JavaScript Array fill()

Fill all the elements with a value:

const fruits = ["Banana", "Orange", "Apple", "Mango"];
fruits.fill("Kiwi");

Fill the last two elements:

const fruits = ["Banana", "Orange", "Apple", "Mango"];
fruits.fill("Kiwi", 2, 4);

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.

array.fill( value, start, end)

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.

Type	Description
Array	The filled array.

fill() is an ECMAScript6 (ES6) feature.

ES6 (JavaScript 2015) is supported in all modern browsers:


Chrome	Edge	Firefox	Safari	Opera
Yes	Yes	Yes	Yes	Yes

fill() is not supported in Internet Explorer 11 (or earlier).