drawing on canvas

IhwanID · IhwanID · commit fe9915655dcf · 2024-01-21T00:52:24.000+07:00
diff --git a/08 - Fun with HTML5 Canvas/index-START.html b/08 - Fun with HTML5 Canvas/index-START.html
@@ -8,6 +8,36 @@
 <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';
+  ctx.lineWidth = 100;
+  
+  let isDrawing = false;
+  let lastX = 0;
+  let lastY = 0;
+
+  function draw(e){
+    if(!isDrawing) return;
+    console.log(e);
+    ctx.beginPath();
+    ctx.moveTo(lastX, lastY);
+    ctx.lineTo(e.offsetX, e.offsetY);
+    ctx.stroke();
+    [lastX, lastY] = [e.offsetX, e.offsetY];
+  }
+
+  canvas.addEventListener('mousemove', draw);
+  canvas.addEventListener('mousedown', (e) => {
+    isDrawing = true;
+    [lastX, lastY] = [e.offsetX, e.offsetY];
+  });
+  canvas.addEventListener('mouseup', () => isDrawing = false);
+  canvas.addEventListener('mouseout', () => isDrawing = false);
 </script>
 
 <style>
