Nodejs String Empty Check isEmpty()

Method Source Code

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

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

Related

1. isNullOrWhitespace(input)

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

2. isEmpty()

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

3. isEmpty()

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

4. isEmpty()

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

5. isEmpty()

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

6. isEmpty()

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

7. isEmpty()

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

8. isEmpty()

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

9. isEmpty()

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