![]() Under the hood, it just uses a setTimeout() function to update the progress bar 50 times per second until the new value is reached. Therefore I added the animateTo( percent, time ) function, which automatically changes the value of the progress bar over time seconds to the new percent value. The main reason why I wanted to create a JavaScript class for the progress bar was to have an easy way to animate it. ![]() Besides a reference to the canvas drawing context, the constructor also has an optional options argument that can be used to customize the look and feel of the progress bar. However, I wanted to add a few more features and encapsulate everything in a JavaScript class. ![]() ![]() Creating a JavaScript ClassĪs you can see from the example above, it’s very easy to create a basic circular progress bar. ![]()
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