Nodejs String Empty Check isBlank()

Method Source Code

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

Related

1. isEmpty()

   String.prototype.isEmpty = function(){
       if(typeof this !== 'string') {
           if(typeof this === 'object' && !(this instanceof String)){
               throw {
                   name: 'InvalidType',
                   message: 'The current type is not a String'
       return this.length === 0;
   };
   

2. isEmpty()

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

3. isEmpty(pattern)

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

4. isEmpty(str)

   String.isEmpty = function(str){
       if(typeof str === 'string'){
           str = str.trim();
       switch(str){
           case "":
           case 0:
           case null:
           case false:
   ...
   

5. isBlank()

   String.prototype.isBlank = function() { 
     return !this.match(/\S/) 
   

6. isBlank()

   String.prototype.isBlank = function() {
       return (this==null || this=="");
   

7. isBlank()

   String.prototype.isBlank = function (){
     var str = $.trim(this);
     if(str == "") {
       return true;
     } else {
       return false;
   

8. isBlank()

   String.prototype.isBlank = function() {
       if (this.trim().length == 0)
           return true;
       else
           return false;
   };
   Date.prototype.toLocalDate = function() {
       var localTime = this.getTime();
       var localOffset = this.getTimezoneOffset() * 60000;
   ...
   

9. isBlank()

   String.prototype.isBlank = function() {
       if (this == undefined || this == "" || this == null || /^\s*$/.test(this)) {
           return true;
       return false;
   };