code-boxx/0-JS-ALARM.MD

## 0-JS-ALARM.MD

      
    Raw
  

              0-JS-ALARM.MD
            
          
    JAVASCRIPT ALARM CLOCK
https://code-boxx.com/simple-javascript-alarm-clock/
NOTES
Gist does not allow MP3 uploads... Do a "free alarm sound" search on your own, save it as wake-up-sound.mp3 in your project folder.
LICENSE
Copyright by Code Boxx
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

  
## js-alarm-clock.css
/* (A) SHARED */
#ctime *, #tpick * {
  font-family: Impact, sans-serif;
  box-sizing: border-box;
  text-align: center;
}
#ctime, #tpick, .square { padding: 10px; }
#ctime, #tpick {
  margin: 0 auto;
  max-width: 350px;
  display: flex;
  flex-wrap: wrap;
}
.header {
  font-weight: normal;
  width: 100%;
  margin: 10px 0;
}
.square, #tpick-h, #tpick-m, #tpick-s { width: 33%; }
.text, #tset, #treset { margin-top:10px; }
.digits, .square select {
  font-size: 24px;
  background: #fff;
  color: #000;
  border: 0;
  border-radius: 5px;
  width: 100%;
  padding: 10px 0;
}

/* (B) CURRENT TIME */
#ctime { background: #000; }
#ctime .header { color: #c61d1d; }
#ctime .text { color: #ddd; }

/* (C) TIME PICKER */
#tpick { background: #f2f2f2; }
#tset, #treset {
  width: 50%;
  background: #3368b2;
  color: #fff;
  border: 0;
  padding: 15px 0;
  cursor: pointer;
  font-size: 18px;
}
#tset:disabled, #treset:disabled {
  background: #aaa;
  color: #888;
}

## js-alarm-clock.html
<!DOCTYPE html>
<html>
  <head>
    <title>
      Javascript Alarm Clock Demo
    </title>
    <link href="js-alarm-clock.css" rel="stylesheet">
    <script defer src="js-alarm-clock.js"></script>
  </head>
  <body>
    <!-- (A) CURRENT TIME -->
    <div id="ctime">
      <h1 class="header">THE CURRENT TIME</h1>
      <div class="square">
        <div class="digits" id="chr">00</div>
        <div class="text">HR</div>
      </div>
      <div class="square">
        <div class="digits" id="cmin">00</div>
        <div class="text">MIN</div>
      </div>
      <div class="square">
        <div class="digits" id="csec">00</div>
        <div class="text">SEC</div>
      </div>
    </div>

    <!-- (B) SET ALARM -->
    <div id="tpick">
      <h1 class="header">SET ALARM</h1>
      <div id="tpick-h" class="square"></div>
      <div id="tpick-m" class="square"></div>
      <div id="tpick-s" class="square"></div>
      <input type="button" value="Set" id="tset">
      <input type="button" value="Reset" id="treset" disabled>
    </div>
  </body>
</html>

## js-alarm-clock.js
var ac = {
  // (A) HTML ELEMENTS & PROPERTIES
  // (A1) CLOCK HOUR, MIN, SEC
  chr : null, cmin : null, csec : null,

  // (A2) TIME PICKER HOUR, MIN, SEC, SET, RESET
  thr : null, thm : null, ths : null,
  tset : null, treset : null,

  // (A3) ALARM TIME & SOUND
  alarm : null, sound : null,

  // (B) INITIALIZE ALARM CLOCK
  init : () => {
    // (B1) GET HTML CURRENT TIME - HOUR, MIN, SECONDS
    ac.chr = document.getElementById("chr");
    ac.cmin = document.getElementById("cmin");
    ac.csec = document.getElementById("csec");

    // (B2) CREATE HTML TIME PICKER - HR, MIN, SEC
    ac.thr = ac.createSel(23);
    ac.thm = ac.createSel(59);
    ac.ths = ac.createSel(59);
    document.getElementById("tpick-h").appendChild(ac.thr);
    document.getElementById("tpick-m").appendChild(ac.thm);
    document.getElementById("tpick-s").appendChild(ac.ths);

    // (B3) CREATE HTML TIME PICKER - SET, RESET
    ac.tset = document.getElementById("tset");
    ac.treset = document.getElementById("treset");
    ac.tset.onclick = ac.set;
    ac.treset.onclick = ac.reset;

    // (B4) ALARM SOUND
    ac.sound = new Audio("wake-up-sound.mp3");

    // (B5) START THE CLOCK
    ac.alarm = null;
    setInterval(ac.tick, 1000);
  },

  // (C) SUPPORT FUNCTION - CREATE SELECTOR FOR HR, MIN, SEC
  createSel : max => {
    let selector = document.createElement("select"), opt;
    for (let i=0; i<=max; i++) {
      opt = document.createElement("option");
      i = ac.padzero(i);
      opt.value = i;
      opt.innerHTML = i;
      selector.appendChild(opt);
    }
    return selector;
  },

  // (D) SUPPORT FUNCTION - PREPEND HR, MIN, SEC WITH 0 (IF < 10)
  padzero : num => {
    if (num < 10) { num = "0" + num; }
    else { num = num.toString(); }
    return num;
  },

  // (E) UPDATE CURRENT TIME
  tick : () => {
    // (E1) CURRENT TIME
    let now = new Date(),
        hr = ac.padzero(now.getHours()),
        min = ac.padzero(now.getMinutes()),
        sec = ac.padzero(now.getSeconds());

    // (E2) UPDATE HTML CLOCK
    ac.chr.innerHTML = hr;
    ac.cmin.innerHTML = min;
    ac.csec.innerHTML = sec;

    // (E3) CHECK AND SOUND ALARM
    if (ac.alarm != null) {
      now = hr + min + sec;
      if (now == ac.alarm && ac.sound.paused) { ac.sound.play(); }
    }
  },

  // (F) SET ALARM
  set : () => {
    ac.alarm = ac.thr.value + ac.thm.value + ac.ths.value;
    ac.thr.disabled = true;
    ac.thm.disabled = true;
    ac.ths.disabled = true;
    ac.tset.disabled = true;
    ac.treset.disabled = false;
  },

  // (G) RESET ALARM
  reset : () => {
    if (!ac.sound.paused) { ac.sound.pause(); }
    ac.alarm = null;
    ac.thr.disabled = false;
    ac.thm.disabled = false;
    ac.ths.disabled = false;
    ac.tset.disabled = false;
    ac.treset.disabled = true;
  }
};

// (H) START CLOCK ON PAGE LOAD
window.addEventListener("load", ac.init);
	/* (A) SHARED */
	#ctime , #tpick {
	font-family: Impact, sans-serif;
	box-sizing: border-box;
	text-align: center;
	}
	#ctime, #tpick, .square { padding: 10px; }
	#ctime, #tpick {
	margin: 0 auto;
	max-width: 350px;
	display: flex;
	flex-wrap: wrap;
	}
	.header {
	font-weight: normal;
	width: 100%;
	margin: 10px 0;
	}
	.square, #tpick-h, #tpick-m, #tpick-s { width: 33%; }
	.text, #tset, #treset { margin-top:10px; }
	.digits, .square select {
	font-size: 24px;
	background: #fff;
	color: #000;
	border: 0;
	border-radius: 5px;
	width: 100%;
	padding: 10px 0;
	}

	/* (B) CURRENT TIME */
	#ctime { background: #000; }
	#ctime .header { color: #c61d1d; }
	#ctime .text { color: #ddd; }

	/* (C) TIME PICKER */
	#tpick { background: #f2f2f2; }
	#tset, #treset {
	width: 50%;
	background: #3368b2;
	color: #fff;
	border: 0;
	padding: 15px 0;
	cursor: pointer;
	font-size: 18px;
	}
	#tset:disabled, #treset:disabled {
	background: #aaa;
	color: #888;
	}
	<!DOCTYPE html>
	<html>
	<head>
	<title>
	Javascript Alarm Clock Demo
	</title>
	<link href="js-alarm-clock.css" rel="stylesheet">
	<script defer src="js-alarm-clock.js"></script>
	</head>
	<body>
	<!-- (A) CURRENT TIME -->
	<div id="ctime">
	<h1 class="header">THE CURRENT TIME</h1>
	<div class="square">
	<div class="digits" id="chr">00</div>
	<div class="text">HR</div>
	</div>
	<div class="square">
	<div class="digits" id="cmin">00</div>
	<div class="text">MIN</div>
	</div>
	<div class="square">
	<div class="digits" id="csec">00</div>
	<div class="text">SEC</div>
	</div>
	</div>

	<!-- (B) SET ALARM -->
	<div id="tpick">
	<h1 class="header">SET ALARM</h1>
	<div id="tpick-h" class="square"></div>
	<div id="tpick-m" class="square"></div>
	<div id="tpick-s" class="square"></div>
	<input type="button" value="Set" id="tset">
	<input type="button" value="Reset" id="treset" disabled>
	</div>
	</body>
	</html>
	var ac = {
	// (A) HTML ELEMENTS & PROPERTIES
	// (A1) CLOCK HOUR, MIN, SEC
	chr : null, cmin : null, csec : null,

	// (A2) TIME PICKER HOUR, MIN, SEC, SET, RESET
	thr : null, thm : null, ths : null,
	tset : null, treset : null,

	// (A3) ALARM TIME & SOUND
	alarm : null, sound : null,

	// (B) INITIALIZE ALARM CLOCK
	init : () => {
	// (B1) GET HTML CURRENT TIME - HOUR, MIN, SECONDS
	ac.chr = document.getElementById("chr");
	ac.cmin = document.getElementById("cmin");
	ac.csec = document.getElementById("csec");

	// (B2) CREATE HTML TIME PICKER - HR, MIN, SEC
	ac.thr = ac.createSel(23);
	ac.thm = ac.createSel(59);
	ac.ths = ac.createSel(59);
	document.getElementById("tpick-h").appendChild(ac.thr);
	document.getElementById("tpick-m").appendChild(ac.thm);
	document.getElementById("tpick-s").appendChild(ac.ths);

	// (B3) CREATE HTML TIME PICKER - SET, RESET
	ac.tset = document.getElementById("tset");
	ac.treset = document.getElementById("treset");
	ac.tset.onclick = ac.set;
	ac.treset.onclick = ac.reset;

	// (B4) ALARM SOUND
	ac.sound = new Audio("wake-up-sound.mp3");

	// (B5) START THE CLOCK
	ac.alarm = null;
	setInterval(ac.tick, 1000);
	},

	// (C) SUPPORT FUNCTION - CREATE SELECTOR FOR HR, MIN, SEC
	createSel : max => {
	let selector = document.createElement("select"), opt;
	for (let i=0; i<=max; i++) {
	opt = document.createElement("option");
	i = ac.padzero(i);
	opt.value = i;
	opt.innerHTML = i;
	selector.appendChild(opt);
	}
	return selector;
	},

	// (D) SUPPORT FUNCTION - PREPEND HR, MIN, SEC WITH 0 (IF < 10)
	padzero : num => {
	if (num < 10) { num = "0" + num; }
	else { num = num.toString(); }
	return num;
	},

	// (E) UPDATE CURRENT TIME
	tick : () => {
	// (E1) CURRENT TIME
	let now = new Date(),
	hr = ac.padzero(now.getHours()),
	min = ac.padzero(now.getMinutes()),
	sec = ac.padzero(now.getSeconds());

	// (E2) UPDATE HTML CLOCK
	ac.chr.innerHTML = hr;
	ac.cmin.innerHTML = min;
	ac.csec.innerHTML = sec;

	// (E3) CHECK AND SOUND ALARM
	if (ac.alarm != null) {
	now = hr + min + sec;
	if (now == ac.alarm && ac.sound.paused) { ac.sound.play(); }
	}
	},

	// (F) SET ALARM
	set : () => {
	ac.alarm = ac.thr.value + ac.thm.value + ac.ths.value;
	ac.thr.disabled = true;
	ac.thm.disabled = true;
	ac.ths.disabled = true;
	ac.tset.disabled = true;
	ac.treset.disabled = false;
	},

	// (G) RESET ALARM
	reset : () => {
	if (!ac.sound.paused) { ac.sound.pause(); }
	ac.alarm = null;
	ac.thr.disabled = false;
	ac.thm.disabled = false;
	ac.ths.disabled = false;
	ac.tset.disabled = false;
	ac.treset.disabled = true;
	}
	};

	// (H) START CLOCK ON PAGE LOAD
	window.addEventListener("load", ac.init);