indexof in js array code example

Example 1: js get index of item in array

array.indexOf("item");

Example 2: javasript array indexof

var array = [2, 9, 9];
array.indexOf(2);     // 0
array.indexOf(7);     // -1
array.indexOf(9, 2);  // 2
array.indexOf(2, -1); // -1
array.indexOf(2, -3); // 0

Example 3: how to get the index of an array in javascript

search = (arr, item) => { return arr.indexOf(item); }