How to achieve the custom effect of having a ring in the middle of the front-end progress bar and displaying mouse prompt information?

Create a personalized front-end progress bar: with ring and mouse prompts

In front-end development, it is often necessary to create custom progress bars that meet the design draft requirements. For example, a progress bar with a central ring and displays prompt information when the mouse is hovering. This article will explore how to achieve this effect.

According to design requirements, we can consider the following implementation solutions:

Solution 1: Use ready-made UI component libraries (such as Element UI Progress components)

This approach is quick and convenient, but it is often difficult to precisely control the details of the progress bar, such as adding custom rings in the center, and limited flexibility in style adjustments.

Solution 2: Pure native JavaScript implementation

Through HTML, CSS, and JavaScript native code, we can fully control every aspect of the progress bar and achieve highly customized effects. This is the recommended solution in this article.

Solution 3: Other methods

Other solutions include using third-party libraries for frameworks such as React and Vue, or using CSS3 animation to achieve progress bar effects.

Let's dive into how to solve the core problem:

1. Central ring effect:

   We can represent the progress bar with one div element and use another div element as the central ring. The precise determination of the ring is located in the center of the progress bar through position: absolute of CSS. The circular effect of the ring is created by border-radius property of CSS. For specific implementation, you can consider: the progress bar div setting floats to the right, the length is dynamically calculated based on the progress percentage, and then the ring is absolutely positioned at the end of the progress bar.

2. Mouse hover prompt message:

   Add mousemove event listener to the progress bar. In the event handling function, the current progress percentage is calculated based on the mouse position and the corresponding prompt information is displayed dynamically, such as using a tooltip element.

Through the above methods, we can create a custom progress bar that fully meets the requirements of the design draft, and has a high degree of style and functional flexibility.

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