how to remove spaces at the end of string js code example

Example 1: javascript remove all whitespaces

var spacesString= "Do I have spaces?"; 
var noSpacesString= myString.replace(/ /g,'');// "DoIhavespaces?"

Example 2: suppress spaces in front and in the end of a string javascript

var hello = '     Hello there!    ';

// returns "Hello there!"
hello.trim();