HTML DOMTokenList supports() Method
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Definition and Usage
If the token in the DOMTokenList is one of the attribute-supported tokens, the supports() method returns true.
Example
Example 1
Check if "allow-forms" is supported:
const list = element.sandbox;
list.supports("allow-forms");
Example 2
Check if "allow-nonsense" is supported:
const list = element.sandbox;
list.supports("allow-nonsense");
Syntax
domtokenlist.supports(Token)
Parameter
| Parameter | Description | Token | Required. The tag to be checked. |
|---|
Return Value
| Type | Description |
|---|---|
| Boolean Value | If the tag is supported, it returns true; otherwise, it returns false. |
Browser Support
domtokenlist.supports() is a DOM Level 4 (2015) feature.
It is supported by all browsers:
| Chrome | Edge | Firefox | Safari | Opera |
|---|---|---|---|---|
| Chrome | Edge | Firefox | Safari | Opera |
| Support | Support | Support | Support | Support |
Internet Explorer 11 (or earlier versions) does not support domtokenlist.supports().
Related Pages
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