JavaScript APIs - The Web is the Platform - .toster conference, Moscow

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  • 1. JavaScript APIs - The Web is the Platform
  • 2. @robertnyman
  • 3. Mozilla is aglobal non-profit dedicatedto putting youin control ofyour onlineexperience andshaping thefuture of theWeb for thepublic good
  • 4. File API
  • 5. <!-- The multiple attribute allows for uploading of multiple files--><input id="files-upload" type="file" multiple>
  • 6. 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 };};
  • 7. 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); }}
  • 8. // For Firefox, Google Chrome and Safarivar 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 Safarixhr.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);
  • 9. Video
  • 10. must die!!! rea lly Not
  • 11. Fullscreen
  • 12. <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>
  • 13. mozRequestFullScreenWithKeys?
  • 14. html:-moz-full-screen { background: red;}html:-webkit-full-screen { background: red;}
  • 15. Camera
  • 16. <input type="file" id="take-picture" accept="image/*">
  • 17. takePicture.onchange = function (event) { // Get a reference to the taken picture or chosen file var files = event.target.files, file; if (files && files.length > 0) { file = files[0]; // Get window.URL object var URL = window.URL || window.webkitURL; // Create ObjectURL var imgURL = URL.createObjectURL(file); // Set img src to ObjectURL showPicture.src = imgURL; // Revoke ObjectURL URL.revokeObjectURL(imgURL); }};
  • 18. WebRTC
  • 19. var liveVideo = document.querySelector("#live-video");navigator.getUserMedia( {video: true}, function (stream) { liveVideo.src = stream; }, function (error) { console.log("An error occurred: " + error); });
  • 20. Pointer Lock API
  • 21. var docElm = document.documentElement;// Requesting Pointer LockdocElm.requestPointerLock = elem.requestPointerLock || elem.mozRequestPointerLock || elem.webkitRequestPointerLock;docElm.requestPointerLock();
  • 22. document.addEventListener("mousemove", function(e) { var movementX = e.movementX || e.mozMovementX || e.webkitMovementX || 0, movementY = e.movementY || e.mozMovementY || e.webkitMovementY || 0; // Print the mouse movement delta values console.log("movementX=" + movementX, "movementY="+ movementY);}, false);
  • 23. Web Storage
  • 24. sessionStorage.setItem("Wrestles", "Bears");console.log(sessionStorage.getItem("Wrestles"));
  • 25. localStorage.setItem("Occupation", "Politician");
  • 26. var vladimirPutin = { "sings" : "yes", "song" : "Blueberry Hill"};localStorage.setItem("vladimirPutin", JSON.stringify(vladimirPutin));console.log(typeof JSON.parse(localStorage.getItem("vladimirPutin")));
  • 27. IndexedDB
  • 28. // IndexedDBvar indexedDB = window.indexedDB || window.webkitIndexedDB ||window.mozIndexedDB || window.OIndexedDB || window.msIndexedDB, IDBTransaction = window.IDBTransaction ||window.webkitIDBTransaction || window.OIDBTransaction ||window.msIDBTransaction, dbVersion = 1;// Create/open databasevar request = indexedDB.open("elephantFiles", dbVersion);
  • 29. createObjectStore = function (dataBase) { // Create an objectStore dataBase.createObjectStore("elephants");}// Currently only in latest Firefox versionsrequest.onupgradeneeded = function (event) { createObjectStore(event.target.result);};
  • 30. request.onsuccess = function (event) { // Create XHR var xhr = new XMLHttpRequest(), blob; xhr.open("GET", "elephant.png", true); // Set the responseType to blob xhr.responseType = "blob"; xhr.addEventListener("load", function () { if (xhr.status === 200) { // Blob as response blob = xhr.response; // Put the received blob into IndexedDB putElephantInDb(blob); } }, false); // Send XHR xhr.send();}
  • 31. putElephantInDb = function (blob) { // Open a transaction to the database var transaction = db.transaction(["elephants"], IDBTransaction.READ_WRITE); // Put the blob into the dabase var put = transaction.objectStore("elephants").put(blob, "image"); // Retrieve the file that was just stored transaction.objectStore("elephants").get("image").onsuccess = function (event) { var imgFile = event.target.result; // Get window.URL object var URL = window.URL || window.webkitURL; // Create and revoke ObjectURL var imgURL = URL.createObjectURL(imgFile); // Set img src to ObjectURL var imgElephant = document.getElementById("elephant"); imgElephant.setAttribute("src", imgURL); // Revoking ObjectURL URL.revokeObjectURL(imgURL); };};
  • 32. Battery
  • 33. // Get battery level in percentagevar batteryLevel = battery.level * 100 + "%";// Get whether device is charging or notvar chargingStatus = battery.charging;// Time until the device is fully chargedvar batteryCharged = battery.chargingTime;// Time until the device is dischargedvar batteryDischarged = battery.dischargingTime;
  • 34. battery.addEventLister("levelchange", function () { // Devices battery level changed}, false);battery.addEventListener("chargingchange", function () { // Device got plugged in to power, or unplugged}, false);battery.addEventListener("chargingtimechange", function () { // Devices charging time changed}, false);battery.addEventListener("dischargingtimechange", function () { // Devices discharging time changed}, false);
  • 35. Boot to Gecko
  • 36. https://github.com/andreasgal/B2Ghttps://github.com/andreasgal/gaia
  • 37. Telephony & SMS
  • 38. // Telephony objectvar tel = navigator.mozTelephony;// Check if the phone is muted (read/write property)console.log(tel.muted);// Check if the speaker is enabled (read/write property)console.log(tel.speakerEnabled);// Place a callvar call = tel.dial("123456789");
  • 39. // Receiving a calltel.onincoming = function (event) { var incomingCall = event.call; // Get the number of the incoming call console.log(incomingCall.number); // Answer the call incomingCall.answer();};// Disconnect a callcall.hangUp();
  • 40. // SMS objectvar sms = navigator.mozSMS;// Send a messagesms.send("123456789", "Hello world!");// Recieve a messagesms.onrecieved = function (event) { // Read message console.log(event.message);};
  • 41. Vibration
  • 42. (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);})();
  • 43. WebAPI
  • 44. Try new things
  • 45. HTML5 -The beauty of the Open Web
  • 46. "So we saved the worldtogether for a while,and that was lovely." - Lost
  • 47. Robert Nymanrobertnyman.com/speaking/ robnyman@mozilla.comrobertnyman.com/html5/ Twitter: @robertnymanrobertnyman.com/css3/