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HTML5 workshop, part 2
- 1. HTML5 APIs - Where No Man Has Gone Before!
- 3. classList
- 4. var elm = document.getElementById("classlist-demo"); elm.classList.add("boxy"); elm.classList.add("pretty"); elm.classList.remove("pretty"); elm.classList.toggle("pretty"); elm.classList.contains("pretty"); elm.classList.toString();
- 6. <p data-type="police" data-value="I am da law!"> An element with custom data attributes </p>
- 7. var customAttributes = document.getElementById("custom-attributes"); customAttributes.getAttribute("data-type"); customAttributes.getAttribute("data-value");
- 9. var dataset = []; for (var i in customAttributes.dataset) { dataset.push(i + ": " + customAttributes.dataset[i]); }
- 10. Video
- 14. // Properties video.paused; video.muted; video.autobuffer; video.autoplay; video.buffered; (Unimplemented) video.bufferedBytes; (Unimplemented) video.bufferingRate; (Unimplemented) video.bufferingThrottled; (Unimplemented) video.controls; video.currentSrc; video.currentTime; video.defaultPlaybackRate; video.duration; video.ended; video.error; video.muted; video.networkState; video.paused; video.playbackRate; video.readyState; video.seeking; video.src; video.totalBytes; video.volume;
- 15. // Events video.abort; video.canplay; video.canplaythrough; video.canshowcurrentframe; video.dataunavailable; video.durationchange; video.emptied; video.empty; video.ended; video.error; video.loadedfirstframe; video.loadedmetadata; video.loadstart; video.pause; video.play; video.progress; (lengthComputable, loaded, total) video.ratechange; video.seeked; video.seeking; video.suspend; video.timeupdate; video.volumechange;
- 16. Canvas
- 17. <canvas id="my-canvas" width="500" height="500"> I am canvas </canvas>
- 18. var canvas = document.getElementById("my-canvas"), context = canvas.getContext("2d"); context.fillStyle = "#f00"; context.fillRect(0, 0, 100, 100);
- 19. context.save(); context.fillStyle = "rgba(0, 0, 200, 0.5)"; context.fillRect(50, 50, 100, 100); context.clearRect(40, 40, 20, 20); context.restore();
- 21. context.fillRect(350, 50, 100, 100); context.lineWidth = "10"; context.lineJoin = "round"; context.moveTo(50, 50); context.lineTo(200, 200); context.lineTo(100, 300); context.closePath(); context.stroke(); context.fill(); context.beginPath(); context.strokeStyle = "#00f"; context.arc(200, 400, 75, 0, Math.PI*2, false); context.stroke();
- 24. context.fillStyle = "#fff"; context.fillRect(0, 0, 200, 200); context.fillStyle = "#f00"; context.fillRect(0, 0, 100, 100); context.fillRect(100, 100, 100, 100);
- 26. context.strokeStyle = "transparent"; context.arc(100, 100, 75, 0, Math.PI*2, false); context.clip(); context.stroke(); context.fillStyle = "#fff"; context.fillRect(0, 0, 200, 200); context.fillStyle = "#f00"; context.fillRect(0, 0, 100, 100); context.fillRect(100, 100, 100, 100);
- 28. var canvas = document.getElementById("my-canvas"), context = canvas.getContext("2d"), img = document.createElement("img"); img.addEventListener("load", function () { context.drawImage(img, 0, 0, 600, 200); // Get canvas content as a base64 image var base64Img = canvas.toDataURL("image/png"); }, false); img.setAttribute("src", "view.jpg");
- 31. pdf.js
- 32. Web Storage
- 36. var anthonyWeiner = { "Interest" : "Photography", "Social" : "Twitter" }; localStorage.setItem("anthonyWeiner", JSON.stringify(anthonyWeiner)); console.log(typeof JSON.parse(localStorage.getItem("anthonyWeiner")));
- 37. Web SQL IndexedDB
- 38. IndexedDB
- 39. var indexedDB = window.indexedDB || window.webkitIndexedDB || window.mozIndexedDB || window.msIndexedDB; var request = indexedDB.open("ABBADatabase");
- 40. var request = indexedDB.open("ABBADatabase", 2), customerData = [ {ssn: "444-44-4444", name: "Bill", age: 35, email: "bill@company.com"}, {ssn: "555-55-5555", name: "Donna", age: 32, email: "donna@home.org"} ]; request.onerror = function(event) { // Handle errors. }; request.onupgradeneeded = function (event) { var objectStore = db.createObjectStore("customers", { keyPath: "ssn"} ); objectStore.createIndex("name", "name", { unique: false }); objectStore.createIndex("email", "email", { unique: true } ); for (var i in customerData) { objectStore.add(customerData[i]); } };
- 42. if (window.addEventListener) { /* Works well in Firefox and Opera with the Work Offline option in the File menu. Pulling the ethernet cable doesn't seem to trigger it */ window.addEventListener("online", isOnline, false); window.addEventListener("offline", isOffline, false); } else { /* Works in IE with the Work Offline option in the File menu and pulling the ethernet cable */ document.body.ononline = isOnline; document.body.onoffline = isOffline; }
- 43. // Poll the navigator.onLine property setInterval(function () { console.log(navigator.onLine); }, 1000);
- 46. CACHE MANIFEST # VERSION 10 CACHE: offline.html base.css FALLBACK: online.css offline.css NETWORK: /live-updates
- 47. Geolocation
- 48. if (navigator.geolocation) { navigator.geolocation.getCurrentPosition(function (position) { alert(position.coords.latitude + ", " + position.coords.longitude); }); }
- 52. History API
- 54. var url = "http://robertnyman.com", title = "My blog", state = { address : url }; window.history.pushState(state, title, url);
- 56. Web Sockets
- 57. LiveConnect Forever Frame HTTP Long-Polling and XHR Streaming What came before WebSockets? AJAX HTTP Polling Cross Frame Communication
- 58. var ws = new WebSocket("ws://robertnyman.com/wsmagic"); // Send data ws.send("Some data"); // Close the connection ws.close();
- 59. var ws = new WebSocket("ws://robertnyman.com/wsmagic"); // When connection is opened ws.onopen = function () { console.log("Connection opened!"); }; // When you receive a message ws.onmessage = function (evt) { console.log(evt.data); }; // When you close the connection ws.onclose = function () { console.log("Connection closed"); }; // When an error occurred ws.onerror = function () { console.log("An error occurred"); };
- 61. File API
- 62. <!-- The multiple attribute allows for uploading of multiple files --> <input id="files-upload" type="file" multiple>
- 63. var filesUpload = document.getElementById("files-upload"); filesUpload.onchange = function () { // Access to data about all files var files = this.files, file; for (var i=0, l=files.length; i<l; i++) { file = file[i]; file.name; // Get the name of the file file.size; // Get the size of the file, in bytes file.type; // Get the type of the file }; };
- 64. for (var i=0, l=files.length, file, img; i<l; i++) { file = files[i]; if (typeof FileReader !== "undefined") { img = document.createElement("img"); reader = new FileReader(); reader.onload = (function (theImg) { return function (evt) { theImg.src = evt.target.result; }; }(img)); reader.readAsDataURL(file); } }
- 65. // For Firefox, Google Chrome and Safari var xhr = new XMLHttpRequest(); xhr.open("post", "upload/upload.php", true); xhr.onreadystatechange = function() { if (this.readyState === 4) { // File uploaded } }; // Upload file: Firefox, Google Chrome and Safari xhr.setRequestHeader("Content-Type", "multipart/form-data"); xhr.setRequestHeader("X-File-Name", file.fileName); xhr.setRequestHeader("X-File-Size", file.fileSize); xhr.setRequestHeader("X-File-Type", file.type); xhr.send(file);
- 66. Drag and Drop
- 67. ...I am forced to conclude that the HTML5 drag and drop module is not just a disaster, it’s a fucking disaster. -Peter-Paul Koch
- 69. <p id="drop-area"> Drag and drop files here </p>
- 70. var someImg = document.getElementById("some-image"), dropArea = document.getElementById("drop-area"); someImg.ondragstart = function (evt) { var event = evt || window.event; event.dataTransfer.setData("Text", this.getAttribute("alt")); return false; }; dropArea.ondragenter = function (evt) { return false; “If the drop is to be }; accepted, then this dropArea.ondragover = function (evt) { return false; event (dragover) has }; to be canceled.” dropArea.ondrop = function (evt) { var text = event.dataTransfer.getData("Text"); event.cancelBubble = true; // For IE return false; };
- 71. someImg.ondragstart = function (evt) { var event = evt || window.event; event.dataTransfer.setDragImage(dragIcon, -10, -10); return false; };
- 72. Web Workers
- 73. var worker = new Worker("worker.js");
- 74. // Main page code var worker = new Worker("worker.js"); // postMessage worker.postMessage(5); // Receive message back from Worker worker.onmessage = function (evt) { document.getElementById("worker-results").innerHTML = evt.data; }; // Error handling worker.onerror = function (evt) { document.getElementById("worker-results").innerHTML = "An error occurred"; };
- 75. // Web Worker code onmessage = function (evt) { for (var i=evt.data, il=1000001; i<il; i++) { postMessage(i); }; };
- 76. Fullscreen
- 77. <button id="view-fullscreen">Fullscreen</button> <script type="text/javascript"> (function () { var viewFullScreen = document.getElementById("view-fullscreen"); if (viewFullScreen) { viewFullScreen.addEventListener("click", function () { var docElm = document.documentElement; if (docElm.mozRequestFullScreen) { docElm.mozRequestFullScreen(); } else if (docElm.webkitRequestFullScreen) { docElm.webkitRequestFullScreen(); } }, false); } })(); </script>
- 79. html:-moz-full-screen { background: red; } html:-webkit-full-screen { background: red; }
- 82. Battery
- 83. // Get battery level in percentage var batteryLevel = battery.level * 100 + "%"; // Get whether device is charging or not var chargingStatus = battery.charging; // Time until the device is fully charged var batteryCharged = battery.chargingTime; // Time until the device is discharged var batteryDischarged = battery.dischargingTime;
- 84. battery.addEventLister("levelchange", function () { // Device's battery level changed }, false); battery.addEventListener("chargingchange", function () { // Device got plugged in to power, or unplugged }, false); battery.addEventListener("chargingtimechange", function () { // Device's charging time changed }, false); battery.addEventListener("dischargingtimechange", function () { // Device's discharging time changed }, false);
- 85. Vibration
- 86. (function () { document.querySelector("#vibrate-one-second").addEventListener("click", function () { navigator.mozVibrate(1000); }, false); document.querySelector("#vibrate-twice").addEventListener("click", function () { navigator.mozVibrate([200, 100, 200, 100]); }, false); document.querySelector("#vibrate-long-time").addEventListener("click", function () { navigator.mozVibrate(5000); }, false); document.querySelector("#vibrate-off").addEventListener("click", function () { navigator.mozVibrate(0); }, false); })();
- 87. WebGL
- 92. squareVertexPositionBuffer = gl.createBuffer(); gl.bindBuffer(gl.ARRAY_BUFFER, squareVertexPositionBuffer); vertices = [ 1.0, 1.0, 0.0, -1.0, 1.0, 0.0, 1.0, -1.0, 0.0, -1.0, -1.0, 0.0 ]; gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(vertices), gl.STATIC_DRAW); squareVertexPositionBuffer.itemSize = 3; squareVertexPositionBuffer.numItems = 4; }
- 93. var teapotPositions = new Float32Array([ 17.83489990234375, 0, 30.573999404907227, 16.452699661254883, -7.000179767608643, 30.573999404907227, 16.223100662231445, -6.902520179748535, 31.51460075378418, 17.586000442504883, 0, 31.51460075378418, 16.48940086364746, -7.015810012817383, 31.828100204467773, 17.87470054626465, 0, 31.828100204467773, 17.031099319458008, -7.246280193328857, 31.51460075378418, 18.46190071105957, 0, 31.51460075378418, 17.62779998779297, -7.500199794769287, 30.573999404907227, 19.108800888061523, 0, 30.573999404907227, 12.662699699401855, -12.662699699401855, 30.573999404907227, 12.486100196838379, -12.486100196838379, 31.51460075378418, 12.690999984741211, -12.690999984741211, 31.828100204467773, 13.10789966583252, -13.10789966583252, 31.51460075378418, 13.56719970703125, -13.56719970703125, 30.573999404907227, 7.000179767608643, -16.452699661254883, 30.573999404907227, 6.902520179748535, -16.223100662231445, 31.51460075378418, 7.015810012817383, -16.48940086364746, 31.828100204467773, 7.246280193328857, -17.031099319458008, 31.51460075378418, 7.500199794769287, -17.62779998779297, 30.573999404907227, 0, -17.83489990234375, 30.573999404907227, 0, -17.586000442504883, 31.51460075378418, 0, -17.87470054626465, 31.828100204467773, 0, -18.46190071105957, 31.51460075378418, 0, -19.108800888061523, 30.573999404907227, 0, -17.83489990234375, 30.573999404907227, -7.483870029449463, -16.452699661254883, 30.573999404907227, -7.106579780578613, -16.223100662231445, 31.51460075378418, 0, -17.586000442504883, 31.51460075378418, -7.07627010345459, -16.48940086364746, 31.828100204467773, 0, -17.87470054626465, 31.828100204467773, -7.25383996963501, -17.031099319458008, 31.51460075378418, 0, -18.46190071105957, 31.51460075378418, -7.500199794769287, -17.62779998779297, 30.573999404907227, 0, -19.108800888061523, 30.573999404907227, -13.092700004577637, -12.662699699401855, 30.573999404907227, -12.667499542236328, -12.486100196838379, 31.51460075378418, -12.744799613952637, -12.690999984741211, 31.828100204467773, -13.11460018157959, -13.10789966583252, 31.51460075378418, -13.56719970703125, -13.56719970703125, 30.573999404907227, -16.61389923095703, -7.000179767608643, 30.573999404907227, -16.291099548339844, -6.902520179748535, 31.51460075378418, -16.50950050354004, -7.015810012817383, 31.828100204467773, -17.033599853515625, -7.246280193328857, 31.51460075378418, -17.62779998779297, -7.500199794769287, 30.573999404907227, -17.83489990234375, 0, 30.573999404907227, -17.586000442504883, 0, 31.51460075378418, -17.87470054626465, 0, 31.828100204467773, -18.46190071105957, 0, 31.51460075378418, -19.108800888061523, 0, 30.573999404907227, -17.83489990234375, 0, 30.573999404907227, -16.452699661254883, 7.000179767608643,
- 96. Try new things
- 100. Robert Nyman robertnyman.com/speaking/ robnyman@mozilla.com robertnyman.com/html5/ Twitter: @robertnyman robertnyman.com/css3/