.trim() in JavaScript not working in IE

jQuery:

$.trim( $("#mycomment").val() );

Someone uses $("#mycomment").val().trim(); but this will not work on IE.

Add the following code to add trim functionality to the string.

if(typeof String.prototype.trim !== 'function') {
  String.prototype.trim = function() {
    return this.replace(/^\s+|\s+$/g, ''); 
  }
}

It looks like that function isn't implemented in IE. If you're using jQuery, you could use $.trim() instead (although is has been deprecated as of jQuery 3.5).