javascriptFind index of array element with a certain value

arr.findIndex(el => el == 'val')ctrl + cyoutubegithub

`arr` array to search in	`findIndex` find index of the element defined by a callback function
`el == 'val'` we want to get index of an element with `val` value

var arr = ['oh', 'hi', 'ha'];
var index = arr.findIndex(el => el == 'hi');
console.log(index);