How to Find Index of an Array Element Using JavaScript?
Learn how to find the index of an array element using JavaScript. Explore methods like indexOf(), findIndex(), and practical examples for efficient array manipulation.
Sign in to track your courses, save progress, and apply for internships. Sign in or create an account.
3 Answers
JavaScript's indexOf() function can be used to determine the index of an array element.
The indexOf() function returns -1 if an element is missing from the array or the first index at which the element can be found.
JavaScript Array findIndex()
This method executes a function for each element and returns the index(position) of the the first element that passes a test. If the method did'nt find a match then returns -1.
Use the indexOf() method to find an element's index in an array. If the element is not found, it returns '-1'.
