You try by changing arrow function to normal function
var arrayIs = [23,45,67,1,30,45,60]
var searchValue;
function getIndex(d,i) {
if(d==searchValue) return i;
}
searchValue = 10;
console.log(arrayIs.findIndex(getIndex)); // -1(not found)
searchValue= 30;
console.log(arrayIs.findIndex(getIndex)); // 4(found at index 4)
If above solution is not work then you can try, traditional approach
let arrayIs = [23,45,67,1,30,45,60]
function getIndex(array, searchValue) {
for(var i=0; i<array.length; i++){
if(array[i]==searchValue) return i;
}
return -1;
}
console.log(getIndex(arrayIs, 10)); // -1(not found)
console.log(getIndex(arrayIs, 30)); // 4(found at index 4)
If, IE support let then don't use var, instead of var use let