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, the token will only be removed but not added again. If set to true, the token will only be added but not removed again.

Return value

A Booleanfalse if the token is not in the list after the call, or true if the 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:

var span = document.querySelector("span");
var classes = span.classList;
span.onclick = function() {
  var 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

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support Yes12 Yes11 Yes Yes
force argument Yes Yes Yes No Yes Yes
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support Yes Yes ? Yes Yes Yes Yes
force argument Yes Yes ? ? Yes Yes Yes

Document Tags and Contributors

Contributors to this page: fscholz, jpmedley, joliss, rpuspana, Endyl, chrisdavidmills
Last updated by: fscholz,