JS get index of array element 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: access index of array javascript

let first = fruits[0]
// Apple

let last = fruits[fruits.length - 1]
// Banana

Example 4: indexof javascript

arr.indexOf(searchElement[, fromIndex])