JavaScript String replaceAll()

Definition and usage

replaceAll() The method is used to search for a specified value or regular expression in a string.

replaceAll() The method returns a new string with all the matched values replaced.

replaceAll() The method does not change the original string.

replaceAll() The method was introduced in JavaScript 2021.

replaceAll() The method is not available in Internet Explorer.

Instance

Example 1

text = text.replaceAll("Cats","Dogs");
text = text.replaceAll("cats","dogs");

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Example 2

text = text.replaceAll(/Cats/g,"Dogs");
text = text.replaceAll(/cats/g,"dogs");

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Example 2

Global, case-insensitive replacement:

let text = "Mr Blue has a blue house and a blue car";
let result = text.replaceAll(/blue/gi, "red");

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Example 3

Use the function to return the replaced text:

let text = "Mr Blue has a blue house and a blue car";
let result = text.replaceAll(/blue|house|car/gi, function (x) {
  return x.toUpperCase();
});

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Syntax

string.replaceAll(searchValue, newValue)

Parameters

Return value