javascript multiple replace in one line 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."

Example 3: multiple replace

var str = '[T] and [Z] but not [T] and [Z]';
var result = str.replace('T',' ').replace('Z','');
console.log(result);