Nodejs String Empty Check isNullOrWhitespace()

Method Source Code

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

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

4. isNullOrEmptyString(obj)

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

5. isNullOrWhitespace(input)

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

6. isEmpty()

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

7. isEmpty()

   String.prototype.isEmpty = function() {
       return (this.length === 0 || !this.trim());
   };
   

8. isEmpty()

   "use strict";
   String.prototype.isEmpty = function() {
       return (this.length === 0 || !this.trim());
   };