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- JavaScript String indexOf () Method - W3Schools
indexOf() is an ECMAScript1 (JavaScript 1997) feature It is supported in all browsers: 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
- Array. prototype. indexOf () - JavaScript | MDN
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
- How to Use indexOf () in JavaScript - DEV Community
Learn how to use indexOf () in JavaScript with syntax, examples, best practices, and comparisons with includes () Perfect for beginners Tagged with javascript, webdev, beginners, programming
- JavaScript Array indexOf () Method
This tutorial shows you how to use the JavaScript Array indexOf () method to find the first index of the element
- JavaScript Array indexOf () Method - GeeksforGeeks
This code demonstrates the use of the indexOf() method to find the index of a specific element (2) in an array (A) It returns the index of the first occurrence of the element in the array (1 in this case)
- JavaScript Array indexOf () - Programiz
indexOf () Return Value Returns the first index of the element in the array if it is present at least once Returns -1 if the element is not found in the array Note: indexOf() compares searchElement to elements of the Array using strict equality (similar to triple-equals operator or ===)
- Check For The Presence of an Element With indexOf ()
Luckily, JavaScript provides us with another built-in method, indexOf(), that allows us to quickly and easily check for the presence of an element on an array indexOf() takes an element as a parameter, and when called, it returns the position, or index, of that element, or -1 if the element does not exist on the array
- JavaScript | Arrays | . indexOf () | Codecademy
The indexOf() method returns the first index at which a specified element can be found in an array, or -1 if the element is not present This method searches the array from left to right and uses strict equality comparison to match elements
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