DOMTokenList 介面表示了一個以空格作為分隔的內容集,通常來自 Element.classListHTMLLinkElement.relList (en-US)HTMLAnchorElement.relList (en-US) 或 HTMLAreaElement.relList (en-US) 等屬性。本介面與 Array 同樣是由 0 開始索引,且 DOMTokenList 是區分大小寫的。


This interface doesn't inherit any property.

DOMTokenList.length (en-US) Read only
Is an integer representing the number of objects stored in the object.


This interface doesn't inherit any method.

DOMTokenList.item() (en-US)
Returns an item in the list by its index (or undefined if the number is greater than or equal to the length of the list, prior to Gecko 7.0 returned null)
DOMTokenList.contains() (en-US)
Returns true if the underlying string contains token, otherwise false
DOMTokenList.add() (en-US)
Adds token to the underlying string
DOMTokenList.remove() (en-US)
Removes token from the underlying string
DOMTokenList.replace() (en-US)
Replaces an existing token with a new token.
DOMTokenList.supports() (en-US)
Returns true if a given token is in the associated attribute's supported tokens.
DOMTokenList.toggle() (en-US)
Removes token from string and returns false. If token doesn't exist it's added and the function returns true


Specification Status Comment
The definition of 'DOMTokenList' in that specification.
Living Standard Initial definition


We're converting our compatibility data into a machine-readable JSON format. This compatibility table still uses the old format, because we haven't yet converted the data it contains. Find out how you can help! (en-US)
Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support (Yes) (Yes) 10 (Yes) (Yes)
Feature Android Android Webview Firefox Mobile (Gecko) IE Phone Opera Mobile Safari Mobile Chrome for Android
Basic support ? (Yes) ? ? ? ? (Yes)