how to find index of element in array code example
Example 1: javascript get index of object with value in array
const needle = 3;
const haystack = [{ id: 1 }, { id: 2 }, { id: 3 }];
const index = haystack.findIndex(item => item.id === needle);
Example 2: how to find the index of a value in an array in javascript
var list = ["apple","banana","orange"]
var index_of_apple = list.indexOf("apple")
Example 3: js find index in list
let myList = ['foo', 'bar', 'qux'];
myList.indexOf('bar');
Example 4: js get index of item in array
array.indexOf("item");
Example 5: index of value in array
var imageList = [
{value: 100},
{value: 200},
{value: 300},
{value: 400},
{value: 500}
];
var index = imageList.findIndex(img => img.value === 200);
Example 6: get index of element in array javascript
var scores = [10, 20, 30, 10, 40, 20];
console.log(scores.indexOf(30));
console.log(scores.indexOf(50));