How to get index number of object array using indexOf method only in JavaScript?

Answer 1

for(i of arr){
console.log(arr.indexOf(i));
}

Answer 2

Thanks Abhay and thanks to infinite too

Answer 3

I did this way but I want to do it for this array given below:

var arr = [
{id : 1, value : 'a'},
{id : 2, value : 'b'}
] ;

Answer 4

https://code.sololearn.com/WliS4TVX6YUf/?ref=app