How to remove whitespace from a string in JavaScript?

anc4mfc.js

// Remove all whitespace
function delWS1(str) {
  return str.replace(/\s/g,"");
}

// Remove trailing and leading whitepsace
function delWS2(str) {
  return str.replace(/^[ ]+|[ ]+$/g,'');
}

// Remove trailing and leading whitepsace with built in prototype trim
function delWS3(str) {
  return str.trim();
}

console.log(delWS1("! Hello World !")) // --> "!HelloWorld!"
console.log(delWS2("  Hello World  ")) // --> "Hello World"
console.log(delWS3("  Hello World  ")) // --> "Hello World"