The trim() methods in JavaScript removes spaces and other whitespace characters from both ends of a string. It is supported in all modern browsers else you can add the trim() method to the String prototype object.
The \s represent whitespace characters while “\uFEFF” represents the zero-width no-break space.
''.trim || (String.prototype.trim = function() {
return this.replace(/^[\s\uFEFF]+|[\s\uFEFF]+$/g, '');
});