Next.js + Antd (with Less)

Use Antd (Less) w/ Next.js, Zero Dependency on other Next-Plugins.

Features

• Zero Dependency on other Next.js Plugins
• Support Hot-Update After modifying Antd less vars
• Support Serverless Mode
• Support Antd Pro

Compatibility

• Next.js v11 / v12

Installation

yarn add next-plugin-antd-less
yarn add --dev babel-plugin-import

Usage

for Next.js

// next.config.js
const withAntdLess = require('next-plugin-antd-less');

module.exports = withAntdLess({
  modifyVars: { '@primary-color': '#04f' }, // optional
  lessVarsFilePath: './src/styles/variables.less', // optional 
  lessVarsFilePathAppendToEndOfContent: false, // optional
  // optional https://github.com/webpack-contrib/css-loader#object
  cssLoaderOptions: {
    // ... 
    mode: "local",
    localIdentName: __DEV__ ? "[local]--[hash:base64:4]" : "[hash:base64:8]", // invalid! for Unify getLocalIdent (Next.js / CRA), Cannot set it, but you can rewritten getLocalIdentFn
    exportLocalsConvention: "camelCase",
    exportOnlyLocals: false,
    // ...
    getLocalIdent: (context, localIdentName, localName, options) => {
      return "whatever_random_class_name";
    },
  },

  // for Next.js ONLY
  nextjs: {
    localIdentNameFollowDev: true, // default false, for easy to debug on PROD mode
  },

  // Other Config Here...

  webpack(config) {
    return config;
  },

  // ONLY for Next.js 10, if you use Next.js 11, delete this block
  future: {
    webpack5: true,
  },
});

Add a .babelrc.js

// .babelrc.js
module.exports = {
  presets: [['next/babel']],
  plugins: [['import', { libraryName: 'antd', style: true }]],
};

Detailed config can be found in next.config.js file.

Default ClassName

| MODE | className | e.g. | | --------- |----------------------------|-----------------------| | DEV | [local]--[hash:base64:4] | comp-wrapper--2Rra | | PROD | [hash:base64:8] | 2Rra8Ryx |

for Unify getLocalIdent (Next.js / CRA), Cannot set it, but you can rewritten getLocalIdentFn

localIdentName is invalid? How to rewritten?

you can defind your own localIdentName in pluginOptions.cssLoaderOptions.modules.getLocalIdent

  options: {
  lessVarsFilePath: './src/styles/variables.less'
  // ...
  // https://github.com/webpack-contrib/css-loader/tree/b7a84414fb3f6e6ff413cbbb7004fa74a78da331#getlocalident
  //
  // and you can see file 
  getLocalIdent: (context, _, exportName, options) => {
    return 'whatever_random_class_name';
  }
  // ...
}

How to import global CSS style (e.g. styles.css)?

// ./page/_app.tsx
//
// use `import` or `require` syntax,
import './styles.css';

How to import global Less style (e.g. styles.less)?

// ./page/_app.tsx
//
// use `require` syntax,
require('./styles.less');

How to overwrite antd less variables?

// ./src/styles/variables.less
@import '~antd/lib/style/themes/default.less'; // <-- you need to import antd variables once in your project

@primary-color: #04f; // change antd primary-color

// 🔰️ Tips: if your use babel import plugin and set `libraryDirectory`, please keep `libraryDirectory` and `less path` consistent.

// lib
['import', { libraryName: 'antd', libraryDirectory: 'lib', style: true }]
// `@import '~antd/lib/style/themes/default.less';` <-- use `lib`

// es
  ['import', { libraryName: 'antd', libraryDirectory: 'es', style: true }]
// --> `@import '~antd/es/style/themes/default.less';` <-- use `es`

// plugin options
lessVarsFilePath: './src/styles/variables.less'

Background

Issues

Since Next.js 9.3 supports sass and css by default, but does not support less. If you use Next.js > 9.3 and use the official less plugin, you will definitely encounter the following problems.

1. CIL Warning Warning: Built-in CSS support is being disabled due to custom CSS configuration being detected.

2. Does not support automatic recognition of css modules, e.g. a.module.less and a.less

Solution

1. Find sassModule and copy onec and replace the sass-loader inside with less-loader.

2. Then enable the modules.auto option of css-loader. This can simply match all *.less (no need to match it is *.module.less or *.less), and hand it over to css-loader.

This is the lowest cost way, And CLI will no longer show this disgusting warning. The important thing is that there is Zero Dependency on other Next-Plugins..