Front-end progress bar: clever implementation of ring effect and mouse prompt information

This article discusses how to build a front-end progress bar that has both round visual effects and mouse hover prompt information. We will analyze multiple implementation solutions based on a specific case and ultimately give best practices.

In the design draft, the length of the progress bar and the position of the central ring will be dynamically adjusted according to the progress, and a progress prompt will be displayed when the mouse hovers.

Plan analysis and trade-offs

1. Utilize existing UI component libraries: For example, component libraries such as Ant Design or Element UI provide progress bar components, but customizing ring effects and precise control of prompt information may be difficult, requiring in-depth understanding of the internal mechanism of the component and making extensive modifications.

2. Pure native JavaScript implementation: This solution has a high degree of flexibility and can fully meet design needs, but the code volume is large and the development and maintenance costs are relatively high.

3. Combining SVG and CSS: Using SVG to draw rings and using CSS to control styles and animations can achieve finer visual effects and smoother animations.

Core Challenge

1. Dynamic ring positioning: The ring needs to always be at the end of the progress bar and move as the progress changes.

2. Mouse prompt information: The progress value needs to be displayed when the mouse is hovered, and the style and position of the prompt box are considered.

Recommended solution: SVG CSS JavaScript

This solution combines SVG's graphics capabilities, CSS style control, and dynamic interaction of JavaScript to achieve the desired effect efficiently.

step:

1. Drawing a ring with SVG: Create a<svg></svg> element, in which a circle is drawn. The radius and position of the ring can be adjusted as needed.

2. CSS style control: Use CSS to control the color, thickness and other styles of the ring, and use CSS animation or conversion properties to achieve the animation effect when progress changes.

3. JavaScript dynamic update: Use JavaScript to listen for progress changes, and dynamically update the position of the SVG ring and the length of the progress bar according to the progress value. At the same time, add a mousemove event listener to display prompt information when hovering, and use mouseout event to hide prompt information. You can use title attribute or create a separate prompt box element.

Through this solution, we can flexibly control all aspects of the progress bar, and achieve smooth animation effects and clear mouse prompt information, perfectly meeting the needs of the design draft. The code implementation is relatively simple and easy to maintain and expand.

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