The JavaScript Array indexOf () Method is used to find the index of the first occurrence of the search element provided as the argument to the method. This method always compares the …

The indexOf() method returns the first index (position) of a specified value. The indexOf() method returns -1 if the value is not found. The indexOf() method starts at a specified index and …

Dec 29, 2011 · Good answer, but I did some performance benchmarking (see jsperf.com/find-index-of-object-in-array-by-contents ), and found that the function based answer mentioned …

Dec 21, 2019 · On newer browsers/JavaScript engines (see browser compatibility here), you can also use the .at() method on arrays. var valueAtIndex1 = myValues.at(1); On positive indexes, …

Sep 27, 2024 · The indexOf () method in JavaScript is used to find the position of the first occurrence of a specific value in an array. If the value is not present, it returns -1. This method …

JavaScript arrays are zero-indexed. The Javascript Arrays are not associative in nature. Arrays are used when we have a list of items. An array allows you to store several values with the …

The indexOf() method searches an array for an element value and returns its position. Note: The first item has position 0, the second item has position 1, and so on. Search an array for the …

The Array indexOf() method returns the index of the first matching element in an array or -1 if there is no matching element. Here’s the syntax of the indexOf() method: const index = array …

Mar 13, 2025 · The indexOf() method of Array instances returns the first index at which a given element can be found in the array, or -1 if it is not present.

The indexOf() method returns the first index of occurance of an array element, or -1 if it is not found. // Output: 1. The syntax of the indexOf() method is: Here, arr is an array. The indexOf() …