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<!DOCTYPE html>
<!--
Copyright 2011 Google Inc.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
Original slides: Marcin Wichary (mwichary@google.com)
Modifications: Chrome DevRel Team (chrome-devrel@googlegroups.com)
Alex Russell (slightlyoff@chromium.org)
Brad Neuberg
-->
<html manifest="cache.appcache">
<head>
<meta charset="utf-8" />
<meta http-equiv="X-UA-Compatible" content="IE=Edge;chrome=1" />
<title>HTML5 Presentation</title>
<link href="http://fonts.googleapis.com/css?family=Droid+Sans|Droid+Sans+Mono" rel="stylesheet" type="text/css" />
<link id="prettify-link" href="src/prettify/prettify.css" rel="stylesheet" disabled />
<link href="styles/fonts.css" rel="stylesheet" type="text/css" media="screen" />
<link href="styles/presentation.css" rel="stylesheet" type="text/css" media="screen" />
<link href="styles/common.css" rel="stylesheet" type="text/css" media="screen" />
<link class="theme" href="styles/default.css" rel="stylesheet" type="text/css" media="screen" />
<link class="theme" href="styles/moon.css" rel="stylesheet" type="text/css" media="screen" />
<link class="theme" href="styles/sand.css" rel="stylesheet" type="text/css" media="screen"/>
<link class="theme" href="styles/sea_wave.css" rel="stylesheet" type="text/css" media="screen"/>
</head>
<body>
<div id="flex-container">
<nav id="helpers">
<button title="Previous slide" id="nav-prev" class="nav-prev">⇽</button>
<button title="Jump to a random slide" id="slide-no">5</button>
<button title="Next slide" id="nav-next" class="nav-next">⇾</button>
<menu>
<button type="checkbox" data-command="toc" title="Table of Contents" class="toc">TOC</button>
<!-- <button type="checkbox" data-command="resources" title="View Related Resources">☆</button> -->
<button type="checkbox" data-command="notes" title="View Slide Notes">✏</button>
<button type="checkbox" data-command="source" title="View slide source">↻</button>
<button type="checkbox" data-command="help" title="View Help">?</button>
</menu>
</nav>
<div class="slides">
<div id="presentation-counter">Loading...</div>
<div class="slide" id="landing-slide">
<section class="middle">
<p>This presentation is an HTML5 website</p>
<div update>This deck was last updated mid-2011. While the basics of HTML5 remain the same,
many newer APIs are available, and a few APIs have changed during the standardization process.
See <a href="http://html5rocks.com">HTML5 Rocks</a> for up-to-date information. <small>~February 2014</small></div>
<p>Press <span id="left-init-key" class="key">→</span> key to advance.</p>
<p id="disclaimer-message">Having issues seeing the presentation? Read the <a href="disclaimer.html">disclaimer</a></p>
</section>
<aside class="note">
<section>
Welcome! (This field is for speaker notes and commentary.)
</section>
</aside>
</div>
<div class="slide" id="controls-slide">
<header>Slides controls</header>
<section>
<ul>
<li><span class="key">←</span> and <span class="key">→</span> to move around.</li>
<li><span class="key">Ctrl/Command</span> and <span class="key">+</span> or <span class="key">-</span> to zoom in and out if slides don’t fit.</li>
<li><span class="key">S</span> to view page source.</li>
<li><span class="key">T</span> to change the theme.</li>
<li><span class="key">H</span> to toggle syntax highlight.</li>
<li><span class="key">N</span> to toggle speaker notes.</li>
<li><span class="key">3</span> to toggle 3D effect.</li>
<li><span class="key">0</span> to toggle help.</li>
</ul>
</section>
</div>
<div class="slide" id="title-slide">
<section class="middle">
<hgroup>
<h1>
HTML5*
</h1>
<h2>
Web Development to the next level
</h2>
</hgroup>
<p>*Including other next generation technologies of the Web Development stack</p>
</section>
</div>
<div class="slide" id="timeline-slide">
<header>Rough Timeline of Web Technologies</header>
<section>
<ul id="timeline">
<li data-auto><span class="year">1991</span> <span class="html">HTML</span></li>
<li data-auto><span class="year">1994</span> <span class="html">HTML 2</span></li>
<li data-auto><span class="year">1996</span> <span class="css">CSS 1</span> + <span class="js">JavaScript</span></li>
<li data-auto><span class="year">1997</span> <span class="html">HTML 4</span></li>
<li data-auto><span class="year">1998</span> <span class="css">CSS 2</span></li>
<li data-auto><span class="year">2000</span> <span class="html">XHTML 1</span></li>
<li><span class="year"><em class="stroke">2002</em></span> <span class="css">Tableless Web Design</span></li>
<li><span class="year"><em class="stroke">2005</em></span> <span class="js">AJAX</span></li>
<li><span class="year"><em class="stroke">2009</em></span> <span class="html">HTML 5</span></li>
</ul>
</section>
</div>
<div class="slide" id="formula-intro-slide">
<section class="middle formula" data-build>
HTML5 ~=
<span class="html">HTML</span>
+
<span class="css">CSS</span>
+
<span class="js">JS</span>
</section>
</div>
<div class="slide" id="table-of-contents">
<header><h1>Today, we will cover...</h1></header>
<section>
<ul id="toc-list">
</ul>
</section>
</div>
<div class="slide transitionSlide" id="offline-storage-title">
<section class="middle">
<h2>Offline / Storage</h2>
<p>Expect the unexpected</p>
<img src="http://www.html5rocks.com/static/images/identity/classes_64/HTML5_Offline_Storage_64.png" title="HTML5 Offline & Storage" alt="HTML5 Offline & Storage">
</section>
</div>
<div class="slide offline-storage" id="web-storage">
<header><span class="js">JS</span> <h1>Web Storage</h1></header>
<section>
<pre>
// use localStorage for persistent storage
// use sessionStorage for per tab storage
saveButton.addEventListener('click', function () {
window.<b>localStorage</b>.<b>setItem</b>('value', area.value);
window.<b>localStorage</b>.<b>setItem</b>('timestamp', (new Date()).getTime());
}, false);
textarea.value = window.<b>localStorage</b>.<b>getItem</b>('value');
</pre>
<p id="localstorage-message">Save text value on the client side (crash-safe)</p>
<textarea id="ta" placeholder="Type your text here..."></textarea>
<button id="save-ta">Save</button>
<p id="ta-log"></p>
<script defer>
(function(){
try {
(window.localStorage.getItem) // will throw in Firefox under some settings
} catch(e){
return; // quit because dom.storage.enabled is false
}
var area = document.querySelector('#ta');
// place content from previous edit
if (!area.value) {
area.value = window.localStorage.getItem('value');
}
updateLog(false);
// your content will be saved locally
document.querySelector('#save-ta').addEventListener('click', function () {
window.localStorage.setItem('value', area.value);
window.localStorage.setItem('timestamp', (new Date()).getTime());
updateLog(true);
}, false);
function updateLog(new_save) {
var log = document.querySelector("#ta-log");
var delta = 0;
if (window.localStorage.getItem('value')) {
delta = ((new Date()).getTime() - (new Date()).setTime(window.localStorage.getItem('timestamp'))) / 1000;
if (new_save) {
log.textContent = 'Saved. Content will be available after browser refresh/reopen.';
setTimeout(function() {
log.textContent = '';
}, 3000);
} else {
log.textContent = 'last saved: ' + delta + 's ago';
}
}
}
})();
</script>
</section>
</div>
<div class="slide offline-storage" id="web-sql-db">
<header><span class="js">JS</span> <h1>Web SQL Database</h1></header>
<section>
<pre>var db = window.<b>openDatabase</b>("DBName", "1.0", "description", 5*1024*1024); //5MB
db.<b>transaction</b>(function(tx) {
tx.<b>executeSql</b>(<em>"SELECT * FROM test"</em>, [], successCallback, errorCallback);
});
</pre>
<div class="center" id="websqldb-example">
<input type="text" id="todoitem" />
<button onclick="webSqlSample.newRecord()">new to do item</button>
<button onclick="webSqlSample.createTable()">create table</button>
<button onclick="webSqlSample.dropTable()">drop table</button>
<p>See the generated database: Developer > Developer Tools > Storage</p>
<ul class="record-list" id="db-results"></ul>
<div id="db-log"></div>
</div>
<script defer>
var webSqlSample = (function() {
var db;
var log = document.getElementById('db-log');
if (window.openDatabase) {
db = openDatabase("DBTest", "1.0", "HTML5 Database API example", 200000);
showRecords();
}
document.getElementById('db-results').addEventListener('click', function(e) { e.preventDefault(); }, false);
function onError(tx, error) {
log.innerHTML = '<p class="error">Error: ' + error.message + '</p>';
}
// select all records and display them
function showRecords() {
document.getElementById('db-results').innerHTML = '';
db.transaction(function(tx) {
tx.executeSql("SELECT * FROM Table1Test", [], function(tx, result) {
for (var i = 0, item = null; i < result.rows.length; i++) {
item = result.rows.item(i);
document.getElementById('db-results').innerHTML +=
'<li><span contenteditable="true" onkeyup="webSqlSample.updateRecord('+item['id']+', this)">'+
item['text'] + '</span> <a href="#" onclick="webSqlSample.deleteRecord('+item['id']+')">[Delete]</a></li>';
}
});
});
}
function createTable() {
db.transaction(function(tx) {
tx.executeSql("CREATE TABLE Table1Test (id REAL UNIQUE, text TEXT)", [],
function(tx) { log.innerHTML = '<p>"Table1Test" created!</p>' },
onError);
});
}
// add record with random values
function newRecord() {
var num = Math.round(Math.random() * 10000); // random data
db.transaction(function(tx) {
tx.executeSql("INSERT INTO Table1Test (id, text) VALUES (?, ?)", [num, document.querySelector('#todoitem').value],
function(tx, result) {
log.innerHTML = '';
showRecords();
},
onError);
});
}
function updateRecord(id, textEl) {
db.transaction(function(tx) {
tx.executeSql("UPDATE Table1Test SET text = ? WHERE id = ?", [textEl.innerHTML, id], null, onError);
});
}
function deleteRecord(id) {
db.transaction(function(tx) {
tx.executeSql("DELETE FROM Table1Test WHERE id=?", [id],
function(tx, result) { showRecords() },
onError);
});
}
// delete table from db
function dropTable() {
db.transaction(function(tx) {
tx.executeSql("DROP TABLE Table1Test", [],
function(tx) { showRecords() },
onError);
});
}
return {
newRecord: newRecord,
createTable: createTable,
updateRecord: updateRecord,
deleteRecord: deleteRecord,
dropTable: dropTable
}
})();
</script>
</section>
</div>
<div class="slide offline-storage" id="indexed-db">
<header><span class="js">JS</span> <h1>IndexedDB</h1></header>
<section>
<pre>var idbRequest = window.<b>indexedDB</b>.<b>open</b>('Database Name');
idbRequest.onsuccess = function(event) {
<b>var db = event.srcElement.result</b>;
var transaction = db.<b>transaction</b>([], <b>IDBTransaction.READ_ONLY</b>);
var curRequest = transaction.<b>objectStore</b>('ObjectStore Name').<b>openCursor</b>();
curRequest.<b>onsuccess</b> = ...;
};
</pre>
<div class="center" id="indexeddb-example">
<input type="text" placeholder="key" id="idb-key" size="10" /> <input type="text" placeholder="value" id="idb-value" size="15" />
<button onclick="indexedDbSample.idbSet()">set</button>
<button onclick="indexedDbSample.idbCreate()">create objectStore</button>
<button onclick="indexedDbSample.idbRemove()">remove objectStore</button>
<div id="idb-log"></div>
<div class="record-list" id="idb-results-wrapper"></div>
</div>
<script defer>
var indexedDbSample = (function() {
var idb_;
var idbRequest_;
var idbLog_ = document.getElementById('idb-log');
var idResultsWrapper_ = document.getElementById('idb-results-wrapper');
// IndexedDB spec is still evolving, various browsers keep it
// behind various flags and implementation varies.
if ('webkitIndexedDB' in window) {
window.indexedDB = window.webkitIndexedDB;
window.IDBTransaction = window.webkitIDBTransaction;
} else if ('moz_indexedDB' in window) {
window.indexedDB = window.moz_indexedDB;
}
// Open our IndexedDB if the browser supports it.
if (window.indexedDB) {
idbRequest_ = window.indexedDB.open("Test", "A test object store.");
idbRequest_.onerror = idbError_;
idbRequest_.addEventListener('success', function(event) {
idb_ = event.srcElement.result;
idbShow_(event);
}, false);
}
function idbError_(event) {
idbLog_.innerHTML += '<p class="error">Error: ' +
event.message + ' (' + event.code + ')</p>';
}
function idbShow_(event) {
if (!idb_.objectStoreNames.contains('myObjectStore')) {
idbLog_.innerHTML = "<p>Object store not yet created.</p>";
return;
}
var html = [];
var transaction = idb_.transaction([], IDBTransaction.READ_ONLY); // Read is default.
var request = transaction.objectStore('myObjectStore').openCursor(); // Get all results.
// This callback will continue to be called until we have no more results.
request.onsuccess = function(e) {
var cursor = e.srcElement.result;
if (!cursor) {
idResultsWrapper_.innerHTML = '<ul class="record-list" id="idb-results">' + html.join('') + '</ul>';
return;
}
html.push('<li><span class="keyval" contenteditable onblur="indexedDbSample.updateKey(\'',
cursor.key, '\', this)">', cursor.key, '</span> ',
'=> <span class="keyval" contenteditable onblur="indexedDbSample.updateValue(\'',
cursor.key, '\', this)">', cursor.value, '</span> ',
'<a href="javascript:void(0)" onclick="indexedDbSample.deleteKey(\'',
cursor.key, '\')">[Delete]</a></li>');
cursor['continue']();
}
request.onerror = idbError_;
}
function idbCreate_() {
if (!idb_) {
if (idbRequest_) {
idbRequest_.addEventListener('success', removeObjectStore, false); // If indexedDB is still opening, just queue this up.
}
return;
}
var request = idb_.setVersion('the new version string');
request.onerror = idbError_;
request.onsuccess = function(e) {
if (!idb_.objectStoreNames.contains('myObjectStore')) {
try {
var objectStore = idb_.createObjectStore('myObjectStore', null); // FF is requiring the 2nd keyPath arg. It can be optional :(
idbLog_.innerHTML = "<p>Object store created.</p>";
} catch (err) {
idbLog_.innerHTML = '<p class="error">' + err.toString() + '</p>';
}
} else {
idbLog_.innerHTML = '<p class="error">Object store already exists.</p>';
}
}
}
function idbSet_() {
if (!idb_) {
if (idbRequest_) {
idbRequest_.addEventListener('success', removeObjectStore, false); // If indexedDB is still opening, just queue this up.
}
return;
}
if (!idb_.objectStoreNames.contains('myObjectStore')) {
idbLog_.innerHTML = "<p class=\"error\">Object store doesn't exist.</p>";
return;
}
// Create a transaction that locks the world.
var objectStore = idb_.transaction([], IDBTransaction.READ_WRITE)
.objectStore("myObjectStore");
var request = objectStore.put(
document.getElementById('idb-value').value,
document.getElementById('idb-key').value);
request.onerror = idbError_;
request.onsuccess = idbShow_;
}
function updateKey_(key, element) {
var newKey = element.textContent;
var transaction = idb_.transaction([], IDBTransaction.READ_WRITE); // Create a transaction that locks the world.
var objectStore = transaction.objectStore("myObjectStore");
var request = objectStore.get(key);
request.onerror = idbError_;
request.onsuccess = function(event) {
var value = event.srcElement.result;
var request;
if (objectStore['delete']) {
request = objectStore['delete'](key);
} else {
request = objectStore.remove(key);
}
request.onerror = idbError_;
request.onsuccess = function(event) {
var request = objectStore.add(value, newKey);
request.onerror = idbError_;
request.onsuccess = idbShow_;
};
};
}
function updateValue_(key, element) {
var transaction = idb_.transaction([], IDBTransaction.READ_WRITE); // Create a transaction that locks the world.
var objectStore = transaction.objectStore("myObjectStore");
var request = objectStore.put(element.textContent, key);
request.onerror = idbError_;
request.onsuccess = idbShow_;
}
function deleteKey_(key) {
var transaction = idb_.transaction([], IDBTransaction.READ_WRITE); // Create a transaction that locks the world.
var objectStore = transaction.objectStore("myObjectStore");
var request;
if (objectStore['delete']) {
request = objectStore['delete'](key);
} else {
request = objectStore.remove(key);
}
request.onerror = idbError_;
request.onsuccess = idbShow_;
}
function idbRemove_() {
if (!idb_) {
if (idbRequest_) {
idbRequest_.addEventListener('success', removeObjectStore, false); // If indexedDB is still opening, just queue this up.
}
return;
}
var request = idb_.setVersion("the new version string");
request.onerror = idbError_;
request.onsuccess = function(event) {
if (idb_.objectStoreNames.contains('myObjectStore')) {
try {
// Spec has been updated to deleteObjectStore.
if (idb_.deleteObjectStore) {
idb_.deleteObjectStore('myObjectStore');
} else {
idb_.removeObjectStore('myObjectStore');
}
idResultsWrapper_.innerHTML = '';
idbLog_.innerHTML = "<p>Object store removed.</p>";
} catch (err) {
idbLog_.innerHTML = '<p class="error">' + err.toString() + '</p>';
}
} else {
idbLog_.innerHTML = "<p class=\"error\">Object store doesn't exist.</p>";
}
};
}
return {
idbSet: idbSet_,
idbCreate: idbCreate_,
idbRemove: idbRemove_,
updateKey: updateKey_,
updateValue: updateValue_,
deleteKey: deleteKey_
}
})();
</script>
</section>
</div>
<div class="slide offline-storage" id="app-cache">
<header><span class="js">JS</span> <h1>Application Cache</h1></header>
<section class="appcache-examples">
<pre><html <b>manifest="cache.appcache"</b>></pre>
<pre>
window.<b>applicationCache</b>.addEventListener('updateready', function(e) {
if (window.<b>applicationCache</b>.<b>status</b> == window.<b>applicationCache</b>.<b>UPDATEREADY</b>) {
window.<b>applicationCache</b>.<b>swapCache()</b>;
if (confirm('A new version of this site is available. Load it?')) {
window.location.reload();
}
}
}, false);
</pre>
cache.appcache:
<pre>CACHE MANIFEST
# version 1.0.0
CACHE:
/html5/src/logic.js
/html5/src/style.css
/html5/src/background.png
NETWORK:
*
</pre>
<p id="appcache-message">Turn off your internet connection and refresh this page!
<img src="src/refresh.png" onclick="window.location.reload();"/></p>
</section>
</div>
<div class="slide offline-storage" id="quota-api">
<header><span class="js">JS</span> <h1>Quota API</h1></header>
<style>
#quota-api table {
width: 100%;
border-collapse: collapse;
margin-top: 40px;
}
#quota-api th {
font-weight: 600;
text-align: left;
}
#quota-api td,
#quota-api th {
border: 1px solid #222;
padding: 5px 10px;
vertical-align: top;
}
.quota-info-bubble {
background-color: #FCFCE4;
border: 1px solid yellow;
font-size: 80%;
padding: 5px;
}
.quota-info-bubble input, .quota-info-bubble button {
font-size: 12px;
}
.quota-info-bubble span {
display: block;
}
</style>
<section>
<pre style="font-size: 80%">
// Request Status
<b>webkitStorageInfo</b>.<b>queryUsageAndQuota</b>(webkitStorageInfo.TEMPORARY, function(used, remaining) {
console.log("Used quota: " + used + ", remaining quota: " + remaining);
}
);
// Request Quota (only for File System API)
<b>webkitStorageInfo</b>.<b>requestQuota</b>(webkitStorageInfo.PERSISTENT, 10 * 1024 * 1024, function(used) {
console.log("Used quota: " + used + ", remaining quota: " + remaining);
}
);</pre>
<table border="0" cellspacing="5" cellpadding="5">
<tr><th></th><th>Default (Temporary)</th><th>Quota Requested (Persistent)</th></tr>
<tr><td>Web Storage</td><td>5Mb</td><td rowspan="4">N/A</td></tr>
<tr><td>App Cache</td><td rowspan="4">10% of available disk in total<div class="quota-info-bubble"><button id="temp-query">Show Usage</button><span>Used: <output>--</output> Bytes</span><span>Remaining: <output>--</output> Bytes</span></div></td></tr>
<tr><td>IndexedDB</td></tr>
<tr><td>WebSQL</td></tr>
<tr><td>File System API</td><td>Arbitrary<div class="quota-info-bubble"><input id="requested-quota" type="text" placeholder="Request quota amount..."/> in Bytes <button id="perm-request" style="margin-left: 5px">Request Quota</button><span>Used: <output>--</output> Bytes</span></div></td></tr>
</table>
</section>
<script>
(function() {
var outputs = document.querySelectorAll('#quota-api output');
document.querySelector('#temp-query').addEventListener(
'click', function() {
webkitStorageInfo.queryUsageAndQuota(
webkitStorageInfo.TEMPORARY,
function(used, remaining) {
outputs[0].textContent = used;
outputs[1].textContent = remaining;
}, function(error) { alert(error) });
}, false);
document.querySelector('#perm-request').addEventListener(
'click', function() {
webkitStorageInfo.requestQuota(
webkitStorageInfo.PERSISTENT,
document.querySelector('#requested-quota').value,
function(used) {
outputs[2].textContent = used;
}, function(error) { alert(error) });
}, false);
}())
</script>
</div>
<div class="slide transitionSlide" id="realtime-title">
<section class="middle">
<h2>Realtime / Communication</h2>
<p>Stay connected</p>
<img src="http://www.html5rocks.com/static/images/identity/classes_64/HTML5_Connectivity_64.png" title="HTML5 Realtime & Communication" alt="HTML5 Realtime & Communication">
</section>
</div>
<div class="slide realtime-communication" id="web-workers">
<header><span class="js">JS</span> <h1>Web Workers</h1></header>
<section>
main.js:
<pre>
var worker = new <b>Worker</b>('task.js');
worker.<b>onmessage</b> = function(event) { alert(event.data); };
worker.<b>postMessage</b>('data');
</pre>
task.js:
<pre>
self.<b>onmessage</b> = function(event) {
// Do some work.
self.<b>postMessage</b>("recv'd: " + event.data);
};
</pre>
<div id="w-wrapper">
<div id="wmap" class="gmap example">
<img src="http://maps.google.com/maps/api/staticmap?center=13,13&zoom=3&size=680x200&sensor=false"/>
</div>
<div style="margin-top:5px">
<button id="find-route-y">Find route with Workers</button>
<button id="find-route-n">Find route without Workers</button>
<p id="w-loading">Loading Route...</p>
</div>
<p style="font-size: 90%;" class="center">Try dragging the map while the complex route is being calculated (you will only be able to do that with Workers!)</p>
</div>
<script src="src/webworkers/points.js" defer></script>
<script src="src/webworkers/annealing.js" defer></script>
<script defer>
(function() {
var markersArray = [];
var map = null;
var useThreads = false;
document.querySelector('#w-wrapper').addEventListener('click', function(event) {
if (!map) {
map = new google.maps.Map(document.querySelector('#wmap'), {
zoom: 3,
center: new google.maps.LatLng(13, 13),
mapTypeId: google.maps.MapTypeId.ROADMAP
});
map.getDiv().style.border = '1px solid #ccc';
drawPoints();
}
if (event.target.id == 'find-route-y') {
useThreads = true;
document.querySelector('#w-loading').style.visibility = 'visible';
test();
} else if (event.target.id == 'find-route-n'){
useThreads = false;
document.querySelector('#w-loading').style.visibility = 'visible';
// this setTimout is so that we see the 'loading' label
setTimeout(function() { test(); }, 10);
}
}, false);
function drawPath(path) {
var firstPoint = true;
var l = p1.length;
var scaleFactor = 5;
for (var i = 0; i < l - 1; ++i) {
var points = [
new google.maps.LatLng(p1[i].x / scaleFactor,
p1[i].y / scaleFactor),
new google.maps.LatLng(p1[i + 1].x / scaleFactor,
p1[i + 1].y / scaleFactor)
];
var polyline = new google.maps.Polyline(
{path: points, strokeColor: '#ff0000', strokeWeight: 1});
markersArray.push(polyline);
polyline.setMap(map);
}
}
function drawPoints() {
var blueIcon = new google.maps.MarkerImage(
'src/webworkers/point.png',
new google.maps.Size(3, 3), // size
new google.maps.Point(0, 0), // origin
new google.maps.Point(0, 0)); // anchor
for (var i = 0; i < p1.length; ++i) {
// Render in Gmap instead of canvas
var point = new google.maps.LatLng(p1[i].x / 5, p1[i].y / 5);
var marker = new google.maps.Marker({
position: point, icon: blueIcon, map: map});
markersArray.push(marker);
}
}
function deleteOverlays() {
if (markersArray) {
for (var i in markersArray) {
markersArray[i].setMap(null);
}
markersArray = [];
}
}
function test() {
var name = "Test 1";
var self = this;
deleteOverlays();
drawPoints();
setTimeout(function() {
var opts = {
points: p1,
t0: 1,
g: 0.99,
stepsPerT: 10
};
var callback = {
name: name,
newMin: function(p) {
},
draw: function(p) {
document.querySelector('#w-loading').style.visibility = 'hidden';
drawPath(p);
}
};
var a;
if (useThreads) {
var worker = new Worker('src/webworkers/Worker.js')
worker.onmessage = function(event) {
var returnedData = JSON.parse(event.data);
var msg = returnedData[0];
var p = returnedData[1];
callback[msg](p);
};
worker.onerror = function(event) {
console.log(event);
};
worker.postMessage(JSON.stringify({
opts: opts,
width: 200,
height: 200
}));
} else {
var annealing = new Annealing();
var callback2 = {
onNewMin: function(p) {
// postMessage('newmin')
},
onDone: function(p) {
document.querySelector('#w-loading').style.visibility = 'hidden';
drawPath(p);
}
};
annealing.init(opts, opts.width, opts.height, callback2);
annealing.go();
}
}, 10);
}
})();
</script>
</section>
</div>
<div class="slide realtime-communication" id="web-sockets">
<header><span class="js">JS</span> <h1>WebSocket</h1></header>
<section>
<pre>var socket = new <b>WebSocket</b>('ws://html5rocks.websocket.org/echo');
socket.<b>onopen</b> = function(event) {
socket.<b>send</b>('Hello, WebSocket');
};
socket.<b>onmessage</b> = function(event) { alert(event.data); }
socket.<b>onclose</b> = function(event) { alert('closed'); }
</pre>
<p id="websockets-message">Full-duplex, bi-directional communication over the Web:
Both the server and client can send data at any time, or even at the same time.
Only the data itself is sent, without the overhead of HTTP headers, dramatically
reducing bandwidth.</p>
<div id="ws-left">
Use the echo demo below to test a WebSocket connection from your browser.
Both the message you send and the response you receive travel over the same WebSocket connection.
<div id="ws-config-location">
<h4>Location:</h4>
<input type="text" id="wsUri" disabled />
<br>
<input type="checkbox" id="wsSecureCb" onclick="wsToggleTls();" disabled />
<label id="wsSecureCbLabel" for="wsSecureCb">Use secure WebSocket (TLS/SSL)</label>
<br>
<button id="wsConnectBut" disabled>Connect</button>
<button id="wsDisconnectBut" disabled>Disconnect</button>
</div>
<div id="ws-config-message">
<h4>Message:</h4>
<input type="text" id="wsMessage" value="Hello, WebSocket" disabled />
<button id="wsSendBut" disabled>Send</button>
</div>
</div>
<div id="ws-right">
<div id="ws-log">
<strong>Output:</strong>
<div id="wsConsoleLog"></div>
<button id="wsClearLogBut">Clear log</button>
</div>
</div>
<div id="ws-powered">
Demo powered by <a href="http://kaazing.com" target="_blank"><img id="wsKaazingLogo" src="src/websocket/kaazing-logo_99x16.png" width="99" height="16" alt="Powered by Kaazing" /></a>
</div>
</section>
<script src="src/websocket/websocket.js" defer></script>
</div>
<div class="slide realtime-communication" id="notifications-api">
<header><span class="js">JS</span> <h1>Notifications</h1></header>
<section>
<pre>if (window.<b>webkitNotifications</b>.<b>checkPermission</b>() == 0) {
// you can pass any url as a parameter
window.<b>webkitNotifications</b>.<b>createNotification</b>(tweet.picture, tweet.title,
tweet.text).<b>show</b>();
} else {
window.<b>webkitNotifications</b>.<b>requestPermission</b>();
}
</pre>
<div id="notifications-message">
<p>
<button id="request-permission" href="#">Set notification permissions for this page</button>
</p>
<p>Note: Use this button if you also want to <em>reset</em> the permissions</p>
<br>
<p>Enter your twitter user name to show your last tweet as a notification</p>
<input type="text" id="username" placeholder="username" />
<button id="show-tweets">Show tweet notifications</button>
</div>
<script defer>
document.getElementById('request-permission').addEventListener('click', function() {
window.webkitNotifications.requestPermission();
}, false);
document.getElementById('show-tweets').addEventListener('click', function() {
readTweets();
}, false);
function readTweets() {
var username = document.getElementById('username').value;
if (username == 'username') {
alert('Enter a username first');
return;
}
var script = document.createElement("script");
script.src = 'http://twitter.com/statuses/user_timeline/'+ username+'.json?count=1&callback=fetchTweets';
document.body.appendChild(script);
}
function fetchTweets(data) {
var tweet;
var i = data.length;
while (i--) {
tweet = data[i];
if (window.webkitNotifications.checkPermission() == 0) {
// note the show()
window.webkitNotifications.createNotification(tweet.user.profile_image_url, tweet.user.name, tweet.text).show();
} else {
// Note that we can't call requestPermission from here as we are in the callback function and not triggered just on user action
alert('You have to click on "Set notification permissions for this page" first to be able to receive notifications.');
return;
}
}
}
</script>
</section>
</div>
<div class="slide transitionSlide" id="hardware-access-title">
<section class="middle">
<h2>File / Hardware Access</h2>
<p>Deeper integration with the Operating System</p>
<img src="http://www.html5rocks.com/static/images/identity/classes_64/HTML5_Device_Access_64.png" title="HTML5 Device Access" alt="HTML5 Device Access">
</section>
</div>
<div class="slide device-access" id="native-drag-and-drop">
<header><span class="js">JS</span> <h1>Native Drag & Drop</h1></header>
<section id="dnd-section">
<pre>document.addEventListener(<em>'dragstart'</em>, function(event) {
event.<b>dataTransfer.setData</b>('text', 'Customized text');
event.<b>dataTransfer.effectAllowed</b> = 'copy';
}, false);
</pre>
<ol id="drag-zone">
<li><img src="src/dwd1.png" draggable class="copy" /></li>
<li><span class="draggable-text" draggable>Select text and drag (original text will be dropped)</span></li>
<li><span class="draggable-text" draggable class="overwrite">Select text and drag (dragged text data will be altered from original)</span></li>
</ol>
<div id="drop-data">Source Data</div>
<div id="drop-zone">Drop Area</div>
<script defer>
(function() {
var dragZone = document.querySelector('#drag-zone');
var dropZone = document.querySelector('#drop-zone');
dragZone.addEventListener('dragstart', function(event) {
if (event.target.className) { // img case
event.dataTransfer.effectAllowed = event.target.className;
event.target.style.border = "4px solid #cc3300";
}
else { // text case
if (event.target.parentNode.className == 'overwrite') {
event.dataTransfer.setData("text", "<strong>Overwritten Content</strong>");
}
event.target.parentNode.style.border = "4px solid #cc3300";
}
return true;
}, true);
dragZone.addEventListener('dragend', function(event) {
if (event.target.className) { // img case
event.target.style.border = "4px solid #888";
}
else { // text case
event.target.parentNode.style.border = "4px solid #888";
}
return true;
}, true);
dropZone.addEventListener('dragenter', function(event) {
if (event.preventDefault) event.preventDefault();
event.dataTransfer.dropEffect = 'copy';
this.className = 'hovering';
return false;
}, false);
dropZone.addEventListener('dragover', function(event) {
if (event.preventDefault) event.preventDefault(); // allows us to drop
event.dataTransfer.dropEffect = 'copy';
return false;
}, false);
dropZone.addEventListener('dragleave', function(event) {
if (event.preventDefault) event.preventDefault(); // allows us to drop
this.className = '';
return false;
}, false);
dropZone.addEventListener('drop', function(event) {
if (event.preventDefault) event.preventDefault();
var imgPassed = null;
var dropdata = document.querySelector('#drop-data');
var types = event.dataTransfer.types;
document.querySelector('#drop-data').textContent = '';
this.innerHTML = '';
for (var i = 0; i < types.length; i++) {
if (types[i] == 'Files') {
var files = event.dataTransfer.files;
for (var j = 0; j < files.length; j++) {
dropdata.textContent += 'File Name: '+files[j].fileName;
dropdata.textContent += 'File Size: '+files[j].fileSize;