Web Reference: Jul 20, 2025 · The findIndex () method of Array instances returns the index of the first element in an array that satisfies the provided testing function. If no elements satisfy the testing function, -1 is returned. Well organized and easy to understand Web building tutorials with lots of examples of how to use HTML, CSS, JavaScript, SQL, Python, PHP, Bootstrap, Java, XML and more. DevTips Daily: JavaScript array findIndex method Code With Bubb 62.9K subscribers Subscribed
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