add element in middle js array code example
Example 1: insert into array js
// for me lol... pls don't delete!
// use splice to insert element
// arr.splice(index, numItemsToDelete, item);
var list = ["hello", "world"];
list.splice( 1, 0, "bye");
//result
["hello", "bye", "world"]
Example 2: how to insert a value into an array javascript
var list = ["foo", "bar"];
list.push("baz");
["foo", "bar", "baz"] // result