Remove all Whitespace from a String in JavaScript

Remove all Whitespace from a String #

Use the String.replace() method to remove all whitespace from a string, e.g. str.replace(/\s/g, ''). The replace() method will remove all whitespace characters by replacing them with an empty string.

Copied!
const str = ' A   B   C    D ';

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

The first parameter we passed to the String.replace method is a regular expression.

The \s metacharacter matches spaces, tabs and newlines.

The second parameter the replace() method takes is the replacement string.

For our purposes, we want to replace all whitespace characters with an empty string.

Alternatively, you can use the replaceAll() method.

Copied!
const str = ' A   B   C    D ';

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

The String.replaceAll method takes a string or a regular expression for the first parameter and a replacement string for the second.

However, if you only need to remove spaces from the string (excluding tabs and newlines), you can pass a string instead of a regex to the replaceAll() method.

Copied!
const str = ' A   B   C    D ';

const noWhitespace = str.replaceAll(' ', '');
console.log(noWhitespace); // 👉️ 'ABCD'

The replaceAll() method removes all spaces by replacing them with empty strings.

Note that this approach only removes the spaces (not the tabs and newlines) from the string.

Further Reading #

• Remove all Spaces from a String in JavaScript
• Replace all Numbers in a String using JavaScript
• Remove all Numbers from a String in JavaScript
• Remove Empty Strings from an Array in JavaScript
• Remove Empty String Values from an Object in JavaScript
• How to compare Strings in JavaScript
• How to get the Length of a String in JavaScript
• Check if Array contains Empty String in JavaScript
• Interpolate Variable in a String in JavaScript
• Check if letter in String is Uppercase or Lowercase in JS
• Check if String contains only Letters and Spaces in JS
• Check if String contains only Letters and Numbers in JS
• Remove all non-alphanumeric Characters from String in JS