Javascript: how to replace multiple spaces with single

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In input i write any sentence with multiple spaces,after clicking on Space Remover button,i need to replace that multiple spaces with single and show it in h1 tag.

What I have tried:

I have tried like this, but it's not working.

<input id="bar" type="text" placeholder="Type a sentence...">
		<button onclick="spaceremover()">Space Remover</button>
		<h1 id="result1"></h1>


function spaceremover(){
	var a = document.getElementById("bar").value;
	for(var i = 0; i < a.length;i++){
	a.replace(/\s/g, ' ');	
	}
	document.getElementById("result1").innerHTML = a;
}

Posted 15-Jul-18 23:45pm

Suren97

Updated 16-Jul-18 23:12pm

v2

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3 solutions

Solution 1

you can use

.replace(/\d+/, '')

or

.split('/\d+/').join(' ')

.split('  ').join(' ')

or

str.replace( /\s\s+/g, ' ' )

or

var str = "       Hello World!       ";
   alert(str.trim());

and this one most used in this case

myStr.replace(/  +/g, ' ')

it would be worthful.

Posted 16-Jul-18 0:13am

ajitjha347

Updated 16-Jul-18 0:16am

v2

Comments

Suren97 16-Jul-18 6:27am

It doesn't work. I think the problem is in loop or another.

Solution 3

var myStr = 'The     quick   brown  fox';
    alert(myStr);  // Output 'The     quick   brown  fox'
    
    var newStr = myStr.replace(/  +/g, ' ');
    alert(newStr);  // Output 'The quick brown fox'

document.getElementById("result1").innerHTML = newStr;

Posted 16-Jul-18 23:12pm

Raju Barigela

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Jochen Arndt · Accepted Answer · 2018-07-16T00:23:00

Your regex replaces only single white space characters (\s) with a single space. To match sequences of multiple spaces, you have to specify that by appending a + (match one or more occurences) or {2,} (match two or more occurences).

There is also no need to use a loop when using the regex global option.

Finally, the String.prototype.replace() - JavaScript | MDN[^] function returns a new string where the replacement has been performed but does not alter the original string

So use (untested):

JavaScript

function spaceremover(){
    var a = document.getElementById("bar").value;
    document.getElementById("result1").innerHTML = a.replace(/\s{2,}/g, ' ');
}