JavaScript String replaceAll()

Definition and usage

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

replaceAll() This method returns a new string with all matches replaced.

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

replaceAll() This method was introduced in JavaScript 2021.

replaceAll() This 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 a 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)

Parameter

Return value