Browser support
u-elements
is committed to provide great support for all users and technologies, including older browser versions.
Based on up-to-date statistics from caniuse.com, u-elements
currently support 99.24% of all users on Chrome, Edge, Firefox, Firefox for Android, Opera, Safari, Safari on iOS, and Samsung Internet.
Minimum requirements
Browser version | Release date |
---|---|
Chrome 54+ | October 2016 |
Edge 79+ | January 2020 |
Firefox 63+ | October 2018 |
Firefox for Android 140+ | June 2025 |
Opera 41+ | October 2016 |
Safari 10.1+ | March 2017 |
Safari on iOS 10.3+ | March 2017 |
Samsung Internet 6.2+ | October 2017 |
Web features in use
u-elements
tracks browser support by monitoring the web features it uses. This is done by analyzing source code with JSHint and cross-referencing the identified features against MDN Browser Compatibility Data and caniuse.com usage statistics.
Here are the web features used by u-elements
that are not yet fully supported by all browsers:
Feature | Browser support |
---|---|
Window.customElements | 99.24% |
:host | 99.24% |
:host() | 99.24% |
Node.getRootNode | 99.25% |
ShadowRoot.mode | 99.27% |
Element.attachShadow | 99.27% |
ShadowRoot.activeElement | 99.27% |
Element.slot | 99.27% |
Event.composed | 99.34% |
Node.isConnected | 99.38% |
Object.entries | 99.49% |
Element.append | 99.50% |
Element.prepend | 99.50% |
KeyboardEvent.key | 99.56% |
Element.shadowRoot | 99.57% |
:scope | 99.70% |
Array.includes | 99.73% |
Array.of | 99.77% |
Object.assign | 99.77% |
Array.find | 99.77% |
Array.from | 99.77% |
Array.findIndex | 99.77% |
Event.isTrusted | 99.81% |
KeyboardEvent.repeat | 99.83% |
Element.closest | 99.83% |
String.repeat | 99.83% |
String.startsWith | 99.83% |
Object.getOwnPropertySymbols | 99.87% |
Array.keys | 99.87% |
Number.isNaN | 99.87% |
Number.parseFloat | 99.87% |
Number.isFinite | 99.87% |
Element.remove | 99.88% |
MutationObserver.disconnect | 99.89% |
MutationObserver.observe | 99.89% |
MutationObserver.takeRecords | 99.89% |
Element.insertAdjacentElement | 99.90% |
HTMLElement.innerText | 99.90% |