How to customize theme styles using Vue and Element-UI

How to use Vue and Element-UI to customize theme styles

Introduction:
With the popularity and widespread application of Vue, using the Vue framework with the Element-UI component library in front-end development has become a common choice . However, when we want to customize the theme style according to project needs, using the preset theme style may not meet our requirements. Therefore, this article will introduce how to use Vue and Element-UI to customize theme styles through detailed code examples.

1. Set up the project environment
   Before we start, we need to introduce the Element-UI component library into the Vue project. First, install Element-UI through the following command:

   npm install element-ui

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   Then, introduce Element-UI and its styles in the main.js file of the project

   import Vue from 'vue'
   import ElementUI from 'element-ui'
   import 'element-ui/lib/theme-chalk/index.css'
   
   Vue.use(ElementUI)

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2. Create a custom theme
   To customize theme styles, we need to create a new theme file. Create a file named theme.scss in the src/assets folder. In this file, we can use SASS syntax to define our theme styles.

Here is an example to customize the button style of Element-UI by changing the theme color:

// 主题颜色
$primary-color: #42b983;

// 按钮样式
.el-button {
  background-color: $primary-color;
  color: white;

  // 鼠标悬停样式
  &:hover {
    background-color: darken($primary-color, 10%);
  }
}

3. Configuring Webpack
   In order for Webpack to compile For our custom theme style file, we need to make some configurations. Create the vue.config.js file in the project root directory and add the following code:

   module.exports = {
     css: {
    loaderOptions: {
      sass: {
        additionalData: `@import "@/assets/theme.scss";`
      }
    }
     }
   }

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4. Apply custom theme
   Now, we have set the custom theme style and Webpack is configured. Next, we need to apply the custom theme in the Vue component. You can apply the following code in the App.vue file:

   <template>
     <div id="app">
    <el-button>按钮</el-button>
     </div>
   </template>
   
   <style>
   .el-button {
     // 使用主题样式
     @include theme(component, 'el-button');
   }
   </style>

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5. Run the project
   After completing the above steps, we can use the following command to run the project:

   npm run serve

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With custom theme styles, we have successfully changed the background color of Element-UI buttons and applied the corresponding styles on mouseover.

Summary:
Through this article, we learned how to use Vue and Element-UI to customize theme styles. First, we create a new theme file and define the styles we want in it. Next, we configured Webpack to compile our theme style files. Finally, we applied a custom theme style in the Vue component and successfully changed the style of the Element-UI component.

Using Vue and Element-UI to customize theme styles can better meet the design needs of our project and bring a better user experience. I hope this article can be helpful to you and inspire you to learn and explore more deeply about Vue and Element-UI.

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