wesbos#8 Completed."

Alexander Besse · Alexander Besse · commit 7bfe0a0b17ea · 2020-03-28T22:31:16.000-05:00
diff --git a/08 - Fun with HTML5 Canvas/index-START.html b/08 - Fun with HTML5 Canvas/index-START.html
@@ -7,6 +7,52 @@
 <body>
 <canvas id="draw" width="800" height="800"></canvas>
 <script>
+  const canvas = document.querySelector("#draw");
+  const ctx = canvas.getContext('2d');
+  canvas.width = window.innerWidth;  
+  canvas.height = window.innerHeight;
+
+  ctx.strokeStyle = '#BADA55';
+  ctx.lineJoin = 'round';
+  ctx.lineCap = 'round';
+
+  let isDrawing = false;
+  let lastX = 0;
+  let lastY = 0;
+  let hue = 0;
+  let dir = true;
+
+  const draw = e => {
+    if(!isDrawing) return;
+    ctx.strokeStyle = `hsl(${hue}, 100%, 50%)`;
+    hue++;
+    if(hue >= 360) hue = 0;
+    ctx.beginPath();
+    ctx.moveTo(lastX, lastY);
+    ctx.lineTo(e.offsetX, e.offsetY);
+    ctx.stroke();
+    lastX = e.offsetX;
+    lastY = e.offsetY;
+
+    if(ctx.lineWidth >= 1000 || ctx.lineWidth <= 1) dir = !dir;
+    if(dir) {
+      ctx.lineWidth++;
+    } else {
+      ctx.lineWidth--;
+    }
+
+    console.log(ctx.lineWidth);
+
+  }
+
+  canvas.addEventListener('mousedown', (e) => {
+    isDrawing = true
+    lastX = e.offsetX;
+    lastY = e.offsetY;
+  });
+
+  canvas.addEventListener('mousemove', draw);
+  canvas.addEventListener('mouseup', () => isDrawing = false);
 </script>
 
 <style>
