remove whitespace from string javascript

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

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

.replace(/ /g,'')

var str = "  Some text ";
str.trim();

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

//Removing whitespace from String
 var str = "       Hello World!        ";
console.log(str.trim());
 

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

return str.replace(/\s/g, '');

var puzzle1=myTrim($("#puzzleinput").val());
            function myTrim(x) {
              return x.replace(/^\s+|\s+$/gm,'');
            }