Nodejs String Empty Check isBlank()

Method Source Code

String.prototype.isBlank = function()
{
   try//from   w w  w  . ja va 2s. co  m
   {
      var value = this.toString().trim();

      // Validate is null
      if (value == null) return true;

      // Validate by length
       if (value.length == 0)
          return true;
       else
          return false;
   }
   catch(err)
   {
      return false;
   }
};

Related

1. isBlank()

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

2. isBlank()

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

3. isBlank()

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

4. 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;
   ...
   

5. isBlank()

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

6. isBlank(pattern)

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