renovations

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

@@ -0,0 +1,20 @@
+function animate(options) {
+
+  var start = performance.now();
+
+  requestAnimationFrame(function animate(time) {
+    // timeFraction от 0 до 1
+    var timeFraction = (time - start) / options.duration;
+    if (timeFraction > 1) timeFraction = 1;
+
+    // текущее состояние анимации
+    var progress = options.timing(timeFraction)
+    
+    options.draw(progress);
+
+    if (timeFraction < 1) {
+      requestAnimationFrame(animate);
+    }
+
+  });
+}