splice()
MethodYou can use the splice()
method to insert a value or an item into an array at a specific index in JavaScript. This is a very powerful and versatile method for performing array manipulations.
The splice()
method has the syntax like array.splice(startIndex, deleteCount, item1, item2,...)
. To add elements to an array using this method, set the deleteCount
to 0
, and specify at least one new element, as demonstrated in the following example:
<script>
var persons = ["Harry", "Clark", "John"];
// Insert an item at 1st index position
persons.splice(1, 0, "Alice");
console.log(persons); // Prints: ["Harry", "Alice", "Clark", "John"]
// Insert multiple elements at 3rd index position
persons.splice(3, 0, "Ethan", "Peter");
console.log(persons); // Prints: ["Harry", "Alice", "Clark", "Ethan", "Peter", "John"]
</script>
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