Math.pow() floating point number as exponent [closed]

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I want to pass a floating-point number as the second argument (exponent) to Math.pow(). I always get NaN when the passed number is not a whole number, like 0, 2, 7, you name it. Is there a working way in javascript to make this work?

(function () {
    var notice = document.getElementById('notice');
    var value = 0.0;
    var interval = 0.02;
    var timeInterval = 10;
    function interpolation(x) {
        var y = Math.pow(Math.e, x);      // <<< HERE >>>
        console.log(x, y);
        return y;
    }
    function animation() {
        var callAgain = true;
        if (value >= 1) {
            value = 1.0;
            callAgain = false;
        }
        notice.style['opacity'] = interpolation(value);
        notice.style['marginTop'] = (value * 20 + 20) + 'px';
        value += interval;
        if (callAgain) {
            setTimeout(animation, timeInterval);
        }
    }
    animation();
})();

PS: Please don't comment, that an opacity greater than 1 doesn't make any sense. I know that e^x; x > 0 will yield values greater than 1. I'll insert a proper function when I got this working.

Answer 1

The constant is Math.E, not Math.e