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Explain Deep cloning an object in JavaScript with an example.
Following is the code for deep cloning an object in JavaScript −
Example
<!DOCTYPE html>
<htmllang="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>Deep cloning an object in javascript</h1>
<div class="result"></div>
<button class="Btn">CLICK HERE</button>
<h3>Click the above button to deep clone the obj object</h3>
<script>
let BtnEle = document.querySelector(".Btn");
let resEle = document.querySelector(".result");
let obj = {
firstName: "Rohan",
lastName: "Sharma",
age: 22,
rollNo: "A12",
};
let obj1 = JSON.parse(JSON.stringify(obj));
BtnEle.addEventListener("click", () => {
obj.firstName = "Mohit";
resEle.innerHTML = "obj.firstName =" + obj.firstName + "<br>";
resEle.innerHTML += "obj1.firstName = " + obj1.firstName + "<br><br>";
});
</script>
</body>
</html>
Output
The above code will produce the following output −
On clicking the ‘CLICK HERE’ button −
Updated on: 2020-07-18T08:41:52+05:30
254 Views
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