Array.prototype.fill() with object passes reference and not new instance in JavaScript?

To fix this, you can use map() in JavaScript.

The syntax is as follows −

var anyVariableName= new Array(yourSize).fill().map(Object);

Example

Following is the code −

var arrayOfObject = new Array(5).fill().map(Object);
console.log(arrayOfObject);

To run the above program, you need to use the following command −

node fileName.js.

Here, my file name is demo311.js.

Output

This will produce the following output −

PS C:\Users\Amit\javascript-code> node demo311.js
[ {}, {}, {}, {}, {} ]

AmitDiwan

Updated on: 26-Oct-2020

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