When you need to strip whitespace from a JavaScript string, you can use the String.trim() method, which allows you to remove whitespaces before and after the string.
Here’s an example of trim() in action:
let str = " Hello World! ";
let trimStr = str.trim();
console.log(trimStr); // "Hello World!"
The trim() method doesn’t accept any parameter, and it only removes whitespace on either side of the string:
let str = " Hello Wo rld! ";
let trimStr = str.trim();
console.log(trimStr); // "Hello Wo rld!"
If you want to remove whitespaces from between the characters too, you need to the combination of the split() and join() methods to your string as follows:
let str = " Hello Wo rld! ";
let trimStr = str.split(' ').join('');
console.log(trimStr); // "HelloWorld!"
Or you can also use the String.replace() method that uses a regular expression to search whitespaces and replace them with empty string('').
Here’s how you do it:
let str = " Hello Wo rld! ";
let trimStr = str.replace(/\s+/g, '');
console.log(trimStr); // "HelloWorld!"
The /\s+/g regex pattern will match all whitespace characters, and the replace() method will do the removal.
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