Function indexOf

  • Gets the index at which the first occurrence of value is found in array using SameValueZero for equality comparisons. If fromIndex is negative, it's used as the offset from the end of array.

    Type Parameters

    • T

    Parameters

    • array: ArrayLike<T>

      The array to inspect.

    • value: T

      The value to search for.

    • Optional fromIndex: number

      The index to search from.

      Optional

    Returns number

    Returns the index of the matched value, else -1.

    Since

    5.5.1

    Example

    indexOf([1, 2, 1, 2], 2)
    // => 1

    // Search from the `fromIndex`.
    indexOf([1, 2, 1, 2], 2, 2)
    // => 3

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