The JavaScript Array fill() Method fills a given range of array elements with the given value. This method is used to manipulate the existing array according to our needs.
Syntax:
arr.fill(value,start,end)
Parameters:
- Value: Value to be filled.
- Start: Start index (included) and its default value is 0.
- End: End index (excluded) and its default index is this.length.
Return value: It returns the modified array.
Example 1: In this example, we will fill an array with 0 starting from an index at 2 till the end index of 4.
JavaScript
// input array contain some elements. let array = [1, 2, 3, 4]; Â Â // Here array.fill function fills with 0 // from position 2 till position 3. console.log(array.fill(0, 2, 4)); |
Output:
Array [1, 2, 0, 0]
Example 2: In this example, we will fill the array with 9 starting from an index at 2 till the end index of the array.
JavaScript
// input array contain some elements. let array = [1, 2, 3, 4, 5, 6]; Â Â // Here array.fill function fill with // 9 from position 2 till end. console.log(array.fill(9, 2)); |
Output:
Array [1, 2, 9, 9, 9, 9]
 Example 3: In this example, we will fill the array completely with 6. This is done by not giving the start and end index to the fill method.
JavaScript
// input array contain some elements. let array = [1, 2, 3, 4]; Â Â // Here array.fill function fill with // 6 from position 0 till end. console.log(array.fill(6)); |
Output:
Array [6, 6, 6, 6]
We have a complete list of Javascript Array methods, to check those please go through this Javascript Array Complete reference article.
Supported Browsers:The browsers supported by JavaScript Array join() method are listed below:
- Google Chrome 1.0 and above
- Microsoft Edge 12 and above
- Mozilla Firefox 1.0
- Safari 1 and above
- Opera 4 and above
We have a Cheat Sheet on Javascript where we covered all the important topics of Javascript to check those please go through Javascript Cheat Sheet-A Basic guide to JavaScript.
