check whitespace in javascript

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

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

if (/\s/.test(str)) {
    // It has any kind of whitespace
}

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

 Whitespace is empty space (without any visual representation)
 on screen. Examples of whitespace characters include 
 space characters, tabs, and line break characters.