JavaScript String replaceAll()
Examples
text = text.replaceAll("Cats","Dogs");
text = text.replaceAll("cats","dogs");
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text = text.replaceAll(/Cats/g,"Dogs");
text = text.replaceAll(/cats/g,"dogs");
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More example below.
Description
The replaceAll() method searches a string for a value or a regular expression.
The replaceAll() method returns a new string with all values replaced.
The replaceAll() method does not change the original string.
The replaceAll() method was introduced in JavaScript 2021.
The replaceAll() method does not work in Internet Explorer.
Note
If the parameter is a regular expression, the global flag (g) must be set, otherwise a TypeError is thrown.
Read more about regular expressions in our:
Syntax
string.replaceAll(searchValue, newValue)
Parameters
| Parameter | Description |
| searchValue | Required. The value, or regular expression, to search for. |
| newValue | Required. The new value (to replace with). This parameter can be a JavaScript function. |
Return Value
| Type | Description |
| A string | A new string where the search values has been replaced. |
More Examples
A 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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A function to return the replacement 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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