Why is the custom class name style in Element-plus invalidating in my project?

Solutions to invalidate Element Plus custom class name

When using the Element Plus component library, developers often encounter the problem of invalidating custom class name styles. For example, the sample code in the official Element Plus documentation may use class names such as grid-content and ep-bg-purple-dark , but it cannot take effect in actual projects.

The reason for the problem is that these class names are not built-in styles for Element Plus, but custom styles added to the documentation examples for demonstration purposes. Class names such as ep-bg-purple-dark , as well as similar ep-bg-purple and ep-bg-purple-light , are usually styles unique to the sample pages and are not part of the Element Plus component library itself. grid-content may also be just the auxiliary class name defined for layout in the example.

Therefore, to reproduce these style effects in your project, you must manually add the corresponding CSS rules. You cannot directly rely on the class names in the official Element Plus documentation examples to get styles.

Here are the steps to solve this problem:

1. Identify custom styles: Double-check the sample code of the Element Plus official documentation to determine which class names are customized and which are included with the Element Plus components.

2. Copy or write CSS: Find the CSS rules that define these custom class names in the sample page (usually on the sample page