HTML5 Gaming: animating sprites in Canvas with EaselJS

When you want to write casual games using the HTML5 Canvas element, you’ll need to find a way to handle your sprites. There are several libraries available to help you writing games such as ImpactJS, CraftyJS and so on. On my side, I’ve decided to use EaselJS which has been used to write PiratesLoveDaisies: an HTML5 Tower Defense game as well as for the very cool Atari Arcade suite. This awesome library works in all modern HTML5 browsers and could even help you building a Windows 8 HTML5 games. For instance, if you’re running the Windows 8, you can install the Pirates Love Daisies game from the Windows Store here: Pirates Love Daisies for Windows 8

In this first article, we’re going to see how to use your existing sprite elements and animate them.

This article is the first of a series of 3 that will guide you to build a complete platformer game from scratch:

- HTML5 Gaming: animating sprites in Canvas with EaselJS
- HTML5 Gaming: building the core objects & handling collisions with EaselJS
- HTML5 Platformer: the complete port of the XNA game to <canvas> with EaselJS

I’ve also written 3 others articles going further with the same game & assets:

- Tutorial: how to create HTML5 applications on Windows Phone thanks to PhoneGap where I’ll show you how to migrate the game to PhoneGap
- Modernizing your HTML5 Canvas games Part 1: hardware scaling & CSS3 where we’ll use CSS3 3D Transform, Transitions & Grid Layout
- Modernizing your HTML5 Canvas games Part 2: Offline API, Drag’n’drop & File API where we will enable playing to the game in offline mode

By reading all of them, you will know how to build a HTML5 game that will work under all modern browsers (IE9/10, Firefox, Chrome, Safari, Opera) and all modern mobile platforms (iPad/iPhone, Android/Firefox OS & Windows 8/Windows Phone 8)!

You can play to the final result (article 6/6) in your favorite browser here: Modern HTML5 Platformer

Ready to learn how to build the same kind of game from scratch? Let’s go then!

Introduction

On the official EaselJS site, you’ll find some interesting samples and some basic documentation. We will use the sprites sample as a base. We will use also the resources available in the XNA 4.0 Platformer sample. For those of you who are following my blog, you may remember that I love playing with this sample. The platformer sample have been updated in the meantime by our XNA team and is available here for Xbox 360, PC & Windows Phone 7: App Hub – platformer . You can download it to play with it and extract the sprites to use them with EaselJS.

In this article, we’re going to use these 2 PNG files as source of our sprite sequences:

Our monster running:

which contains 10 different sprites.

Our monster in idle mode:

which contains 11 different sprites.

Note: The following samples have been tested successfully in IE9/IE10/Chrome, Firefox, Opera 12 & Safari.  

Tutorial 1: building the SpriteSheet and the BitmapAnimation

We’ll start by moving the running monster between the beginning and the end of the width of our canvas.

First step is to load the complete sequence contained in the PNG file via this code:

 var imgMonsterARun = new Image();

function init() {
    //find canvas and load images, wait for last image to load
    canvas = document.getElementById("testCanvas");

    imgMonsterARun.onload = handleImageLoad;
    imgMonsterARun.onerror = handleImageError;
    imgMonsterARun.src = "img/MonsterARun.png";
}

This code will be called first to initialize our game’s content. Once loaded, we can start the game. EaselJS expose a SpriteSheet object to handle the sprite. Thus, by using this code:

 // create spritesheet and assign the associated data.
var spriteSheet = new createjs.SpriteSheet({
    // image to use
    images: [imgMonsterARun], 
    // width, height & registration point of each sprite
    frames: {width: 64, height: 64, regX: 32, regY: 32}, 
    animations: {    
        walk: [0, 9, "walk"]
    }
});

We’re indicating that we’d like to create a new sequence named “walk” that will be made of the imgMonsterARun image. This image will be split into 10 frames with a size of 64x64 pixels. This is the core object to load our sprites and create our sequences. There could be several sequences created from the same PNG file if you want to, like in the rats sprite sample of the EaselJS site.

After that, we need to use the BitmapAnimation object. It helps us animating our sequence and positioning our sprites on the screen. Let’s review the initializing code of this BitmapAnimation:

 // create a BitmapAnimation instance to display and play back the sprite sheet:
bmpAnimation = new createjs.BitmapAnimation(spriteSheet);

// start playing the first sequence:
bmpAnimation.gotoAndPlay("walk");     //animate
    
// set up a shadow. Note that shadows are ridiculously expensive. You could display hundreds
// of animated rats if you disabled the shadow.
bmpAnimation.shadow = new createjs.Shadow("#454", 0, 5, 4);

bmpAnimation.name = "monster1";
bmpAnimation.direction = 90;
bmpAnimation.vX = 4;
bmpAnimation.x = 16;
bmpAnimation.y = 32;
        
// have each monster start at a specific frame
bmpAnimation.currentFrame = 0;
stage.addChild(bmpAnimation);

The constructor of the BitmapAnimation object simply needs the SpriteSheet element as a parameter. We’re then giving a name to the sequence, setting some parameters like the speed and the initial position of our first frame. Finally, we add this sequence to the display list by using the Stage object and its addChild() method.

Next step is now to decide what we’d like to do in our animation loop. This animation loop is called every xxx milliseconds and let you update the position of your sprites. For that, EaselJS exposes a Ticker object which provides a centralized tick or heartbeat broadcast at a set interval. If you’re looking to the Ticker.js source code, you’ll see that since 0.4, the Ticker object of EaselJS supports requestAnimationFrame() :

 var f = window.requestAnimationFrame || window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame ||
                window.oRequestAnimationFrame || window.msRequestAnimationFrame;

Thanks to this code, IE10, Firefox, Chrome and future versions of Opera are supported already. But it’s not used by default by EaselJS. Probably for compatibility reasons I guess.

You can request to use it (for possible more efficient animations) via the boolean property useRAF set to true. Don’t worry, if your browser doesn’t support it, the code will automatically falls back to the setTimeout() method.

Ok, all you’ve got to do now is to subscribe to the tick event and implement a .tick() method that will be called back. This code is for instance registering the event on the global window object:

 createjs.Ticker.addListener(window);
createjs.Ticker.useRAF = true;
// Best Framerate targeted (60 FPS)
createjs.Ticker.setFPS(60);

And here is the code that will be called every 17ms (in an ideal world) to update the position of our monster:

 function tick() {
    // Hit testing the screen width, otherwise our sprite would disappear
    if (bmpAnimation.x >= screen_width - 16) {
        // We've reached the right side of our screen
        // We need to walk left now to go back to our initial position
        bmpAnimation.direction = -90;
    }

    if (bmpAnimation.x < 16) {
        // We've reached the left side of our screen
        // We need to walk right now
        bmpAnimation.direction = 90;
    }

    // Moving the sprite based on the direction & the speed
    if (bmpAnimation.direction == 90) {
        bmpAnimation.x += bmpAnimation.vX;
    }
    else {
        bmpAnimation.x -= bmpAnimation.vX;
    }

    // update the stage:
    stage.update();
}

You can test the final result here:

You can also browse this sample here: easelJSSpritesTutorial01 if you’d like to view the complete source code.

But wait! There are 2 problems with this animation:

1 – the animation steps are weird as the character seems to loop through its different sprites sequence too fast

2 – the character can only walk normally from right to left otherwise it looks like it tries to achieve a kind of Moonwalk dance.

Let’s see how to fix that in the second tutorial.

Tutorial 2: controlling the animation speed and flipping the sprites

To fix the animation’s speed, the simplest way to do it is to change the frequency parameter of the animations object of your SpriteSheet object like slightly described in the documentation: SpriteSheet . Here is the new code to build the SpriteSheet:

 var spriteSheetIdle = new createjs.SpriteSheet({
    images: [imgMonsterAIdle],
    frames: { width: 64, height: 64, regX: 32, regY: 32 }, 
    animations: {
        idle: [0, 10, "idle", 4]
    }
});

You’ll need also to slow down the velocity by changing the vX from 4 to 1 (logically divided by 4).

To add new animation frames to let the character walking normally from left to right, we need to flip each frame. EaselJS exposes a SpriteSheetUtils object for that and a addFlippedFrames() method you’ll find in the source. Here is my code that uses that:

 createjs.SpriteSheetUtils.addFlippedFrames(spriteSheet, true, false, false);

We’re creating a derivative sequence that will be named “walk_h”based on the “walk” sequence that we’re flipping horizontally. At last, here is the code that handles which sequence we should play based on the character position:

 function tick() {
    // Hit testing the screen width, otherwise our sprite would disappear
    if (bmpAnimation.x >= screen_width - 16) {
        // We've reached the right side of our screen
        // We need to walk left now to go back to our initial position
        bmpAnimation.direction = -90;
        bmpAnimation.gotoAndPlay("walk")
    }

    if (bmpAnimation.x < 16) {
        // We've reached the left side of our screen
        // We need to walk right now
        bmpAnimation.direction = 90;
        bmpAnimation.gotoAndPlay("walk_h");
    }

    // Moving the sprite based on the direction & the speed
    if (bmpAnimation.direction == 90) {
        bmpAnimation.x += bmpAnimation.vX;
    }
    else {
        bmpAnimation.x -= bmpAnimation.vX;
    }

    // update the stage:
    stage.update();
}

You can test the final result here:

You can also browse this sample here: easelJSSpritesTutorial02 if you’d like to view the complete source code.

Tutorial 3: loading multiple sprites and playing with multiple animations

It’s time now to load the idle state of the monster. The idea here is to play the walking animation once to achieve a single round-trip. Once achieved, we will play the idle state.

We will then now load multiple PNG files from the web server. It’s then very important to wait until all resources are loaded otherwise you may try to draw non-yet downloaded resources. Here is a very simple way to do it:

 var numberOfImagesLoaded = 0;

var imgMonsterARun = new Image();
var imgMonsterAIdle = new Image();

function init() {
    //find canvas and load images, wait for last image to load
    canvas = document.getElementById("testCanvas");

    imgMonsterARun.onload = handleImageLoad;
    imgMonsterARun.onerror = handleImageError;
    imgMonsterARun.src = "img/MonsterARun.png";

    imgMonsterAIdle.onload = handleImageLoad;
    imgMonsterAIdle.onerror = handleImageError;
    imgMonsterAIdle.src = "img/MonsterAIdle.png";
}

function handleImageLoad(e) {
    numberOfImagesLoaded++;

    // We're not starting the game until all images are loaded
    // Otherwise, you may start to draw without the resource and raise 
    // this DOM Exception: INVALID_STATE_ERR (11) on the drawImage method
    if (numberOfImagesLoaded == 2) {
        numberOfImagesLoaded = 0;
        startGame();
    }
}

This code is very simple. For instance, it doesn’t handle the errors properly by trying to re-download the image in case of a first failure. If you’re building a game, you will need to write your own content download manager if the JS library you’re using doesn’t implement it.

To add the idle sequence and setting the position parameters, we just need to use the same kind of code previously seen:

 // Idle sequence of the monster
var spriteSheetIdle = new createjs.SpriteSheet({
    images: [imgMonsterAIdle],
    frames: { width: 64, height: 64, regX: 32, regY: 32 }, 
    animations: {
        idle: [0, 10, "idle", 4]
    }
});

bmpAnimationIdle = new createjs.BitmapAnimation(spriteSheetIdle);

bmpAnimationIdle.name = "monsteridle1";
bmpAnimationIdle.x = 16;
bmpAnimationIdle.y = 32;

Now, in the tick() method, we need to stop the walking animation once we’ve reached back the left side of the screen and to play the idle animation instead. Here is the code which does that:

 if (bmpAnimation.x < 16) {
    // We've reached the left side of our screen
    // We need to walk right now
    bmpAnimation.direction = 90;
    bmpAnimation.gotoAndStop("walk");
    stage.removeChild(bmpAnimation);
    bmpAnimationIdle.gotoAndPlay("idle");
    stage.addChild(bmpAnimationIdle);
}

You can test the final result here:

You can also browse this sample here: easelJSSpritesTutorial03 if you’d like to view the complete source code.

That’s all folks! But if you want to go further, you can read the next part here: HTML5 Gaming: building the core objects & handling collisions with EaselJS which is the second step you need to understand before writing a complete platform game detailed in the third article.

Follow the author @davrous

Note : this tutorial has originally been written for EaselJS 0.3.2 in July 2010 and has been updated for EaselJS 0.6 on 04/03/2013. For those of you who read the version 0.3.2, here are the main changes for this tutorial to be aware of:

1. BitmapSequence is not available anymore since 0.4 and has been replaced by BitmapAnimation
2. You can now slow down the animation loop of the sprites natively while building the SpriteSheet object
3. EaselJS 0.4 is now using requestAnimationFrame for more efficient animations on supported browsers (like IE10+, Firefox 4.0+ & Chrome via the appropriate vendors’ prefixes).
4. Since EaselJS 0.4.2 and in 0.5, you need to add the createjs namespace before every EaselJS objects by default. Otherwise, simply affect the createjs namespace to the window object.

Comments

• Anonymous
  July 21, 2011
  cool!

• Anonymous
  July 22, 2011
  Wow!, tiene potencial...

• Anonymous
  July 25, 2011
  great stuff! what do i need for that source to work on my web page? those two pictures, easel.js file, and what else? cause somehow it wont work in my example.

• Anonymous
  July 25, 2011
  Hi NRS, You just need indeed the easel.js file, the 2 PNG file and re-use the code in this page for instance: david.blob.core.windows.net/.../easelJSSpritesTutorial03.html (View Source). What is the error you've got? Bye, David David

• Anonymous
  July 26, 2011
  I solved my problem. Thanks. Bye

• Anonymous
  August 04, 2011
  What is the function of "| 0" in the following statement:   ... bmpSeq.spriteSheet.frameHeight / 2 | 0 ?? What about "| .5" in a later statement? I've searched the web for an answer but can't find it.  I know the "|" is a bitwise OR, but I don't understand how it's used here. Thanks

• Anonymous
  November 05, 2011
  @Greg: | 0 is a trick to do Math.floor with less characters. | 0.5 does the same, I believe it's a typo www.tapper-ware.net/blog

• Anonymous
  November 14, 2011
  The comment has been removed

• Anonymous
  February 07, 2012
  Thanks for posting this!  It appears that a recent api change (from BitmapSequence to BitmapAnimation) has broken the code for animating the monster (i.e. the section above where you get it walking left ).   How should this look now in version 4?

• Anonymous
  February 10, 2012
  i'm not able to use flip method in this code. any one can give suggestion.

• Anonymous
  March 05, 2012
  The comment has been removed

• Anonymous
  March 05, 2012
  Hi John, EaselJS can simply be downloaded here: http://easeljs.com/ Bye, David

• Anonymous
  March 08, 2012
  The comment has been removed

• Anonymous
  March 15, 2012
  Hi Maddy, I'm going to refactor the 3 tutorials using EaselJS 0.4. You're right, BitmapSequence has gone for BitmapAnimation. The animation loop has changed also to use, when available, requestanimationframe. Stay tuned for the updates. Regards, David

• Anonymous
  March 16, 2012
  Hi all, I've updated this first tutorial to match EaselJS 0.4 changes (BitmapAnimation instead of BitmapSequence and so on). Enjoy! David

• Anonymous
  March 27, 2012
  David, Great post. Any tips on how to allow the player to move vertically as well? I no longer allow the player to "fall" and I got the right direction set, but struggling with what to do an ApplyPhysics to move the player up/down. thanks. voss.

• Anonymous
  March 27, 2012
  Hi voss, You'll find exactly how to do that in the 3rd tutorial implementing an ApplyPhysics method: blogs.msdn.com/.../html5-platformer-the-complete-port-of-the-xna-game-to-lt-canvas-gt-with-easeljs.aspx . Simply read the code! ;-) Bye, David

• Anonymous
  April 23, 2012
  i tried typing the code step by step that you wrote in the first example and also tried just copying and pasting the code from the examples source code but it doesn't seem to work and i get these weird lines that get randomly added to my code: {rtf1ansiansicpg1252deff0deflang1033{fonttbl{f0fswissfcharset0 Arial;}} {*generator Msftedit 5.41.15.1507;}viewkind4uc1pardf0fs20 par par par par par par par par par par par par par par par par par par par par par par par par par par par par par tabpar par tab par par tab par tab and i have downloaded EaselJS 0.4 and platformer can you explain what i'm doing wrong?

• Anonymous
  May 22, 2012
  The comment has been removed

• Anonymous
  May 24, 2012
  Hi all,       SpriteSheet have property frames ,the frame property width and height I know ,but I don't know regX and regY means, the frames width is 64 how to Calculation regX  value? help me Thanks

• Anonymous
  May 29, 2012
  awesome (O.O)

• Anonymous
  July 06, 2012
  Brilliant article! Thanks a lot, I really learned a lot. Gonna work on your tutorial 2 next. However, newcomers like myself who are using EaselJS 0.4.2 might want to note that some of the code in the article won't work with the new version of EaselJS - the following changes are needed:

1. CHANGE stage=new Stage(canvas); TO stage=new createjs.Stage(canvas);
2. CHANGE var spritesheet=new SpriteSheet({ ...}); TO var spritesheet=new createjs.SpriteSheet({...});
3. CHANGE SpriteSheetUtils.addFlippedFrames(spritesheet,true,false,false); TO createjs.SpriteSheetUtils.addFlippedFrames(spritesheet,true,false,false);
4. CHANGE bmpAnimation=new BitmapAnimation(spritesheet); TO bmpAnimation=new createjs.BitmapAnimation(spritesheet); I spent some time trying to figure out why the code won't work, so I hope newcomers will benefit from this above tip. Cheers.

• Anonymous
  July 06, 2012
  Thanks for the feedback on 0.4.2! I'll try to update the articles and the code asap. David

• Anonymous
  July 11, 2012
  Hello, I've just checked with EaselJS 0.4.2 and my samples are still working as-is. Are you sure about your problem? David

• Anonymous
  July 11, 2012
  "yetanotherwebdesigner", you solved my problem ! Nice tutorial by the way ! Thanks a lot !

• Anonymous
  July 16, 2012
  Hi David, Great tutorial. even with my very basic javascript knowledge I can still understand what the code does. I do however have some problems getting it to work. I've eventually just copied the code from david.blob.core.windows.net/.../easelJSSpritesTutorial03.html , changed the paths to my own. But I'm having trouble finding where you declare the easeljs-0.4.2.min.js file. All I can find are the includes from the src map. What exactly am I missing here? I'm probably just creating the file in the wrong hierarchy, is there a chance you could upload the entire scene, as a zip or something? Kind regards.

• Anonymous
  July 25, 2012
  Thanks for the helpful tutorial! BTW, the first code sample in "Tutorial 2" shows the animation sequence for "idle", even though the accompanying text says it's showing how to modify the "walk" animation code.

• Anonymous
  August 30, 2012
  Hi all, I've just updated the code & tutorials for EaselJS 0.5 to add the use of the createjs namespace. EaselJS 0.5 should fix also the possible iPad & Opera issues. Bye, David

• Anonymous
  September 01, 2012
  It looks cool. Thx

• Anonymous
  November 02, 2012
  Hey guys, i'm click "start" button (after click "Reset" button) and it's not run... i see a error "Uncaught Error: SECURITY_ERR: DOM Exception 18 easeljs-0.5.0.min.js:104"... (i use chrome browser version 22..) p/s: good on firefox ...

• Anonymous
  December 04, 2012
  Hi David: Thank you for taking the time to ceate these tutorials. I've not seen many online that are as well documented, and as clear in their instruction (and encouragement).  Your work is greatly appreciated.  Thanks.

• Anonymous
  January 04, 2013
  it slooowly on android browse and have bugs!

• Anonymous
  January 06, 2013
  If anyone is getting 'SECURITY_ERR: DOM Exception 18 ...' for Chrome, I found this is caused by not serving the content with a proper web server, and instead just using the file:/// syntax in your browser. At least for me :-).

• Anonymous
  January 14, 2013
  I also have a problem in chrome.v 24. After clicking reset button the animation doesn't  start. May be the addFlippedFrames() method causes the problem in chrome?

• Anonymous
  January 14, 2013
  It also seems to me that the animation in IE10 is faster than in Firefox.

• Anonymous
  January 17, 2013
  super

• Anonymous
  January 28, 2013
  Hi, i can run the first tutorial, but got problems by second and third....When i push start nothing happens :( here at the site it works fine..

• Anonymous
  January 28, 2013
  Thanks for your nice feedbacks Douglas & Ramy. @Kenny: are you running the article/demos on an iPad? If so, it seems the last update (iOS 6) got a bug with multiple iFrame embedding canvas elements. I don't know why, but you can draw only on one canvas at a time. All other platforms work well.

• Anonymous
  February 06, 2013
  Great tutorial! Really nice, well documented and it has nice examples. This is what I was looking for to start a HTML5 game, good work!

• Anonymous
  February 11, 2013
  100% cpu one animation?   canvas rendering 450x , 350y. lol opera and chrome...

• Anonymous
  February 24, 2013
  i downloaded the library but i dont know how to install it lol any help?

• Anonymous
  April 04, 2013
  Exceptional article for a newbie like me. Everything is explained clearly and source code works fine and good for experimenting. Thanks a lot!

• Anonymous
  July 23, 2013
  :)

• Anonymous
  July 29, 2013
  Useful informations

• Anonymous
  September 07, 2013
  Hi, While using this tutorial with Phonegap I encountered the following issues. Hopefully these tips save someone a few hours :

1. Phonegap recommends using document.addEventListener("deviceready", function () { . . . } ); for all javascript code or "bad things will happen" (their words). However if you do this the game loop (tick function) is no longer attached to window and fails to fire. I had to manually bind createjs.Ticker.addListener(tick) to get it to work. More details at this link : community.createjs.com/.../155-problem-with-ticker
2. On Phonegap on Android 4.1.2 (Galaxy Note II) using EaselJS build 0.6.1 in the init function of this tutorial, you should use imgMonsterARun = new Image(); . I don't know the exact reason, but when you hit start then hit reset then hit start again with certain browsers, adding event handlers with a refinement (imgMonsterARun.onload, imgMonsterARun.onerror) fails the second time. Either create a new Image or check for existence of the handlers. This is only an issue on Android browser apparently.
3. Another obvious one that cost me many hours; Eclipse ADT does not redeploy the application if it thinks there's no code changes. Problem is javascript counts as no code change. So clean the project before doing Run As Android Application and it should push the javascript changes to the device. I always clean before running now. Thanks for the great tutorials. ~ Brian

• Anonymous
  September 07, 2013
  Thanks for your great feedbacks Brian! I'm sure they will be useful for some of us.

• Anonymous
  September 24, 2013
  I love how handleImageLoad and handleImageError are not defined in this tutorial.  Wonderful stuff.

• Anonymous
  September 24, 2013
  This is because you haven't read the tutorial correctly. If you'd like to review the complete code, open the samples in another window and right-click -> "view source". You'll see that those handlers are of course well defined otherwise the code couldn't work at all. I haven't put the code directly in the tutorial as it's too obvious how to write them.

• Anonymous
  October 07, 2013
  Hi, Great tutorial.! However, I am wondering how would you do if the player can choose different character with specifics animations. In other words, how would you load spritesheets from either en external file or a database ? Seems like JSON is the solution, but so far I can't get how.

• Anonymous
  October 27, 2013
  Hi! I have a problems with adding mouse listeners for animated sprites. I want to drag sprites, but I can't. I have a code, but it works for shapes, not for sprites.

• Anonymous
  November 20, 2013
  The comment has been removed

• Anonymous
  December 30, 2013
  Hi, I had a problem with this tutorial and the latest version of the library (7.x) We seams to use "addEventListener" instead of "addListener" (ref : community.createjs.com/.../1881-problems-with-tick) Regards, wytes

• Anonymous
  January 25, 2014
  There have been more changes that break this tutorial: --BitmapAnimation is deprecated in favor of "Sprite" --Ticker no longer has "addListener" function, it uses "addEventListener" ---e.g. createjs.Ticker.addEventListener("tick", handleTick); More info: www.createjs.com/.../Sprite.html www.createjs.com/.../Ticker.html Thanks, Charlene Disclaimer: Current MS employee

• Anonymous
  February 19, 2014
  Hi David, It is a very great tool. I'm learning abut it. Thanks for sharing.

• Anonymous
  March 19, 2014
  Hi , I use php editor jetstorm brain. How do I insert createjs or easejs or soundjs plugin in to my editor, so the editor can provide autocomplete from createjs or easejs library. What should I do? Thanks

• Anonymous
  October 07, 2014
  Hi David, Due to a request on the forum, I have updated your tutorial to the latest. This link includes a good summary, some code snippets, and a link to download the updates! Cheers. community.createjs.com/.../11564-code-for-071-required

• Anonymous
  October 07, 2014
  Thanks Lanny! :)

• Anonymous
  October 14, 2014
  Looks like great tutorial. But i'm unable to follow the guide. because I'm new to html5 and easyjs. how to setup the environment ? how to setup easyjs ??

• Anonymous
  May 07, 2015
  The comment has been removed

• Anonymous
  June 30, 2015
  Thank you so much Didac PF. Thanks to you I won't be bald from pulling out my hair!