The new operator in JavaScript

Javascript Web Development Object Oriented Programming

The new operator is used for creating a user-defined object type instance of one of the builtin object types that has a constructor function.

Following is the code for new operator in JavaScript −

Example

Live Demo

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Document</title>
<style>
   body {
      font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
   }
   .result {
      font-size: 20px;
      font-weight: 500;
      color: blueviolet;
   }
</style>
</head>
<body>
<h1>New Operator in JavaScript</h1>
<div class="result"></div>
<br />
<button class="Btn">Click Here</button>
<h3>Click on the above button to create the object person1 from Person
constructor</h3>
<script>
   let resEle = document.querySelector(".result");
   let BtnEle = document.querySelector(".Btn");
   function Person(name, age, designation) {
      this.name = name;
      this.age = age;
      this.designation = designation;
   }
   let person1 = new Person("Rohan Sharma", 19, "student");
   BtnEle.addEventListener("click", () => {
      resEle.innerHTML = "person1.name = " + person1.name + "<br>";
      resEle.innerHTML += "person1.age = " + person1.age + "<br>";
      resEle.innerHTML +=
      "person1.designation = " + person1.designation + "<br>";
   });
</script>
</body>
</html>