vue-cli3.0中使用rem

1.安裝lib-flexible插件

npm i --save-dev lib-flexible

2.在main.js里引入

import 'lib-flexible'

3.安裝postcss-px2rem插件

npm i --save-dev postcss-px2rem

4.新建vue.config.js,粘貼下面代碼

module.exports = {
    css: {
        loaderOptions: {
            css: {},
            postcss: {
                plugins: [
                    require('postcss-px2rem')({
                        remUnit: 75
                    })
                ]
            }
        }
    }
}