DOMStringList: contains() method - Web APIs | MDN (original) (raw)
Baseline
Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
Note: This feature is available in Web Workers.
The contains() method returns a boolean indicating whether the given string is in the list.
Syntax
Parameters
A string you want to check for the existence of in the list.
Return value
A boolean indicating whether the given string is in the list.
Exceptions
Thrown if no argument is provided.
Specifications
| Specification |
|---|
| HTML # dom-domstringlist-contains |