The indexOf() method starts at a specified index and searches from left to right (from the given start postion to the end of the array). By default the search starts at the first element and ends …

Apr 3, 2025 · JavaScript arrays are zero-indexed: the first element of an array is at index 0, the second is at index 1, and so on — and the last element is at the value of the array's length …

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.

There is no need to use new Array(). For simplicity, readability and execution speed, use the array literal method. You access an array element by referring to the index number: Note: Array …

Mar 19, 2025 · This chapter introduces collections of data which are ordered by an index value. This includes arrays and array-like constructs such as Array objects and TypedArray objects.

JavaScript Array indexOf () The indexOf() method searches an array for an element value and returns its position.

Sep 8, 2011 · It is possible to use a ES6 function Array.prototype.findIndex. MDN says: The findIndex() method returns the index of the first element in the array that satisfies the provided …

Dec 21, 2019 · You can access an element at a specific index using the bracket notation accessor. var valueAtIndex1 = myValues[1]; On newer browsers/JavaScript engines (see …

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 …

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: