The toggle() method of the DOMTokenList interface removes a given token from the list and returns false. If token doesn't exist it's added and the function returns true.


tokenList.toggle(token [, force]);


A DOMString representing the token you want to toggle.
force Optional
A Boolean that, if included, turns the toggle into a one way-only operation. If set to false, then token will only be removed, but not added. If set to true, then token will only be added, but not removed.

Return value

A Boolean indicating whether token is in the list after the call.


In the following example we retrieve the list of classes set on a <span> element as a DOMTokenList using Element.classList. We then replace a token in the list, and write the list into the <span>'s Node.textContent.

First, the HTML:

<span class="a b">classList is 'a b'</span>

Now the JavaScript:

let span = document.querySelector("span");
let classes = span.classList;

span.addEventListener('click', function() {
  let result = classes.toggle("c");

  if (result) {
    span.textContent = `'c' added; classList is now "${classes}".`;
  } else {
    span.textContent = `'c' removed; classList is now "${classes}".`;

The output looks like this:


Specification Status Comment
The definition of 'toggle()' in that specification.
Living Standard Initial definition

Browser compatibility

Update compatibility data on GitHub
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
toggleChrome Full support 8Edge Full support 12Firefox Full support YesIE Full support 10Opera Full support YesSafari Full support 5.1WebView Android Full support 3Chrome Android Full support 18Firefox Android Full support YesOpera Android Full support YesSafari iOS Full support 5.1Samsung Internet Android Full support 1.0
force argumentChrome Full support YesEdge Full support ≤18Firefox Full support YesIE No support NoOpera Full support YesSafari Full support 6.1WebView Android Full support YesChrome Android Full support YesFirefox Android ? Opera Android Full support YesSafari iOS Full support 6.1Samsung Internet Android Full support Yes


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