Anil Singh | Code-sample.com

What is Hoisted in JavaScript? In the JavaScript, the variables can be used before declared, this kinds of mechanism is called Hoisted . It's a default behavior of JavaScript . You can easily understanding  in the below example in detail. //The variable declaration look like. var   emp; //The variable initialization look like. emp =   "Anil Singh" ; var   emp;   //The declaration of emp is hoisted but the value of emp is  undefined. emp = 10;   //The Assignment still occurs where we intended (The value of emp is 10) function   getEmp() {     var   emp;   //The declaration of a different variable name emp is hoisted but the value of emp is  undefined.     console.log(emp);   //The output is undefined     emp = 20;   //The assignment values is 20.     console.log(emp);   //The output i...

What is Prototype in JavaScript? How to create prototype in JavaScript? The prototype is a fundamental concept of JavaScript and its must to known JavaScript developers and a ll the   JavaScript objects  have an object and its property called prototype and its used to add and the custom functions and property. The example looks like, var employee = function () { //This is a constructor function. } //Crate the instance of above constructor function and assign in a variable var empInstance = new employee(); empInstance.deportment = "IT" ; console .log (empInstance.deportment); //The output of above is IT. The example with prototype as given below. var employee = function () { //This is a constructor function.} employee . prototype . deportment = "IT" ; //Now, for every instance employee will have a deportment. //Crate the instance of above constructor function and assign in a variable var empInstance = new employee()...