less使用手记 主题切换 全局import less

Posted 2022-05-23 cxscode

实现主题颜色切换

components/theme.less，跟据@theme读取主题布局

@theme: dark;

.dark-theme (@transparency) when (@theme = default) 
  color: rgba(0, 0, 0, @transparency);


.dark-theme (@transparency) when (@theme = dark) 
  color: rgba(255, 255, 255, @transparency);


.dark-theme-color (@transparency) when (@theme = default) 
  color: rgba(0, 0, 0, @transparency);


.dark-theme-color (@transparency) when (@theme = dark) 
  color: rgba(255, 255, 255, @transparency);

　　

引用theme.less

<style lang="less" scoped>
  @import ‘~@comp/theme.less‘;
  .title 
    .dark-theme-color(0.85);
    font-size: 16px;
    font-weight: 500;
    margin-bottom: 16px;
  
</style>

　　

需先在vue.config.js做配置

chainWebpack: (config) => 
    config.resolve.alias
      .set(‘@$‘, resolve(‘src‘))
      .set(‘@api‘, resolve(‘src/api‘))
      .set(‘@assets‘, resolve(‘src/assets‘))
      .set(‘@comp‘, resolve(‘src/components‘))
      .set(‘@views‘, resolve(‘src/views‘))
      .set(‘@layout‘, resolve(‘src/layout‘))
      .set(‘@static‘, resolve(‘src/static‘))

　　

这样就可以实现主题化

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这里有一个问题，就是有用到theme.less都要引入一次，很不方便

接下来实现全局加载theme.less

首先用npm或者yarn这三个

vue-cli-plugin-style-resources-loader
style-resources-loader
sass-resources-loader（前面两个装完不生效的话，可以尝试装它）

 然后在vue.config.js新增pluginOptions配置

pluginOptions: 
    ‘style-resources-loader‘: 
      preProcessor: ‘less‘,
      patterns: [path.resolve(__dirname, ‘src/assets/css/theme.less‘)]
    

最后将theme.less移到src/assets/css/重新 run 一下就可以了