js last index of array code example

Example 1: javascript last element of array

let arr = [1,2,3]
arr[arr.length - 1] //returns last element in an array

Example 2: javascript last element of array

arr.slice(-1)[0]

Example 3: Javascript get last item in array

var colors = ["red","blue","green"];
var green = colors[colors.length - 1]; //get last item in the array

Example 4: javascript last element of array

var last = arr.slice(-1)[0]

Example 5: js last index of

const str = "Users/Edit/12345";
let idx = str.lastIndexOf("/"); // returns 10
idx = str.lastIndexOf("x"); // returns -1

idx = str.lastIndexOf("Edit") // returns 6
idx = str.lastIndexOf("edit") // returns -1 -- case sensitive

// add "from" parameter
// the search happens backwards, starting at the provided from parameter
idx = str.lastIndexOf("s"); // returns 4
idx = str.lastIndexOf("s", 3); // returns 1

Example 6: last index of array js

array.lastIndexOf(searchElement[, fromIndex]);