To remove all whitespace from a string, call the `replace()` method, passing it a regular expression that matches all whitespace characters and an empty string as replacement. For example, `str.replace(/\s/g, '')` returns a new string with all whitespace removed.

Remove all Whitespace from a String in JavaScript


## Remove all Whitespace from a String

**To remove all whitespace from a string, call the `replace()` method, passing
it a regular expression that matches all whitespace characters and an empty
string as replacement. For example, `str.replace(/\s/g, '')` returns a new
string with all whitespace removed.**

```javascript:index.js
const str = ' A   B   C    D ';

const noWhitespace = str.replace(/\s/g, '');
console.log(noWhitespace); // 👉️ 'ABCD'
```

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The first parameter we passed to the
[String.replace](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/replace)
method is a regular expression.

The `\s` metacharacter matches `spaces`, `tabs` and `newlines`.

We use the `g` (global) flag to specify that we want to match all occurrences of
whitespace characters in the string, not just the first occurrence.

The second parameter the `replace` function takes is the replacement. In our
case we want to replace all whitespace with an empty string (nothing).

<Alert>
  Note that the <code>String.replace</code> method does not change the original
  string, it returns a new string. Strings are immutable in JavaScript.
</Alert>

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Remove all Whitespace from a String in JavaScript

Remove all Whitespace from a String #

Borislav Hadzhiev

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Remove all Whitespace from a String in JavaScript