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JavaScript String replace() Method

Replace Microsoft:

let text = "Visit Microsoft!";
let result = text.replace("Microsoft", "W3Schools");

A global replacement:

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

More examples below.

The replace() method searches a string for a value or a regular expression.

The replace() method returns a new string with the value(s) replaced.

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

If you replace a value, only the first instance will be replaced. To replace all instances, use a regular expression with the g modifier set.

Read more about regular expressions in our:

• RegExp Tutorial
• RegExp Reference

The replaceAll() Method - replaces all matches

string.replace(searchValue, newValue)

A global, case-insensitive replacement:

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

A function to return the replacement text:

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

replace() is an ECMAScript1 (JavaScript 1997) feature.

It is supported in all browsers:

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