How to get the index of the element in javascript?

Question

The NodeList don\'t have a indexOf(element) method? So, how can I get the element index?

Answer 1

Let us say you have the following line:

const list=document.querySelectAll('.some_class .someother_class');

list will be a nodelist. So we can convert the nodelist to an array and create a new array of indexes as follows:

const indexArr= [...list].map( element => return [...list].indexOf(element) );

indexArr contains all the indexes of elements in the original list.