This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The supports()
method of the DOMTokenList
interface returns true
if a given token is in the associated attribute's supported tokens. This method is intended to support feature detection.
Syntax
var boolean = element.supports(token)
Parameters
token
- A
DOMString
containing the token to query for.
Returns
A Boolean
indicating whether the token was found.
Example
var iframe = document.getElementById('display');
if (iframe.sandbox.supports('an-upcoming-feature')) {
// support code for mystery future feature
} else {
// fallback code
}
if (iframe.sandbox.supports('allow-scripts')) {
// instruct frame to run JavaScript
// NOTE: this is well-supported, and just an example!
}
Specifications
Specification | Status | Comment |
---|---|---|
Credential Management Level 1 | Editor's Draft | Initial definition. |
Browser compatibility
Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari (WebKit) |
---|---|---|---|---|---|
Basic support | 50.0 | 49 (49) | No support | ? | ? |
Feature | Android | Android Webview | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile | Chrome for Android |
---|---|---|---|---|---|---|---|
Basic support | No support | 50.0 | 49.0 (49) | No support | No support | No support | 50.0 |