Why does using the class name style of the official website example in the element-plus project have no effect?

Element Plus class name style usage guide and problem check

When using Element Plus, developers often encounter the problem that the official website sample class name style fails in their own projects. For example, the class names such as grid-content ep-bg-purple-dark used in the official website layout example may not take effect in actual projects.

This is because these class names are not styles that come with Element Plus components, but are specially customized for the official website sample page. Class names like ep-bg-purple-dark are usually defined in the CSS file of the official website example, not in the Element Plus core library. grid-content may also be the auxiliary class name defined in the example.

Therefore, directly copying the class name in the official website example to the project will not automatically apply the style. To solve this problem, you need to introduce these styles manually. The following methods can be solved:

Method 1: Copy and paste the style code

1. Find the style code: Visit the Element Plus official website, find the sample code you need, and view its corresponding CSS code. Usually these codes will be in the source code of the official website or on the sample page.

2. 添加到项目: 将找到的 CSS 代码复制到你的项目中的一个 CSS 文件中 (例如，element-plus-custom.css)。 确保这个 CSS 文件被正确引入到你的项目中。

3. 使用类名: 现在你就可以在你的组件中使用这些类名了。

方法二：创建自定义样式

与其直接复制官网示例的样式，更好的方法是根据官网示例的样式，创建你自己的自定义样式。 这能更好地保持项目代码的一致性和可维护性。

1. 分析样式: 观察官网示例中类名的样式效果，理解其颜色、字体、布局等属性。

2. 编写自定义样式: 在你的项目中创建一个 CSS 文件，编写与官网示例样式类似的自定义样式，并使用你自己的类名。 例如，你可以使用更具描述性的类名，例如 my-grid-content 和 my-purple-background。

3. 应用自定义样式: 在你的组件中使用你自定义的类名。

代码示例 (方法二)：

假设你想复制 ep-bg-purple-dark 的样式效果，你可以这样做：

my-styles.css:

.my-purple-background {
  background-color: #304156; /*  根据官网示例调整颜色值 */
}

Vue 组件:

<template>
  <div class="my-purple-background">
    This div will have a dark purple background.
  </div>
</template>

<style scoped>
  @import "./my-styles.css";
</style><strong>Important:</strong> The styles of the official website examples may depend on other styles or variables to ensure that the styles you copied or created can run correctly in your project environment. It is recommended to double-check the full code of the official website example to make sure you understand all dependencies. Avoid relying directly on the class name of the official website example, instead you should understand its style and create your own custom styles, which will make your project easier to maintain and expand.

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