code-boxx/0-JS-SHOPPING-LIST.MD

## 0-JS-SHOPPING-LIST.MD

      
    Raw
  

              0-JS-SHOPPING-LIST.MD
            
          
    JAVASCRIPT SHOPPING LIST

https://code-boxx.com/shopping-list-vanilla-javascript/
IMAGES


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.

  
## 1-shop-list.css
/* (A) SHARED */
#shop-wrap input {
  padding: 10px;
  border: 0;
}
#shop-wrap input[type=button], #shop-wrap input[type=submit] {
  cursor: pointer;
  color: #fff;
  background: #5a75d6;
}
#shop-form, .item-row {
  display: flex;
  align-items: stretch;
}
#shop-item, .item-name { flex-grow: 1; }

/* (B) WRAPPER */
#shop-wrap {
  max-width: 500px;
  padding: 15px;
  background: #f2f2f2;
  border: 2px solid #eee;
}

/* (C) SHOPPING LIST */
.item-row { margin-top: 10px; }
.item-name {
  padding: 10px;
  background: #fff;
}
.item-name.item-got { background: #f5fffa; }
.item-name.item-got:before {
  content: "\02713";
  margin-right: 5px;
  font-weight: bold;
  color: #00d036;
}
.item-del { background: #de1919 !important; }

/* (X) WHOLE PAGE */
* {
  font-family: Arial, Helvetica, sans-serif;
  box-sizing: border-box;
}

## 1-shop-list.html
<!DOCTYPE html>
<html>
  <head>
    <title>
      Simple Javascript Shopping List
    </title>
    <meta charset="utf-8">

    <!-- WEB APP & ICONS -->
    <link rel="icon" href="favicon.png" type="image/png">
    <meta name="mobile-web-app-capable" content="yes">
    <meta name="theme-color" content="white">
    <link rel="apple-touch-icon" href="favicon.png">
    <meta name="apple-mobile-web-app-capable" content="yes">
    <meta name="apple-mobile-web-app-status-bar-style" content="black">
    <meta name="apple-mobile-web-app-title" content="JS Shopping List">
    <meta name="msapplication-TileImage" content="favicon.png">
    <meta name="msapplication-TileColor" content="#ffffff">

    <!-- WEB APP MANIFEST -->
    <!-- https://web.dev/add-manifest/ -->
    <link rel="manifest" href="3-manifest.json">

    <!-- SERVICE WORKER -->
    <script>if ("serviceWorker" in navigator) {
      navigator.serviceWorker.register("3-worker.js");
    }</script>

    <!-- STYLESHEET + JAVASCRIPT -->
    <link href="1-shop-list.css" rel="stylesheet">
    <script src="2-shop-list.js"></script>
  </head>
  <body>
    <h1>SHOPPING LIST</h1>
    <div id="shop-wrap">
      <!-- (A) ADD NEW ITEM -->
      <form id="shop-form">
        <input type="text" id="shop-item" placeholder="Item Name" required disabled>
        <input type="submit" id="shop-add" value="Add" disabled>
      </form>

      <!-- (B) SHOPPING LIST -->
      <div id="shop-list"></div>
    </div>
  </body>
</html>

## 2-shop-list.js
var slist = {
  // (A) INITIALIZE SHOPPING LIST
  items : [],   // current shopping list
  hform : null, // html add item <form>
  hitem : null, // html add item <input> field
  hadd : null,  // html add item submit button
  hlist : null, // html <div> shopping list
  init : () => {
    // (A1) GET HTML ELEMENTS
    slist.hform = document.getElementById("shop-form");
    slist.hitem = document.getElementById("shop-item");
    slist.hadd = document.getElementById("shop-add");
    slist.hlist = document.getElementById("shop-list");

    // (A2) "ACTIVATE" HTML ADD ITEM FORM
    slist.hitem.setAttribute("autocomplete", "off");
    slist.hform.onsubmit = slist.add;
    slist.hitem.disabled = false;
    slist.hadd.disabled = false;

    // (A3) RESTORE PREVIOUS SHOPPING LIST
    if (localStorage.items == undefined) { localStorage.items = "[]"; }
    slist.items = JSON.parse(localStorage.items);

    // (A4) DRAW HTML SHOPPING LIST
    slist.draw();
  },

  // (B) SAVE SHOPPING LIST INTO LOCAL STORAGE
  save : () => {
    if (localStorage.items == undefined) { localStorage.items = "[]"; }
    localStorage.items = JSON.stringify(slist.items);
  },

  // (C) ADD NEW ITEM TO THE LIST
  add : evt => {
    // (C1) PREVENT FORM SUBMIT
    evt.preventDefault();

    // (C2) ADD NEW ITEM TO LIST
    slist.items.push({
      name : slist.hitem.value, // item name
      done : false // true for "got it", false for "not yet"
    });
    slist.hitem.value = "";
    slist.save();

    // (C3) REDRAW HTML SHOPPING LIST
    slist.draw();
  },

  // (D) DELETE SELECTED ITEM
  delete : id => { if (confirm("Remove this item?")) {
    slist.items.splice(id, 1);
    slist.save();
    slist.draw();
  }},

  // (E) TOGGLE ITEM BETWEEN "GOT IT" OR "NOT YET"
  toggle : id => {
    slist.items[id].done = !slist.items[id].done;
    slist.save();
    slist.draw();
  },

  // (F) DRAW THE HTML SHOPPING LIST
  draw : () => {
    // (F1) RESET HTML LIST
    slist.hlist.innerHTML = "";

    // (F2) NO ITEMS
    if (slist.items.length == 0) {
      slist.hlist.innerHTML = "<div class='item-row item-name'>No items found.</div>";
    }

    // (F3) DRAW ITEMS
    else {
      for (let i in slist.items) {
        // ITEM ROW
        let row = document.createElement("div");
        row.className = "item-row";
        slist.hlist.appendChild(row);

        // ITEM NAME
        let name = document.createElement("div");
        name.innerHTML = slist.items[i].name;
        name.className = "item-name";
        if (slist.items[i].done) { name.classList.add("item-got"); }
        row.appendChild(name);

        // DELETE BUTTON
        let del = document.createElement("input");
        del.className = "item-del";
        del.type = "button";
        del.value = "Delete";;
        del.onclick = () => { slist.delete(i); };
        row.appendChild(del);

        // COMPLETED/NOT YET BUTTON
        let ok = document.createElement("input");
        ok.className = "item-ok";
        ok.type = "button";
        ok.value = slist.items[i].done ? "Not Yet" : "Got It";
        ok.onclick = () => { slist.toggle(i); };
        row.appendChild(ok);
      }
    }
  }
};
window.addEventListener("load", slist.init);

## 3-manifest.json
{
  "short_name": "JS Shopping List",
  "name": "JS Shopping List",
  "icons": [{
    "src": "favicon.png",
    "sizes": "512x512",
    "type": "image/png"
  }],
  "start_url": "shop-list.html",
  "scope": "/",
  "background_color": "white",
  "theme_color": "white",
  "display": "standalone"
}

## 3-worker.js
// (A) CREATE/INSTALL CACHE
self.addEventListener("install", evt => {
  self.skipWaiting();
  evt.waitUntil(
    caches.open("ShopList")
    .then(cache => cache.addAll([
      "favicon.png",
      "1-shop-list.css",
      "1-shop-list.html",
      "2-shop-list.js",
      "3-manifest.json"
    ]))
    .catch(err => console.error(err))
  );
});

// (B) CLAIM CONTROL INSTANTLY
self.addEventListener("activate", evt => self.clients.claim());

// (C) LOAD FROM CACHE FIRST, FALLBACK TO NETWORK IF NOT FOUND
self.addEventListener("fetch", evt => evt.respondWith(
  caches.match(evt.request).then(res => res || fetch(evt.request))
));
	/* (A) SHARED */
	#shop-wrap input {
	padding: 10px;
	border: 0;
	}
	#shop-wrap input[type=button], #shop-wrap input[type=submit] {
	cursor: pointer;
	color: #fff;
	background: #5a75d6;
	}
	#shop-form, .item-row {
	display: flex;
	align-items: stretch;
	}
	#shop-item, .item-name { flex-grow: 1; }

	/* (B) WRAPPER */
	#shop-wrap {
	max-width: 500px;
	padding: 15px;
	background: #f2f2f2;
	border: 2px solid #eee;
	}

	/* (C) SHOPPING LIST */
	.item-row { margin-top: 10px; }
	.item-name {
	padding: 10px;
	background: #fff;
	}
	.item-name.item-got { background: #f5fffa; }
	.item-name.item-got:before {
	content: "\02713";
	margin-right: 5px;
	font-weight: bold;
	color: #00d036;
	}
	.item-del { background: #de1919 !important; }

	/* (X) WHOLE PAGE */
	* {
	font-family: Arial, Helvetica, sans-serif;
	box-sizing: border-box;
	}
	<!DOCTYPE html>
	<html>
	<head>
	<title>
	Simple Javascript Shopping List
	</title>
	<meta charset="utf-8">

	<!-- WEB APP & ICONS -->
	<link rel="icon" href="favicon.png" type="image/png">
	<meta name="mobile-web-app-capable" content="yes">
	<meta name="theme-color" content="white">
	<link rel="apple-touch-icon" href="favicon.png">
	<meta name="apple-mobile-web-app-capable" content="yes">
	<meta name="apple-mobile-web-app-status-bar-style" content="black">
	<meta name="apple-mobile-web-app-title" content="JS Shopping List">
	<meta name="msapplication-TileImage" content="favicon.png">
	<meta name="msapplication-TileColor" content="#ffffff">

	<!-- WEB APP MANIFEST -->
	<!-- https://web.dev/add-manifest/ -->
	<link rel="manifest" href="3-manifest.json">

	<!-- SERVICE WORKER -->
	<script>if ("serviceWorker" in navigator) {
	navigator.serviceWorker.register("3-worker.js");
	}</script>

	<!-- STYLESHEET + JAVASCRIPT -->
	<link href="1-shop-list.css" rel="stylesheet">
	<script src="2-shop-list.js"></script>
	</head>
	<body>
	<h1>SHOPPING LIST</h1>
	<div id="shop-wrap">
	<!-- (A) ADD NEW ITEM -->
	<form id="shop-form">
	<input type="text" id="shop-item" placeholder="Item Name" required disabled>
	<input type="submit" id="shop-add" value="Add" disabled>
	</form>

	<!-- (B) SHOPPING LIST -->
	<div id="shop-list"></div>
	</div>
	</body>
	</html>
	var slist = {
	// (A) INITIALIZE SHOPPING LIST
	items : [], // current shopping list
	hform : null, // html add item <form>
	hitem : null, // html add item <input> field
	hadd : null, // html add item submit button
	hlist : null, // html <div> shopping list
	init : () => {
	// (A1) GET HTML ELEMENTS
	slist.hform = document.getElementById("shop-form");
	slist.hitem = document.getElementById("shop-item");
	slist.hadd = document.getElementById("shop-add");
	slist.hlist = document.getElementById("shop-list");

	// (A2) "ACTIVATE" HTML ADD ITEM FORM
	slist.hitem.setAttribute("autocomplete", "off");
	slist.hform.onsubmit = slist.add;
	slist.hitem.disabled = false;
	slist.hadd.disabled = false;

	// (A3) RESTORE PREVIOUS SHOPPING LIST
	if (localStorage.items == undefined) { localStorage.items = "[]"; }
	slist.items = JSON.parse(localStorage.items);

	// (A4) DRAW HTML SHOPPING LIST
	slist.draw();
	},

	// (B) SAVE SHOPPING LIST INTO LOCAL STORAGE
	save : () => {
	if (localStorage.items == undefined) { localStorage.items = "[]"; }
	localStorage.items = JSON.stringify(slist.items);
	},

	// (C) ADD NEW ITEM TO THE LIST
	add : evt => {
	// (C1) PREVENT FORM SUBMIT
	evt.preventDefault();

	// (C2) ADD NEW ITEM TO LIST
	slist.items.push({
	name : slist.hitem.value, // item name
	done : false // true for "got it", false for "not yet"
	});
	slist.hitem.value = "";
	slist.save();

	// (C3) REDRAW HTML SHOPPING LIST
	slist.draw();
	},

	// (D) DELETE SELECTED ITEM
	delete : id => { if (confirm("Remove this item?")) {
	slist.items.splice(id, 1);
	slist.save();
	slist.draw();
	}},

	// (E) TOGGLE ITEM BETWEEN "GOT IT" OR "NOT YET"
	toggle : id => {
	slist.items[id].done = !slist.items[id].done;
	slist.save();
	slist.draw();
	},

	// (F) DRAW THE HTML SHOPPING LIST
	draw : () => {
	// (F1) RESET HTML LIST
	slist.hlist.innerHTML = "";

	// (F2) NO ITEMS
	if (slist.items.length == 0) {
	slist.hlist.innerHTML = "<div class='item-row item-name'>No items found.</div>";
	}

	// (F3) DRAW ITEMS
	else {
	for (let i in slist.items) {
	// ITEM ROW
	let row = document.createElement("div");
	row.className = "item-row";
	slist.hlist.appendChild(row);

	// ITEM NAME
	let name = document.createElement("div");
	name.innerHTML = slist.items[i].name;
	name.className = "item-name";
	if (slist.items[i].done) { name.classList.add("item-got"); }
	row.appendChild(name);

	// DELETE BUTTON
	let del = document.createElement("input");
	del.className = "item-del";
	del.type = "button";
	del.value = "Delete";;
	del.onclick = () => { slist.delete(i); };
	row.appendChild(del);

	// COMPLETED/NOT YET BUTTON
	let ok = document.createElement("input");
	ok.className = "item-ok";
	ok.type = "button";
	ok.value = slist.items[i].done ? "Not Yet" : "Got It";
	ok.onclick = () => { slist.toggle(i); };
	row.appendChild(ok);
	}
	}
	}
	};
	window.addEventListener("load", slist.init);
	{
	"short_name": "JS Shopping List",
	"name": "JS Shopping List",
	"icons": [{
	"src": "favicon.png",
	"sizes": "512x512",
	"type": "image/png"
	}],
	"start_url": "shop-list.html",
	"scope": "/",
	"background_color": "white",
	"theme_color": "white",
	"display": "standalone"
	}
	// (A) CREATE/INSTALL CACHE
	self.addEventListener("install", evt => {
	self.skipWaiting();
	evt.waitUntil(
	caches.open("ShopList")
	.then(cache => cache.addAll([
	"favicon.png",
	"1-shop-list.css",
	"1-shop-list.html",
	"2-shop-list.js",
	"3-manifest.json"
	]))
	.catch(err => console.error(err))
	);
	});

	// (B) CLAIM CONTROL INSTANTLY
	self.addEventListener("activate", evt => self.clients.claim());

	// (C) LOAD FROM CACHE FIRST, FALLBACK TO NETWORK IF NOT FOUND
	self.addEventListener("fetch", evt => evt.respondWith(
	caches.match(evt.request).then(res => res \|\| fetch(evt.request))
	));