How to set dynamic property keys to an object in JavaScript?
Previously it is a two-step process to create a property in an object but the advent of ES6 has made the task very simple. In only one step we can create a property dynamically. Let's discuss it in a nutshell.
Old method(2 step process)
Example
In the following example, the property, instead of declaring in the object itself, is declared outside the object, making it a two-step process.
Live Demo
<html>
<body>
<script>
let person = 'name';
let student = { // step-1
id: 1,
};
student[person] = 'nani'; // step-2
document.write(JSON.stringify(student));
</script>
</body>
</html>Output
{"id":1,"name":"nani"}
ES6 Method
Example
In the following example, the property of the object is declared directly in the object itself rather than declaring it outside the object, making it a 1 step process
Live Demo
<html>
<body>
<script>
let person = 'name';
let student = {
id: 1,
[person] : "nani"
};
document.write(JSON.stringify(student));
</script>
</body>
</html>Output
{"id":1,"name":"nani"}
Published on 30-Jul-2019 09:27:32
