regex replace multiple spaces with one js code example

Example 1: replace multiple spaces with single space javascript

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

Example 2: javascript replace multiple spaces with single space

var multiSpacesString="I  have     some big    spaces.";
var singleSpacesString=multiSpacesString.replace(/  +/g, ' ');//"I have some big spaces."