Merge pull request #5824 from davepagurek/fix/setattributes

Make sure setAttributes updates lingering references to the old canvas

Author: Qianqianye

src/webgl/p5.RendererGL.js

@@ -297,6 +297,7 @@ p5.RendererGL.prototype._resetContext = function(options, callback) {
       document.body.appendChild(c);
     }
     this._pInst.canvas = c;
+    this.canvas = c;
   }
 
   const renderer = new p5.RendererGL(

test/unit/webgl/p5.RendererGL.js

@@ -756,4 +756,15 @@ suite('p5.RendererGL', function() {
       done();
     });
   });
+
+  suite('setAttributes', function() {
+    test('It leaves a reference to the correct canvas', function(done) {
+      const renderer = myp5.createCanvas(10, 10, myp5.WEBGL);
+      assert.equal(myp5.canvas, renderer.canvas);
+
+      myp5.setAttributes({ alpha: true });
+      assert.equal(myp5.canvas, renderer.canvas);
+      done();
+    });
+  });
 });