How to Trim a String in JavaScript - Step by Step Examples

How to Trim a String in JavaScript ?

To trim a string in JavaScript, you can use the trim() method of the String class.

In this example,

We create a string named str1 with a value of " Hello World ".
We then use the trim() method on str1 to remove leading and trailing whitespace characters.
Finally, we print the trimmed string.

let str1 = "   Hello World   ";
let trimmedStr1 = str1.trim();
console.log(`Trimmed string is: '${trimmedStr1}'`);

Trimmed string is: 'Hello World'

In this example,

We create a string named str2 with a value of " apple".
We then use the replace() method with a regular expression to remove leading whitespace characters.
Finally, we print the trimmed string.

let str2 = "   apple";
let trimmedStr2 = str2.replace(/^\s+/, '');
console.log(`Trimmed string is: '${trimmedStr2}'`);

Trimmed string is: 'apple'

In this example,

We create a string named str3 with a value of "banana ".
We then use the replace() method with a regular expression to remove trailing whitespace characters.
Finally, we print the trimmed string.

let str3 = "banana   ";
let trimmedStr3 = str3.replace(/\s+$/, '');
console.log(`Trimmed string is: '${trimmedStr3}'`);

Trimmed string is: 'banana'

In this tutorial, we learned How to Trim a String in JavaScript language with well detailed examples.