<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width">
<title>JS Bin</title>
<script>
// var globales, toujours mettre var
var rectInstancie;
var canvas, ctx;
var w, h;
function init() {
console.log("init");
canvas = document.querySelector("#myCanvas");
ctx = canvas.getContext('2d');
w = canvas.width;
h = canvas.height;
ctx.fillStyle = 'red';
ctx.fillRect(r1.x, r1.y, r1.w, r1.h);
r1.draw(ctx);
r1.move(0, 150);
r1.draw(ctx);
rectInstancie = new Rect(150, 150, 80, 100, 'green');
drawRectangleVert(ctx);
//mainloop();
ctx.fillStyle = 'rgba(255, 255, 255, 0.5)';
ctx.strokeStyle = 'Blue';
ctx.lineWidth = 10
ctx.strokeRect(150, 10, 100, 100);
}
function drawRectangleVert(ctx) {
rectInstancie.draw(ctx);
}
function mainloop(temps) {
// boucle d'animation
// 1 - On efface le contenu du canvas
ctx.clearRect(0, 0, w, h);
// 2 - on dessine
drawRectangleVert(ctx);
// 3 on deplace
rectInstancie.move(1, -5);
// 4 - on rappelle la boucle pour une
// nouvelle frame d'animation à 60 images/s
requestAnimationFrame(mainloop);
}
// Objet "statique", singleton
var r1 = {
x:10,
y: 10,
w : 80,
h: 100,
draw: function(ctx) {
ctx.fillRect(this.x, this.y, this.w, this.h);
},
move: function(tx, ty) {
this.x += tx;
this.y += ty;
}
}
// Une pseudo classe (ça s'appelle une
// "fonction-constructeur)
function Rect(x, y, w, h, c) {
this.x = x;
this.y = y;
this.w = w;
this.h = h;
this.color = c;
this.draw = function(ctx) {
ctx.fillStyle = this.color;
ctx.fillRect(this.x, this.y, this.w, this.h);
}
this.move= function(tx, ty) {
this.x += tx;
this.y += ty;
}
}
// troisième méthode (celle que je préfère)
// Black Box model/design
function RectBB() {
var x=10;
function test() {
console.log("x = " + x);
}
// ICI ON DEFINIT L'API
return {
afficheX: test,
x:x
}
}
</script>
</head>
<body onload='init();'>
<canvas width=300 height=300 id="myCanvas"></canvas>
</body>
</html>
#myCanvas {
border: 1px solid black;
background-color: lightGrey;
}
Output
You can jump to the latest bin by adding /latest
to your URL
Keyboard Shortcuts
Shortcut | Action |
---|---|
ctrl + [num] | Toggle nth panel |
ctrl + 0 | Close focused panel |
ctrl + enter | Re-render output. If console visible: run JS in console |
Ctrl + l | Clear the console |
ctrl + / | Toggle comment on selected lines |
ctrl + ] | Indents selected lines |
ctrl + [ | Unindents selected lines |
tab | Code complete & Emmet expand |
ctrl + shift + L | Beautify code in active panel |
ctrl + s | Save & lock current Bin from further changes |
ctrl + shift + s | Open the share options |
ctrl + y | Archive Bin |
Complete list of JS Bin shortcuts |
JS Bin URLs
URL | Action |
---|---|
/ | Show the full rendered output. This content will update in real time as it's updated from the /edit url. |
/edit | Edit the current bin |
/watch | Follow a Code Casting session |
/embed | Create an embeddable version of the bin |
/latest | Load the very latest bin (/latest goes in place of the revision) |
/[username]/last | View the last edited bin for this user |
/[username]/last/edit | Edit the last edited bin for this user |
/[username]/last/watch | Follow the Code Casting session for the latest bin for this user |
/quiet | Remove analytics and edit button from rendered output |
.js | Load only the JavaScript for a bin |
.css | Load only the CSS for a bin |
Except for username prefixed urls, the url may start with http://jsbin.com/abc and the url fragments can be added to the url to view it differently. |