QuestionSets/timer.html at master · MatzElectronics/QuestionSets · GitHub

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<!DOCTYPE html>
<html lang="en">

<head>
    <title>Stopwatch practice</title>
    <style>
        @import url('https://fonts.googleapis.com/css2?family=Roboto:ital,wght@0,400;0,700;1,400;1,700&display=swap');

        body,
        input,
        select,
        textarea,
        body * {
            font-family: 'Roboto', sans-serif;
            box-sizing: border-box;
        }

        body {
            padding: 50px;
            background: url('polyBkgRed.svg');
            background-size: cover;
            min-height: 100vh;
        }

        .infoText {
            color: #ccc;
            font-size: 0.8em;
        }


        #qField {
            padding: 20px;
            background: #fff;
            border-radius: 5px;
        }
        h1 {
            font-size: 1.5em;
        }
        h2 {
            font-size: 1.25em;
        }
    </style>

    <script src="common_utils.js"></script>
</head>

<body>
    <main id="qField">
        <h1>Measurement Practice - Stopwatch</h1>
        <hr>

        <div id="result" class="car_image">
            <svg viewBox="0 0 800 100" version="1.1" xmlns="http://www.w3.org/2000/svg">
                <path d="M0,40 800,40" stroke="#ddd" stroke-width="80" />
                <path d="M100,0 100,80" stroke="#000" stroke-width="3" stroke-dasharray="5,5" />
                <path id="finishLine" d="M0,0 0,80" stroke="#000" stroke-width="3" stroke-dasharray="5,5"
                    transform="translate(700,0)" />
                <g id="car" transform="translate(0,0)">
                    <path id="car0" d="M25,15 40,15 40,65 25,65Z" fill="#222" />
                    <path id="car1" d="M80,15 95,15 95,65 80,65Z" fill="#222" />
                    <path id="car2" d="M20,20 100,20 100,60 20,60Z" fill="#777" />
                    <path id="car3" d="M20,20 100,20 100,60 20,60Z" fill="#aaa" />
                </g>
            </svg>
        </div>

        <table>
            <tr>
                <td style="max-width:300px;">
                    Use a stopwatch (on your phone is okay) to time how long it takes the car to cross the finish
                    line.<br>
                    <br>Use the &quot;Go!&quot; button to start the car.</td>
                <td style="padding-left:40px;"><button id="carGo" onclick="startCar(theAccel, endPos);">Go!</button>
                </td>
            </tr>
        </table><br>
        Time: <input type="text" title="Your Answer" id="guessWidth" onFocus="$('#tryagain').innerHTML='&nbsp;';" size="5" />
        seconds<br><br>

        <div id="tryagain" style="font-size:12px;color:#aa0000;">&nbsp;</div>
        <button id="check" onclick="checkAnswer()">check answer</button>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
        <br><br>

        <button id="setup" onclick="setFinish();">skip</button>

        <hr>

        <h2>Score: <span id="score">0
            </span> - <span id="codeZ">
            </span>
        </h2>
    </main>

    <script>
        var endPos = 700;
        var theAccel = 0.08;
        var theInterval = 10;
        var theTime = -5;

        setScoreFromCookie('Stopwatch', (checkScoreCookie) => {});

        function setFinish() {
            endPos = Math.floor(Math.random() * 250 + 500);
            $('#finishLine').transform.baseVal.getItem(0).setTranslate(endPos, 0);
            theAccel = Math.random() * 0.06 + 0.05;
            theInterval = Math.random() * 30 + 10;
            theTime = -5;
        }

        function startCar(ac, ep) {
            var carPos = 0;
            var accel = ac;
            var accelAmt = ac;
            var stamp = performance.now();
            var mover = setInterval(function () {
                if (carPos) {
                    $('#car').transform.baseVal.getItem(0).setTranslate(carPos, 0);
                }
                carPos += accelAmt;
                accelAmt += accel;

                if (carPos <= (ep - 92) && carPos > (ep - 192)) {
                    theTime = (performance.now() - stamp) / 1000;
                }

                if (carPos > 700) {
                    clearInterval(mover);
                    setTimeout(function () {
                        $('#car').transform.baseVal.getItem(0).setTranslate(0, 0);
                    }, 1000);
                }
            }, theInterval);
        }

        function checkAnswer() {
            var aw = parseFloat($('#guessWidth').value);

            var z = getScore();

            var awDiff = Math.abs(aw - theTime);

            if (awDiff < .26) {
                z++;

                setScore(z, 'Stopwatch');
                setFinish();

                $('#tryagain').innerHTML = 'Correct!';
                $('#guessWidth').value = '';
            } else {
                $('#tryagain').innerHTML = 'Incorrect, try again.';
            }

            if (awDiff >= 1) {
                $('#guessWidth').value = '';
            }
        }

        setFinish();
    </script>
</body>

</html>