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public_html/gamla-kurser/webbutv2/övningar/js_timers/
js_timers_a.html
js_timers_b.html
js_timers_c.html
js_timers_d.html
js_timers_e.html
js_timers_f.html
js_timers_g.html
js_timers_h.html
js_timers_i.html
js_timers_j.html
sound/
js_timers_g.html
111 lines UTF-8 Windows (CRLF)
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>JS Timers G</title>
<style>
.hidden {
visibility: hidden;
}
.timers-container {
display: flex;
justify-content: space-around;
}
.timer {
text-align: center;
}
</style>
</head>
<body>
<h1>JS Timers G</h1>
<button onclick="toggleTimers()" id="startButton">Start</button>
<div class="timers-container">
<div class="timer">
<h2>Klocka 1</h2>
<h2 id="timer1">0.00 sekunder.</h2>
<h2 id="bell1" class="hidden">🔔</h2>
</div>
<div class="timer">
<h2>Klocka 2</h2>
<h2 id="timer2">0.00 sekunder.</h2>
<h2 id="bell2" class="hidden">🔔</h2>
</div>
<div class="timer">
<h2>Klocka 3</h2>
<h2 id="timer3">0.00 sekunder.</h2>
<h2 id="bell3" class="hidden">🔔</h2>
</div>
</div>
<script>
// Klocka 1
let timer1 = document.getElementById("timer1");
let bell1 = document.getElementById("bell1");
let count1 = 0;
let intervalId1;
function myTimer1() {
count1++;
timer1.innerHTML = "" + (count1 / 100).toFixed(2) + " sekunder.";
if (count1 % 200 === 0) { // 3 seconds
new Audio("./sound/bell.mp3").play();
bell1.classList.remove("hidden");
setTimeout(() => bell1.classList.add("hidden"), 500);
}
}
// Klocka 2
let timer2 = document.getElementById("timer2");
let bell2 = document.getElementById("bell2");
let count2 = 0;
let intervalId2;
function myTimer2() {
count2++;
timer2.innerHTML = "" + (count2 / 100).toFixed(2) + " sekunder.";
if (count2 % 300 === 0) { // 2 seconds
new Audio("./sound/bell.mp3").play();
bell2.classList.remove("hidden");
setTimeout(() => bell2.classList.add("hidden"), 500);
}
}
// Klocka 3
let timer3 = document.getElementById("timer3");
let bell3 = document.getElementById("bell3");
let count3 = 0;
let intervalId3;
function myTimer3() {
count3++;
timer3.innerHTML = "" + (count3 / 100).toFixed(2) + " sekunder.";
if (count3 % 400 === 0) { // 4 seconds
new Audio("./sound/bell.mp3").play();
bell3.classList.remove("hidden");
setTimeout(() => bell3.classList.add("hidden"), 500);
}
}
// Växla alla timers
let button = document.getElementById("startButton");
let active = false;
function toggleTimers() {
if (active) {
clearInterval(intervalId1);
clearInterval(intervalId2);
clearInterval(intervalId3);
button.innerHTML = "Start";
} else {
intervalId1 = setInterval(myTimer1, 10);
intervalId2 = setInterval(myTimer2, 10);
intervalId3 = setInterval(myTimer3, 10);
button.innerHTML = "Stop";
}
active = !active;
}
</script>
</body>
</html>