​x
 
<!DOCTYPE html>
<html>
<body>
​
<h2>JavaScript String.trim()</h2>
​
<p>Click the button to alert the string with removed whitespace.</p>
​
<button onclick="myFunction()">Try it</button>
​
<script>
function myFunction() {
  let text = "     Hello World!     ";
  alert(text.trim());
}
</script>
​
</body>
</html>