dos

Public/static/js/common.js

@@ -47,7 +47,7 @@ window.requestAnimationFrame =
         window.setTimeout(callback, 1000 / 60);
     };
 
-var canvas, ctx, w, h, particles = [],
+var fireworkCanvas, fireworkCtx, w, h, particles = [],
     probability = 0.04,
     xPoint, yPoint;
 
@@ -261,7 +261,7 @@ function update() {
 function paint() {
     fireworkCtx.globalCompositeOperation = 'lighter';
     for (var i = 0; i < particles.length; i++) {
-        particles[i].draw(ctx);
+        particles[i].draw(fireworkCtx);
         for (k in particles[i].children) {
             particles[i].children[k].w -= 0.205
             particles[i].children[k].draw(fireworkCtx)
@@ -309,8 +309,8 @@ Particle.prototype = {
         this.vy += this.gravity;
         this.y += this.vy;
         this.alpha -= 0.01;
-        if (this.x <= -this.w || this.x >= canvas.width ||
-            this.y >= canvas.height ||
+        if (this.x <= -this.w || this.x >= fireworkCanvas.width ||
+            this.y >= fireworkCanvas.height ||
             this.alpha <= 0) {
             this.alpha = 0
             return false;