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.
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.
js
replace(oldToken, newToken)
A boolean value, which is true
if oldToken
was successfully replaced, or false
if not.
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:
html
<span class="a b c"></span>
Now the JavaScript:
js
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:
Specification |
---|
DOM Standard # ref-for-dom-domtokenlist-replace① |
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
replace |
61 | 17 | 49 | No | 48 | 10.1 | 61 | 61 | 49 | 45 | 10.3 | 8.0 |
boolean_value |
67 | 18 | 61 | No | 54 | 12 | 67 | 67 | 61 | 48 | 12 | 9.0 |
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https://developer.mozilla.org/en-US/docs/Web/API/DOMTokenList/replace