Nodejs Object Type Check isBoolean()

Method Source Code

Object.prototype.isBoolean = function () {
    return (typeof (this.valueOf()) === 'boolean')
};

Related

1. isInteger()

   Object.prototype.isInteger = function () {
       var number = parseFloat(this.valueOf());
       return number.isNumber() && /^-?\d+$/.test(String(number));
   };
   

2. isJSON()

   Object.prototype.isJSON = function () {
       try {
           JSON.parse(this);
           return true;
       } catch (e) {
           return false;
   

3. isTypeOf(type)

   Object.prototype.isTypeOf = function(type) {
     var that = this;
     return Object.prototype.toString.call(that) === '[object ' + type + ']';
   

4. type()

   Object.defineProperty(Object.prototype, 'type', {
       get() {
           let value
           if(this.val) {
             value = this.val
           else {
             value = this.valueOf()
           let is_arr  = value instanceof Array || Array.isArray(value)
           let is_num  = value instanceof Number || !isNaN(value) 
           let is_bool = value instanceof Boolean || typeof value == 'boolean'
           let is_str  = value instanceof String || typeof value == 'string'
           let is_fn   = value instanceof Function || typeof value == 'function'
           let is_rx   = value instanceof RegExp
           let is_obj  = typeof value == 'object'
           if(is_str) {
             return 'string'
           if(is_bool) {
             return 'boolean'
           if(is_num) {
             return 'number'
           if(is_rx) {
             return 'regex'
           if(is_arr) {
               return 'array'
           if(is_fn) {
             return 'function'
           if(is_obj) {
             return 'object'
   })