JavaScript Array fill()
Examples
Fill all the elements with a value:
const fruits = ["Banana", "Orange", "Apple", "Mango"];
fruits.fill("Kiwi");
Try it Yourself »
Fill the last two elements:
const fruits = ["Banana", "Orange", "Apple", "Mango"];
fruits.fill("Kiwi", 2, 4);
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Description
The fill() method fills specified elements in an array with a value.
The fill() method overwrites the original array.
Start and end position can be specified. If not, all elements will be filled.
Syntax
array.fill(value, start, end)
Parameters
| Parameter | Description |
| value | Required. The value to fill in. |
| start | Optional. The start index (position). Default is 0. |
| end | Optional. The stop index (position). Default is array length. |
Return Value
| Type | Description |
| Array | The filled array. |
Array Tutorials:
Browser Support
fill() is an ECMAScript6 (ES6) feature.
ES6 (JavaScript 2015) is supported in all modern browsers since June 2017:
| Chrome 51 | Edge 15 | Firefox 54 | Safari 10 | Opera 38 |
| May 2016 | Apr 2017 | Jun 2017 | Sep 2016 | Jun 2016 |
fill() is not supported in Internet Explorer.
