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Replacing and Adding elements is one of the most important aspects of JavaScript. In this article, we will understand the Splice method() in Javascript in the following manner:
What is Splice Method() in JavaScript?
The splice() method in JavaScript changes the contents of an array by removing or replacing existing elements and/or adding new elements.
Syntax
array.splice(index, howMany, [element1][, ..., elementN]);
Array.splice( index, remove_count, item_list )
Parameters of Splice Method() in JavaScript
This method accepts many parameters some of them are described below:
index: It is a required parameter. This parameter is the index which starts modifying the array (with the origin at 0). This can be negative also, which begins after that many elements counting from the end.
remove_count: The number of elements to be removed from the starting index.
items_list: The list of new items separated by a comma operator that is to be inserted from the starting index.
Return Value: While it mutates the original array in-place, still it returns the list of removed items. In case there is no removed array it returns an empty array
Example Code
Example 1:
<!DOCTYPE html>
<html>
<body>
<p>Click the button to add and remove elements.</p>
<button onclick="myFunction()">Try it</button>
<p id="demo"></p>
<script>
var fruits = ["Banana", "Orange", "Apple", "Mango"];
document.getElementById("demo").innerHTML = fruits;
function myFunction() {
fruits.splice(2, 1, "Lemon", "Kiwi");
document.getElementById("demo").innerHTML = fruits;
}
</script>
</body>
</html>
Example 2:
Add an element to the existing array while removing other elements.
<script> var arr=["Monday","Tuesday","Saturday","Sunday","Thursday","Friday"]; var result=arr.splice(2,2,"Wednesday") document.writeln("Updated array: "+arr+"<br>"); document.writeln("Removed element: "+result); </script>
Example 3:
Add an element to the existing array while removing other elements.
<script> var arr=["Monday","Tuesday","Saturday","Sunday","Thursday","Friday"]; var result=arr.splice(2); document.writeln("Updated array: "+arr+"<br>"); document.writeln("Removed element: "+result); </script>
With this, we come to an end of this Splice method() in Javascript article. I hope you got an understanding of how to use the splice method().
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