Is it possible to de-structure to already-declared variables? In JavaScript?

JavascriptWeb DevelopmentObject Oriented Programming

Following is the code to de-structure already declared variables 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: 18px;
      font-weight: 500;
      color: rebeccapurple;
   }
</style>
</head>
<body>
<h1>De-structure to already-declared variables</h1>
<div class="result"></div>
<br />
<button class="Btn">CLICK HERE</button>
<h3>Click on the above button to destructure the personObj object</h3>
<script>
   let resEle = document.querySelector(".result");
   let BtnEle = document.querySelector(".Btn");
   let name, age, personObj;
   personObj = {
      name: "Rohan",
      age: 19,
   };
   BtnEle.addEventListener("click", () => {
      ({ name, age } = personObj);
      resEle.innerHTML = " name = " + name + "<br>age = " + age;
   });
</script>
</body>
</html>

Output

The above code will produce the following output −

On clicking the ‘CLICK HERE’ button −

raja
Published on 21-Jul-2020 07:39:25
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