Remove whitespace in a string with JavaScript

Simply You can do this,

let str = ' aaa aa '; str = str.replace(/\s+/g,''); console.log(str);

Hope this code will help you

var str = " this is a sample " var res = str.replace(/ /g, ""); console.log(res); O/P - 'thisisasample' 

You can do this with a regex before passing it to the palindrome function:

'race car'.replace(/\s+/, "") 

'race car' can also be replaced by any variable containing your string.

You can try this:

word = word.replace(/\s+/g, " ").trim(); 

It will remove the spaces from the front and the back as well.

Hope, this helps:

function palindrome(str) { str = str.replace(/\s+/g, ''); // Delete whitespaces. return str.split('') // Convert the string into an array. .reverse() .join('') === str; // Convert the array into the string. } console.log(palindrome("race car"));

 var len = word.length; 

get the len after word change not before;

function palindrome(word) { word = word.replace(/ +/g, ""); var len = word.length; for (var i = 0; i < Math.floor(len / 2); i++) { if (word[i] !== word[len - 1 - i]) { return "FALSE"; } } return "TRUE"; } console.log(palindrome("race car"))

and

 word = word.replace(/ +/g, ""); 

suggest use regular expression:

 word = word.replace(/\s+/g, ""); 

You are taking len before removing white spaces. So the last element you were asking returning undefined, that's result in no match and FALSE output.

Try following snippet:

 function palindrome(word) { word = word.replace(/ +/g, ""); var len = word.length; for (var i = 0; i < Math.floor(len/2); i++ ) { if (word[i] !== word[len - 1 - i]) { return "FALSE"; } } return "TRUE"; } console.log(palindrome("race car"))

Please use the following code to remove space between two words.

word = word.replace(/\s/g, '')); 

You can try this.

replace(/\s+/, " ") 

Why are they all using the arcane regex syntax when you can simply do:

word = word.replace(' ', '');