Function isFunction

  • isFunction(value): value is Function

  • Checks to see if the past value is a function value

    Parameters

    • value: any

      The value to check

    Returns value is Function

    Example

    function myFunction() { }
    isFunction(null);            // false
    isFunction(undefined);       // false
    isFunction("null");          // false
    isFunction("undefined");     // false
    isFunction("1");             // false
    isFunction("aa");            // false
    isFunction(new Date());      // false
    isFunction(1);               // false
    isFunction("");              // false
    isFunction(myFunction);      // true
    isFunction([]);              // false
    isFunction(new Array(1));    // false

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