JavaScript Array fill() Method

The fill() method uses a static value to fill all elements of the array from the start index to the end index.

Syntax:

array.fill(value, start, end)

Example

var nums = [1,　2,　3,　4]);
nums.fill(17);

The numbers in the table specify the first browser version that fully supports the fill() method:

Method
fill()	45	31	Yes	8	Yes

Parameter	Description
value	（Required）Value to fill the array with
start	（Optional）Index to start filling the array. The default is 0
end	（Optional）Index to stop filling the array. The default value isthis.length

Return value:	Modified array
JavaScript version:	ECMAScript 6

From position2To position4Fill 0:

Example

var nums = [1,　2,　3,　4]);
nums.fill(0,　2,　4);

From position1Fill7:

Example

var nums = [1,　2,　3,　4]);
nums.fill(7,　1);