Using the Trim String Method in JavaScript

Vaibhav Tandon

It’s always helpful to have an easy method method on strings to remove trailing or leading whitespace and the trim() method available on JavaScript strings is here to help us with doing exactly that.

Whitespace can anything such as spaces, tabs, no-break spaces, LF (line feeds), CR (carriage returns), etc.

Let’s quickly go over how to use it.

String.trim()

The String.trim method is used to remove the whitespace from both ends of a string.

  • Parameters: It does not accept any parameter.
  • Return type: It returns the string without whitespace.

An example of how to use it is shown below πŸ™ˆ

let reptilianString = "     🐊🐊🐊🐊     ";

console.log(reptilianString.trim());

// 🐊🐊🐊🐊

If we want to remove the whitespace only from the front but not from rear or vice-versa, we can also use the following methods.

  • trimStart()
  • trimEnd()

trimStart()

The trimStart() method is used to remove whitespace from the start of a string.

  • Parameters: It does not accept any parameter.
  • Return type: It returns the string without whitespace at the start.

Note: trimLeft() is an alias for trimStart()

trimEnd()

The trimEnd() method is used to remove the whitespace from the right end of the string.

Parameters: It does not accept any parameter. Return type: It returns the string without whitespace on the right end.

Note: trimRight() is an alias for trimEnd()

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