How to replace multiple spaces with single space in JavaScript

You can use the replace() method in JavaScript to replace multiple spaces in a string with a single space, like the following example:
 

How to replace multiple spaces with single space in JavaScript

var str = 'Welcom          to      StackHowTo.com!';

var str = str.replace(/  +/g, ' ');

alert(str);

Output:

Welcom to StackHowTo.com!

However, the difference is not noticeable if you display this string of characters on a web page, because browsers treat multiple spaces as one space, unless you keep spaces.
 
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