Nodejs String Empty Check isEmpty()

Method Source Code

String.prototype.isEmpty = function () {
   "use strict";//from  w ww  .ja v  a  2 s  .c o m
   return (this.length === 0 || !this.trim());
};

Related

1. isEmpty()

   String.prototype.isEmpty = function() {
       return this == null || this == '';
   };
   RegExp.escape = function(val) {
       return val.replace(/[\-\[\]{}()*+?.,\\\^$|#\s]/g, "\\$&");
   };
   

2. isEmpty()

   String.prototype.isEmpty = function() { 
     return (!this.length) 
   

3. isEmpty()

   String.prototype.isEmpty = function() {
     return this.toString().trim() == "";
   };
   

4. isEmpty()

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

5. isEmpty()

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

6. isEmpty()

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

7. isEmpty()

   String.prototype.isEmpty = function () {
     return (!this || this == "[object Null]" || this == "" || this == "undefined");
   

8. isEmpty()

   String.prototype.isEmpty = function() {
     return this.trim() === "";
   

9. isEmpty()

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