DOMTokenList.replace

The replace() method of the DOMTokenList interface replaces an existing token with a new token.

Syntax

tokenList.replace(oldToken,newToken);

Parameters

oldToken

A DOMString representing the token you want to replace.

newToken

A DOMString representing the token you want to replace oldToken with.

Return value

A boolean value — true if the token was replaced successfully, and false if not.

Examples

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 c"></span>

Now the JavaScript:

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

var result = classes.replace("c", "z");
console.log(result);

if(result) {
  span.textContent = classes;
} else {
  span.textContent = 'token not replaced successfully';
}

The output looks like this:

Specifications

Browser compatibilityUpdate compatibility data on GitHub