Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Physics
Chemistry
Biology
Mathematics
English
Economics
Psychology
Social Studies
Fashion Studies
Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
How to change an object Key without changing the original array in JavaScript?
Following is the code to change an object key without changing the original array in JavaScript −
Example
<!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;
}
</style>
</head>
<body>
<h1>Change an object Key without changing the original array</h1>
<button class="Btn">CLICK HERE</button>
<h3>
Click the above button to change the name object key to fullName
</h3>
<script>
let BtnEle = document.querySelector(".Btn");
let resEle = document.querySelector(".result");
let sampleEle = document.querySelector(".sample");
let obj = [
{ name: "Rohan Sharma", age: 12 },
{ name: "Shawn Mendes", age: 18 },
{ name: "Michael Shaw", age: 15 },
{ name: "Mitch Johansson", age: 19 },
];
BtnEle.addEventListener("click", () => {
obj = obj.map((ele) => {
ele["fullName"] = ele["name"];
delete ele["name"];
return ele;
});
console.log(obj);
});
</script>
</body>
</html>Output
The above code will produce the following output −
On clicking the ‘CLICK HERE’ button and inspecting the output in console −
Updated on: 18-Jul-2020
368 Views
Advertisements