Nodejs String Empty Check isBlank(pattern)

Method Source Code

/**/* www  .j  a v a 2  s.c  o m*/
 *  String#isBlank() -> Boolean
 *
 *  Check if the string is "blank" — either empty (length of `0`) or
 *  containing only whitespace.
 *
 *  ##### Example
 *
 *      ''.isBlank();
 *      //-> true
 *
 *      '  '.isBlank();
 *      //-> true
 *
 *      ' a '.isBlank();
 *      //-> false
**/
String.prototype.isBlank = function(pattern) {
  return /^\s*$/.test(this);
};

Related

1. isBlank()

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

2. isBlank()

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

3. 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;
   ...
   

4. isBlank()

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

5. isBlank()

   String.prototype.isBlank = function()
     try
       var value = this.toString().trim();
       if (value == null) return true;
         if (value.length == 0)
           return true;
         else
   ...