Nodejs String Empty Check isNullOrEmpty()

Method Source Code

/**/*  www  .ja  va2  s.  c o m*/
 * Javascript String Extensions 
 * https://github.com/ugurhasar/StringExtensionsJS
 *
 * @author: twitter.com/ugurhasar
 *
 * Copyright (c) 2014 Ugur Hasar
 */

String.prototype.isNullOrEmpty = function () {
  return this === null || this.length === 0;
};

Related

1. isNullOrEmpty()

   String.prototype.isNullOrEmpty = function() {
     return (!this || 0 === this.length || /^\s*$/.test(this));  
   };
   

2. isNullOrEmpty()

   String.prototype.isNullOrEmpty = function(){
       return !(this && this.length > 0);
   };
   

3. isNullOrEmptyString(obj)

   function isNullOrEmptyString(obj) {
     if (isNullOrUnderdefined(obj))
       return false;
     if (isStringType(obj)) {
       return obj.length == 0;
     return false;
   

4. isNullOrWhitespace()

   String.prototype.isNullOrWhitespace = function () {
     return this === null || this.replace(/\s/g, '').length === 0;
   };
   

5. isNullOrWhitespace(input)

   String.isNullOrWhitespace = function( input ) {
     return !input || !input.trim();
   };
   

6. isEmpty()

   String.prototype.isEmpty = function() {
     return this == '';
   };