javascript get the index of a value in an array code example

Example 1: js get index of item in array

array.indexOf("item");

Example 2: if value in list javascript and return index

a = [
  {prop1:"abc",prop2:"qwe"},
  {prop1:"bnmb",prop2:"yutu"},
  {prop1:"zxvz",prop2:"qwrq"}];
    
index = a.findIndex(x => x.prop2 ==="yutu");

console.log(index);