De-structuring assignment in JavaScript.
De-structuring assignment is a form of special syntax allows us to destructure objects properties, or array values and later assign them to different variables.
Following is the code for the destructuring assignment 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;
}
.sample,.result {
font-size: 18px;
font-weight: 500;
color: red;
}
.result {
color: rebeccapurple;
}
</style>
</head>
<body>
<h1>De-structuring assignment in JavaScript</h1>
<div class="sample"></div>
<div class="result"></div>
<button class="Btn">CLICK HERE</button>
<h3>Click on the above button to destructure the array and object above</h3>
<script>
let sampleEle = document.querySelector(".sample");
let resultEle = document.querySelector(".result");
let arr = [2, 3, 4, 5];
let obj = {
firstName: "Rohan",
lastName: "Sharma",
};
sampleEle.innerHTML = "arr = " + arr + "<br>";
sampleEle.innerHTML += "obj = {firstName:'Rohan',lastName:'Sharma'}";
let a, b;
[a, b] = arr;
let { firstName, lastName } = obj;
document.querySelector(".Btn").addEventListener("click", () => {
resultEle.innerHTML = `a=${a} b=${b} <br>`;
resultEle.innerHTML += `firstName=${firstName} lastName=${lastName}`;
});
</script>
</body>
</html>Output
The above code will produce the following output −
On clicking the ‘CLICK HERE’ button −
Published on 16-Jul-2020 08:54:06
