms
- [H2] transitions
- [H2] Vibration
- [H2] <video>
- [H2] Viewport units (vh, vw, vmin, vmax)
- [H2] Web Components
- [H2] Web Workers
- [H2] WebGL
- [H2] WebP
- [H2] WebSockets
- [H2] WebSQL DB
- [H2] No items met your search =(
- [H3] use with polyfill
- [H3] use with fallback
- [H3] use with fallback
- [H3] use
- [H3] avoid
- [H3] use
- [H3] use
- [H3] use with fallback
- [H3] use with polyfill
- [H3] use with polyfill
- [H3] use
- [H3] use with polyfill
- [H3] use
- [H3] caution
- [H3] use with fallback
- [H3] use with polyfill
- [H3] use with fallback
- [H3] use with polyfill
- [H3] caution with polyfill
- [H3] caution with polyfill
- [H3] caution with polyfill
- [H3] use with polyfill
- [H3] use with polyfill
- [H3] avoid
- [H3] use with polyfill
- [H3] use with polyfill
- [H3] avoid with polyfill
- [H3] avoid
- [H3] use
- [H3] use
- [H3] use
- [H3] use with polyfill
- [H3] caution
- [H3] caution with fallback
- [H3] use with fallback
- [H3] use with fallback
- [H3] caution
- [H3] use with fallback
- [H3] use with polyfill
- [H3] use
- [H3] use
- [H3] avoid
- [H3] use with polyfill
- [H3] use with fallback
- [H3] caution with fallback
- [H3] caution with polyfill
- [H3] caution with polyfill
- [H3] use with polyfill
- [H3] use
- [H3] use
- [H3] use
- [H3] caution with polyfill
- [H3] use with polyfill
- [H3] use
- [H3] caution
- [H3] use with polyfill
- [H3] use
- [H3] use with polyfill
- [H3] use with polyfill
- [H3] use with polyfill
- [H3] use
- [H3] use with fallback
- [H3] caution with fallback
- [H3] use with polyfill
- [H3] use
- [H3] avoid
- [H3] use with fallback
- [H3] use with fallback
- [H3] use
- [H3] caution with polyfill
- [H3] use
- [H3] use with polyfill
- [H3] use
- [H3] avoid
- [H3] use
- [H3] use with polyfill
- [H3] use with fallback
- [H3] use with fallback
- [H3] avoid
- [H3] caution
- [H3] use with polyfill
- [H3] use
- [H3] use
- [H3] avoid
- [H3] use with polyfill
- [H3] use with fallback
- [H3] use with fallback
- [H3] caution
- [H3] use with polyfill
- [H3] caution with fallback
- [H3] caution with polyfill
- [H3] use with fallback
- [H3] caution with fallback
- [H3] caution
- [H3] caution with polyfill
- [H3] avoid
- [H4] html
- [H4] css
- [H4] css
- [H4] css
- [H4] css
- [H4] css
- [H4] css
- [H4] css
- [H4] html
- [H4] api
- [H4] html
- [H4] html
- [H4] css
- [H4] css
- [H4] css
- [H4] html
- [H4] api
- [H4] html
- [H4] html
- [H4] api
- [H4] api
- [H4] js
- [H4] api
- [H4] css
- [H4] api
- [H4] api
- [H4] api
- [H4] css
- [H4] css
- [H4] css
- [H4] css
- [H4] html
- [H4] api
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- [H4] css
- [H4] api
- [H4] html
- [H4] css
- [H4] html
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- [H4] html
- [H4] api
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- [H4] html
- [H4] html
- [H4] css
- [H4] js
- [H4] api
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- [H4] html
- [H4] API
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- [H4] html
- [H4] css
- [H4] css
- [H4] css
- [H4] api
- [H4] html
- [H4] css
- [H4] When you sunset IE8 support, you can use:
- [H4] css
- [H4] css
- [H4] svg
- [H4] css
- [H4] css
- [H4] css
- [H4] html
- [H4] css
- [H4] css
- [H4] api
- [H4] html
- [H4] css
- [H4] api
- [H4] api
- [H4] api
- [H4] html
- [H4] api
- [H4] api
Images
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Good, most or all of your images have alt attributes.
Text/HTML Ratio
Ratio : 0%
This page's ratio of text to HTML code is below 15 percent, this means that your website probably needs more text content.
Flash
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Iframe
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SEO Links
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In-page links
We found a total of 399 links including 107 link(s) to files
| Anchor | Type | Juice |
|---|---|---|
| tell me more | Internal | Passing Juice |
| When Can I Use | External | Passing Juice |
| Modernizr | External | Passing Juice |
| polyfills | External | Passing Juice |
| about this site | External | Passing Juice |
| link to this search › | Internal | Passing Juice |
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| use | Internal | Passing Juice |
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| avoid | Internal | Passing Juice |
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| browser media codec support in 2018 | External | Passing Juice |
| mdn browser compatibility tables | External | Passing Juice |
| mediaelement.js | External | Passing Juice |
| Sound Manager 2 | External | Passing Juice |
| View browser share % | External | Passing Juice |
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| David Baron's border-image post | External | Passing Juice |
| View browser share % | External | Passing Juice |
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| * { Box-sizing: Border-box } FTW | External | Passing Juice |
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| classlist.js | External | Passing Juice |
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| simple proxy | External | Passing Juice |
| flXHR | External | Passing Juice |
| View browser share % | External | Passing Juice |
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| Polyfilter | External | Passing Juice |
| Learn more | External | Passing Juice |
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| varying levels | External | Passing Juice |
| graceful fallback | External | Passing Juice |
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| datalist-polyfill | External | Passing Juice |
| Relevant Dropdowns | External | Passing Juice |
| Edit this info | External | Passing Juice |
| HTML5 dataset support | External | Passing Juice |
| View browser share % | External | Passing Juice |
| Edit this info | External | Passing Juice |
| Internet Explorer or Edge | External | Passing Juice |
| Learn more | External | Passing Juice |
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| HTML 5.1 | External | Passing Juice |
| Google's polyfill | External | Passing Juice |
| tracked | External | Passing Juice |
| View browser share % | External | Passing Juice |
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| the DOM | External | Passing Juice |
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| ES6 compatibility table | External | Passing Juice |
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| consideration for Edge | External | Passing Juice |
| MDN web docs | External | Passing Juice |
| EventSource polyfill | External | Passing Juice |
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| Fetch API | External | Passing Juice |
| browser support | External | Passing Juice |
| fetch | External | Passing Juice |
| Learn more | External | Passing Juice |
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| FileReader | External | Passing Juice |
| moxie | External | Passing Juice |
| View browser share % | External | Passing Juice |
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| https://caniuse.com/#feat=filesystem | External | Passing Juice |
| idb.filesystem.js | External | Passing Juice |
| Edit this info | External | Passing Juice |
| View browser share % | External | Passing Juice |
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| CSS Tricks' A Complete Guide to Flexbox | External | Passing Juice |
| flexbox docs at MDN | External | Passing Juice |
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| Google Fonts | External | Passing Juice |
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| A Comprehensive Guide to Font Loading Strategies | External | Passing Juice |
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| hyperform | External | Passing Juice |
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| toQueryString() | External | Passing Juice |
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| sendAsBinary() | External | Passing Juice |
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| screenfull.js | External | Passing Juice |
| jQuery Fullscreen Plugin | External | Passing Juice |
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| final syntax | External | Passing Juice |
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| CSS Grid Layout | External | Passing Juice |
| css-tricks.com | External | Passing Juice |
| caniuse.com | External | Passing Juice |
| https://github.com/codler/Grid-Layout-Polyfill | External | Passing Juice |
| View browser share % | External | Passing Juice |
| Edit this info | External | Passing Juice |
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| pjax | External | Passing Juice |
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| HTML5 spec | External | Passing Juice |
| only Firefox does this | External | Passing Juice |
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| html5shiv-printshiv.js | External | Passing Juice |
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| CSS Text Level 3 | External | Passing Juice |
| Word wrapping/hyphenation using CSS | External | Passing Juice |
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| Modernizr has good support | External | Passing Juice |
| The Current State of Hyphenation on the Web | External | Passing Juice |
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| this srcdoc polyfill | External | Passing Juice |
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| polyfill | External | Passing Juice |
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| IndexedDB Polyfill | External | Passing Juice |
| IDBWrapper | External | Passing Juice |
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| Spectrum | External | Passing Juice |
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| Number polyfill | External | Passing Juice |
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| Input Range Polyfill | External | Passing Juice |
| rangeslider.js | External | Passing Juice |
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| search input | External | Passing Juice |
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| Placeholder jQuery Plugin | External | Passing Juice |
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| Media Queries Level 4 Working Draft | External | Passing Juice |
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| JSON | External | Passing Juice |
| Douglas Crockford | External | Passing Juice |
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| race condition | External | Passing Juice |
| to stop advocating for and building examples that use it | External | Passing Juice |
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| sessionstorage | External | Passing Juice |
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| Masks Working Draft | External | Passing Juice |
| SVG-based fallbacks | External | Passing Juice |
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| MatchMedia.js | External | Passing Juice |
| this fork | External | Passing Juice |
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| Respond.js | External | Passing Juice |
| mobile first approach | External | Passing Juice |
| separate stylesheet for IE to help with this | External | Passing Juice |
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| contextMenu | External | Passing Juice |
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| meter-polyfill | External | Passing Juice |
| jQuery shim | External | Passing Juice |
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| microdata shim | External | Passing Juice |
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| completely ignored | External | Passing Juice |
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| Louis's ol[reversed] post | External | Passing Juice |
| ol reversed polyfill | External | Passing Juice |
| HTML5 reverse ordered lists | External | Passing Juice |
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| Edit this info | External | Passing Juice |
| View browser share % | External | Passing Juice |
| Edit this info | External | Passing Juice |
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| support | External | Passing Juice |
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| modernizr plugin | External | Passing Juice |
| View browser share % | External | Passing Juice |
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| except mobile, which is described at length here | External | Passing Juice |
| messy feature detect | External | Passing Juice |
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| This Mozilla presentation video | External | Passing Juice |
| CSS Positioned Layout Module Level 3 W3C Working Draft | External | Passing Juice |
| Stickyfill | External | Passing Juice |
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| EasyXDM | External | Passing Juice |
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| Cross Browser HTML5 Progress Bars In Depth | External | Passing Juice |
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| this post by Johnathan Snook | External | Passing Juice |
| caniuse | External | Passing Juice |
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| requestAnimationFrame is recommended | External | Passing Juice |
| requestAnimationFrame polyfill | External | Passing Juice |
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| Cross-browser Ruby | External | Passing Juice |
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| Selectivizr | External | Passing Juice |
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| Scoped stylesheets | External | Passing Juice |
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SEO Keywords
Keywords Cloud
Keywords Consistency
| Keyword | Content | Title | Keywords | Description | Headings |
|---|
Usability
Url
Domain : html5please.com
Length : 15
Favicon
Great, your website has a favicon.
Printability
We could not find a Print-Friendly CSS.
Language
Good. Your declared language is en.
Dublin Core
This page does not take advantage of Dublin Core.
Document
Doctype
HTML 5
Encoding
Perfect. Your declared charset is UTF-8.
W3C Validity
Errors : 0
Warnings : 0
Email Privacy
Great no email address has been found in plain text!
Deprecated HTML
Great! We haven't found deprecated HTML tags in your HTML.
Speed Tips
 |
Excellent, your website doesn't use nested tables. |
|
Perfect. No inline css has been found in HTML tags! |
|
Great, your website has few CSS files. |
|
Perfect, your website has few JavaScript files. |
|
Perfect, your website takes advantage of gzip. |
Mobile
Mobile Optimization
|
Apple Icon |
|
Meta Viewport Tag |
|
Flash content |
Optimization
XML Sitemap
Missing
Your website does not have an XML sitemap - this can be problematic.
A sitemap lists URLs that are available for crawling and can include additional information like your site's latest updates, frequency of changes and importance of the URLs. This allows search engines to crawl the site more intelligently.
Robots.txt
https://html5please.com/robots.txt
Great, your website has a robots.txt file.
Analytics
Great, your website has an analytics tool.
Google Analytics |
PageSpeed Insights
Device
Categories
Free SEO Testing Tool
Free SEO Testing Tool is a free SEO tool which provides you content analysis of the website.