retour au cours
Ce contenu n'est disponible que dans les langues suivantes :عربي, English, Español, فارسی, Indonesia, Italiano, 日本語, Русский, Українська, 简体中文. Merci de

In the task Animated circle an animated growing circle is shown.

Now let’s say we need not just a circle, but to show a message inside it. The message should appear after the animation is complete (the circle is fully grown), otherwise it would look ugly.

In the solution of the task, the function showCircle(cx, cy, radius) draws the circle, but gives no way to track when it’s ready.

Add a callback argument: showCircle(cx, cy, radius, callback) to be called when the animation is complete. The callback should receive the circle <div> as an argument.

Here’s the example:

showCircle(150, 150, 100, div => {
  div.append("Hello, world!");


Take the solution of the task Animated circle as the base.