javascriptInsert an item to an array at a certain index

var arr = ['value1', 'value2'];
arr.splice(1, 0, 'new value');ctrl + cyoutubegithub

`var arr` declare test array to insert new value into	`arr.splice` inserts a new value into an array
`(1,` index to insert new value at (starts at `0`, so we will insert our value at second position)	`0,` do not delete any values from old array
`'new value'` what value to insert