findIndex()
ES6+Returns the index of the first element in the array that satisfies the provided testing function.
Syntax
array.findIndex(callback(element, index, array), thisArg)Parameters
callback Function Function to test each element
Return Value
number
The index of the first matching element, or -1
Examples
JavaScript
const numbers = [5, 12, 8, 130, 44];
const index = numbers.findIndex(x => x > 10);
console.log(index);Output:
// 1