Shared properties in JavaScript

Properties can be shared by attaching them to the prototype property of the object. These properties will be shared among all the instances of the object.

Following is the code for sharing properties in JavaScript −


 Live Demo

<!DOCTYPE html>
<html lang="en">
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
   body {
      font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
   .result {
      font-size: 20px;
      font-weight: 500;
      color: blueviolet;
<h1>Shared properties in JavaScript</h1>
<div class="result"></div>
<button class="Btn">CLICK HERE</button>
<h3>Click on the above button to the view properties of student1 and student2 objects</h3>
   let resEle = document.querySelector(".result");
   function Student(name, age) { = name;
      this.age = age;
   } = "St Marks School";
   let student1 = new Student("Rohan", 17);
   let student2 = new Student("Shawn", 16);
   document.querySelector(".Btn").addEventListener("click", () => {
      resEle.innerHTML = `${} age ${student1.age} : school
      :${} <br>`;
      resEle.innerHTML += `${} age ${student2.age} : school


On clicking the ‘CLICK HERE’ button −