What is the splice() method in JS?

The splice() method adds or removes items from the array and then returns the deleted item. This method will change the original array. The syntax is [arrayObject.splice(index,howmany,item1,.... .,itemX)].

The splice() method in JS is:

1. Definition and usage

splice() The method adds/removes items from the array and then returns the deleted item.

Note: This method will change the original array.

2. Syntax

arrayObject.splice(index,howmany,item1,.....,itemX)

3. Description

• splice() Method removes zero or more elements starting at index and replaces those removed elements with one or more values ​​declared in the parameter list.

• If an element is deleted from arrayObject , the array containing the deleted element is returned.

5. Example

Example 1

In this example, we will create a new array and add it to Add an element:

<script type="text/javascript">
var arr = new Array(6)
arr[0] = "George"
arr[1] = "John"
arr[2] = "Thomas"
arr[3] = "James"
arr[4] = "Adrew"
arr[5] = "Martin"
document.write(arr + "<br />")
arr.splice(2,0,"William")
document.write(arr + "<br />")
</script>

Output:

George,John,Thomas,James,Adrew,Martin
George,John,William,Thomas,James,Adrew,Martin

Example 2

In this example we will delete the element at index 2 and add a new element to replace the deleted element Elements:

<script type="text/javascript">
var arr = new Array(6)
arr[0] = "George"
arr[1] = "John"
arr[2] = "Thomas"
arr[3] = "James"
arr[4] = "Adrew"
arr[5] = "Martin"
document.write(arr + "<br />")
arr.splice(2,1,"William")
document.write(arr)
</script>

Output:

George,John,Thomas,James,Adrew,Martin
George,John,William,James,Adrew,Martin

Related learning recommendations: javascript video tutorial

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