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• 引用ant-design-vue/dist/antd.less主题样式报错

./node_modules/ant-design-vue/dist/antd.less (./node_modules/css-loader/dist/cjs.js??ref–10-oneOf-3-1!./node_modules/postcss-loader/src??ref–10-oneOf-3-2!./node_modules/less-loader/dist/cjs.js??ref–10-oneOf-3-3!./node_modules/ant-design-vue/dist/antd.less)
Module build failed (from ./node_modules/less-loader/dist/cjs.js):

// https://github.com/ant-design/ant-motion/issues/44
.bezierEasingMixin();

....

根据提示我们可以去https://github.com/ant-design/ant-motion/issues/44看到一个解决问题的帖子。

比较推荐的一种做法是创建一个vue.config.js文件，并写入

module.exports = {
  css: {
    loaderOptions: {
      less: {
        javascriptEnabled: true
      }
    }
  }
}

但是在 less-loader 6.0 之前 这样配置就可以了，但是升级到了 6.0 就会报错

错误信息：

ERROR in ./node_modules/ant-design-vue/dist/antd.less (./node_modules/css-loader/dist/cjs.js??clonedRuleSet-34[0].rules[0].use[1]!./node_modules/postcss-loader/dist/cjs.js??clonedRuleSet-34[0].rules[0].use[2]!./node_modules/less-loader/dist/cjs.js??clonedRuleSet-34[0].rules[0].use[3]!./node_modules/ant-design-vue/dist/antd.less)
Module build failed (from ./node_modules/less-loader/dist/cjs.js):
ValidationError: Invalid options object. Less Loader has been initialized using an options object that does not match the API schema.
 - options has an unknown property 'javascriptEnabled'. These properties are valid:
   object { lessOptions?, additionalData?, sourceMap?, webpackImporter?, implementation? }
 @ ./node_modules/ant-design-vue/dist/antd.less 4:14-241 15:3-20:5 16:22-249
 @ ./src/main.js 10:0-39

如果less-loader版本大于6.0使用下面配置：

const { defineConfig } = require("@vue/cli-service");
module.exports = defineConfig({
  transpileDependencies: true,
  css: {
    loaderOptions: {
      less: {
        lessOptions: {
          javascriptEnabled: true,
          // 兼容 less-loader 3.x
          math: "always",
        }
      }
    }
  }
});

• 注意：

如果是less4.x以上可以能出现如下错误：
Syntax Error:

position: absolute;
top: 8px + @font-size-base * @line-height-base / 2 - @font-size-base / 2;
^
Operation on an invalid type



less 4 语法有改动
top: 8px + @font-size-base * @line-height-base / 2 - @font-size-base / 2;
这个是不合法的，改成
top: 8px + (@font-size-base * @line-height-base / 2) - (@font-size-base / 2);
要么降级 less 到 3.x版本或者使用上边的兼容配置

vue.config.js的文件格式可以参看

cli官网


两种方式根据自己情况选择。