next.config.js

// 目前 next.js 的 tailwindcss 下，cssModule 编译貌似有点问题，所以先配制成这样
module.exports = {
  webpack: (config) => {
    // Find the base rule that contains nested rules (which contains css-loader)
    const rules = config.module.rules.find((r) => !!r.oneOf);

    // Interate over the found rules
    rules.oneOf.forEach((loaders) => {
      // Focus on the the loaders that have an array of `use` statements
      if (Array.isArray(loaders.use)) {
        // Iterate over each of the loaders
        loaders.use.forEach((l) => {
          // Only focus on loaders that are an object and have a `loader` property set to `css-loader`
          if (typeof l !== 'string' && typeof l.loader === 'string' && /(?<!post)css-loader/.test(l.loader)) {
            // If there are no module options originally set, skip this loader
            if (!l.options.modules) return;
            const { getLocalIdent, ...others } = l.options.modules;

            // Create a new options object with the `getLocalIdent` property set to a function
            l.options = {
              ...l.options,
              modules: {
                ...others,
                getLocalIdent: (ctx, localIdentName, localName) => {
                  // If the class name is `dark`, return it instead of hashing it
                  if (localName === 'dark') return localName;
                  // Otherwise, call the original function and return the value
                  return getLocalIdent(ctx, localIdentName, localName);
                },
              },
            };
          }
        });
      }
    });

    return config;
  },
};