components

7-animation/3-js-animation/width.view/animate.js

@@ -0,0 +1,18 @@
+function animate({duration, draw, timing}) {
+
+  let start = performance.now();
+
+  requestAnimationFrame(function animate(time) {
+    let timeFraction = (time - start) / duration;
+    if (timeFraction > 1) timeFraction = 1;
+
+    let progress = timing(timeFraction)
+
+    draw(progress);
+
+    if (timeFraction < 1) {
+      requestAnimationFrame(animate);
+    }
+
+  });
+}