add item to array at specific index code example

Example 1: javascript push in specific index

arr.splice(index, 0, item);
//explanation:
inserts "item" at the specified "index",
deleting 0 other items before it

Example 2: insert item into array specific index javascript

myArray.splice(index, 0, item);

Example 3: add an object to index 0 array js

//Add an object to start of array
splice(index,noOfItemstoDelete,item);
ex - arr.splice(0,0,item);