DOMTokenList: replace() method
Baseline
Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since April 2018.
The replace() method of the DOMTokenList interface
replaces an existing token with a new token.
If the first token doesn't exist, replace() returns false immediately,
without adding the new token to the token list.
Syntax
replace(oldToken, newToken)
Parameters
Return value
A boolean value, which is true if oldToken was
successfully replaced, or 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:
const span = document.querySelector("span");
const classes = span.classList;
const result = classes.replace("c", "z");
span.textContent = result ? classes : "token not replaced successfully";
The output looks like this:
Specifications
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| DOM # ref-for-dom-domtokenlist-replace① |
Browser compatibility
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return()'s value is a boolean, not void as it used to be.
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Legend
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- Full support
- Full support