Fix issue

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@aet/tailwind",
-  "version": "1.0.20",
+  "version": "1.0.23",
   "license": "MIT",
   "type": "module",
   "scripts": {

src/__tests__/__snapshots__/emit.test.ts.snap

@@ -0,0 +1,27 @@
+// Vitest Snapshot v1, https://vitest.dev/guide/snapshot.html
+
+exports[`emit > supports emitting as CSS module 1`] = `
+"// babel-tailwind:/Users/aet/Documents/Git/babel-tailwind/src/.temp-attr/index.module.css
+var index_default = {
+  "tw-gqn2k6": "index_tw-gqn2k6",
+  "tw-1qtvvjy": "index_tw-1qtvvjy"
+};
+
+import { cx as _cx } from "@emotion/css";
+import { jsx } from "react/jsx-runtime";
+function Hello() {
+  return /* @__PURE__ */ jsx("div", { className: _cx([index_default["tw-gqn2k6"], index_default["tw-1qtvvjy"]]), children: "Hello, world!" });
+}
+export {
+  Hello
+};"
+`;
+
+exports[`emit > supports emitting as CSS module 2`] = `
+".index_tw-gqn2k6 {
+  text-align: center;
+}
+.index_tw-1qtvvjy:hover {
+  font-weight: 600;
+}"
+`;

src/__tests__/attr.test.ts

@@ -1,4 +1,5 @@
 import { describe, it } from "vitest";
+
 import { getBuild, matchSnapshot } from "./utils";
 
 describe("attr", () => {
@@ -61,7 +62,7 @@ describe("attr", () => {
     matchSnapshot(files);
   });
 
-  it.only("fails", async () => {
+  it("fails", async () => {
     const { files } = await compileESBuild({
       clsx: "emotion",
       expectFiles: 2,

src/__tests__/base.test.ts

@@ -1,5 +1,7 @@
 import { describe, expect, it } from "vitest";
+
 import { createPostCSS } from "../index";
+
 import { getBuild, minCSS, name } from "./utils";
 
 describe("babel-tailwind", () => {

src/__tests__/emit.test.ts

@@ -0,0 +1,26 @@
+import { describe, it } from "vitest";
+
+import { getBuild, matchSnapshot } from "./utils";
+
+describe("emit", () => {
+  const compileESBuild = getBuild("attr");
+
+  it("supports emitting as CSS module", async () => {
+    const { files } = await compileESBuild({
+      clsx: "emotion",
+      expectFiles: 2,
+      cssModules: true,
+      javascript: /* tsx */ `
+        export function Hello() {
+          return (
+            <div css={["text-center", { hover: "font-semibold" }]}>
+              Hello, world!
+            </div>
+          );
+        }
+      `,
+    });
+
+    matchSnapshot(files);
+  });
+});

src/__tests__/merge.test.ts

@@ -1,6 +1,8 @@
 /* eslint-disable unicorn/string-content */
 import { describe, expect, it } from "vitest";
+
 import { getClassName } from "../index";
+
 import { getBuild } from "./utils";
 
 describe("merges with existing className attribute", () => {

src/__tests__/options.test.ts

@@ -1,4 +1,5 @@
 import { describe, expect, it } from "vitest";
+
 import { getBuild, matchSnapshot } from "./utils";
 
 describe("options", () => {

src/__tests__/styleObject.test.ts

@@ -1,4 +1,5 @@
 import { describe, it } from "vitest";
+
 import { getBuild, matchSnapshot } from "./utils";
 
 describe("babel-tailwind", () => {

src/__tests__/tw.test.ts

@@ -1,4 +1,5 @@
 import { describe, it } from "vitest";
+
 import { getBuild, matchSnapshot } from "./utils";
 
 describe("babel-tailwind", () => {

src/__tests__/utils.ts

@@ -1,8 +1,10 @@
 import { promises as fs } from "node:fs";
 import { join, resolve } from "node:path";
-import { afterEach, beforeEach, expect } from "vitest";
-import * as esbuild from "esbuild";
+
 import dedent from "dedent";
+import * as esbuild from "esbuild";
+import { afterEach, beforeEach, expect } from "vitest";
+
 import { type TailwindPluginOptions, babelPlugin, getTailwindPlugins } from "../index";
 
 export { name } from "../../package.json" with { type: "json" };

src/babel/index.ts

@@ -35,12 +35,14 @@ function getUtils({
     clsx,
     getClassName: getClass = getClassName,
     vite: bustCache,
+    cssModules,
   } = options;
 
   let cx: t.Identifier;
   let tslibImport: t.Identifier;
   let styleImport: t.Identifier;
   let classedImport: t.Identifier;
+  let cssModuleImport: t.Identifier;
 
   const cssMap = new Map<string, StyleMapEntry>();
   const jsMap = new Map<string, StyleMapEntry>();
@@ -50,6 +52,13 @@ function getUtils({
     return t.cloneNode(styleImport);
   }
 
+  const getCssModuleImport = () => {
+    if (cssModuleImport == null) {
+      cssModuleImport = path.scope.generateUidIdentifier("cssModule");
+    }
+    return t.cloneNode(cssModuleImport);
+  };
+
   return {
     getClass(type: Type, value: string) {
       return type === "css" ? getClass(value) : "tw_" + hash(value);
@@ -65,7 +74,7 @@ function getUtils({
         .join("\n"),
     }),
 
-    recordIfAbsent(type: Type, entry: StyleMapEntry) {
+    recordIfAbsent(type: "css", entry: StyleMapEntry) {
       const map = type === "css" ? cssMap : jsMap;
       if (!map.has(entry.key)) {
         map.set(entry.key, entry);
@@ -125,18 +134,44 @@ function getUtils({
       return t.cloneNode(classedImport);
     },
 
+    getCssModuleImport,
+
+    getClassNameValue: (className: string) => {
+      const validId = t.isValidIdentifier(className);
+      return cssModules
+        ? t.memberExpression(
+            getCssModuleImport(),
+            validId ? t.identifier(className) : t.stringLiteral(className),
+            !validId
+          )
+        : t.stringLiteral(className);
+    },
+
     finish(node: t.Program) {
       const { filename } = state;
       if (!cssMap.size && !jsMap.size) return;
       invariant(filename, "babel: missing state.filename");
 
       if (cssMap.size) {
-        const cssName = basename(filename, extname(filename)) + ".css";
+        const cssName =
+          basename(filename, extname(filename)) +
+          (cssModuleImport ? ".module" : "") +
+          ".css";
         const path = join(dirname(filename), cssName);
         const value = Array.from(cssMap.values());
-        const importee = `tailwind:./${cssName}` + getSuffix(bustCache, value);
 
-        node.body.unshift(t.importDeclaration([], t.stringLiteral(importee)));
+        if (cssModuleImport) {
+          const importee = `tailwind:./${cssName}` + getSuffix(bustCache, value);
+          node.body.unshift(
+            t.importDeclaration(
+              [t.importDefaultSpecifier(cssModuleImport)],
+              t.stringLiteral(importee)
+            )
+          );
+        } else {
+          const importee = `tailwind:./${cssName}` + getSuffix(bustCache, value);
+          node.body.unshift(t.importDeclaration([], t.stringLiteral(importee)));
+        }
 
         styleMap.set(path, value);
         onCollect?.(path, value);
@@ -212,7 +247,7 @@ export function babelTailwind(
               classNames: trimmed,
               location: _.sliceText(node),
             });
-            path.replaceWith(t.stringLiteral(className));
+            path.replaceWith(_.getClassNameValue(className));
           }
         },
         ArrayExpression(path) {
@@ -228,7 +263,7 @@ export function babelTailwind(
             classNames: trimmed,
             location: _.sliceText(path.node),
           });
-          path.replaceWith(t.stringLiteral(className));
+          path.replaceWith(_.getClassNameValue(className));
         },
         JSXExpressionContainer(path) {
           go(path.get("expression"));

src/esbuild-babel.ts

@@ -1,9 +1,10 @@
 import { readFileSync } from "node:fs";
 import { extname } from "node:path";
-import { once } from "lodash-es";
+
 import type babel from "@babel/core";
-import type * as esbuild from "esbuild";
 import { transformSync } from "@babel/core";
+import type * as esbuild from "esbuild";
+import { once } from "lodash-es";
 
 /**
  * An esbuild plugin that processes files with Babel if `plugins` is not empty.

src/index.ts

@@ -19,7 +19,7 @@ export { createPostCSS } from "./shared";
 type GetClassName = (className: string) => string;
 export type BuildStyleFile = (
   path: string
-) => Promise<readonly ["css", string] | readonly ["js", string]>;
+) => Promise<readonly ["css" | "local-css", string] | readonly ["js", string]>;
 
 export interface TailwindPluginOptions {
   /**
@@ -86,6 +86,17 @@ export interface TailwindPluginOptions {
    * Keep the original classnames in the CSS output
    */
   addSourceAsComment?: boolean;
+
+  /**
+   * Emit as CSS modules
+   */
+  cssModules?: boolean;
+
+  /**
+   * Emit type. `css-import` for plain CSS import,
+   * `css-module` for CSS modules, `css-in-js` for JS.
+   */
+  // emitType: "css-import" | "css-module" | "css-in-js";
 }
 
 export type ResolveTailwindOptions = SetRequired<
@@ -121,7 +132,7 @@ export const getClassName: GetClassName = cls => "tw-" + hash(cls);
  * });
  */
 export function getTailwindPlugins(options: TailwindPluginOptions) {
-  const { addSourceAsComment, compile: _compile } = options;
+  const { addSourceAsComment, compile: _compile, cssModules } = options;
   const resolvedOptions: ResolveTailwindOptions = {
     getClassName,
     jsxAttributeAction: "delete",
@@ -155,7 +166,10 @@ export function getTailwindPlugins(options: TailwindPluginOptions) {
         .join("\n")
     );
     if (path.endsWith(".css")) {
-      return ["css", transformSync(compiled, { loader: "css" }).code] as const;
+      return [
+        cssModules ? "local-css" : "css",
+        transformSync(compiled, { loader: "css" }).code,
+      ] as const;
     } else if (path.endsWith(".js")) {
       const js = toJSCode(compiled, x => x.slice(1));
       return ["js", js] as const;
@@ -176,6 +190,7 @@ export function getTailwindPlugins(options: TailwindPluginOptions) {
     styleMap,
     options,
     getCompiler,
+    buildStyleFile,
     [Symbol.dispose]() {
       styleMap.clear();
     },

src/vendor/animate.ts

@@ -1,4 +1,5 @@
 // https://github.com/jamiebuilds/tailwindcss-animate/commit/ac0dd3a3c81681b78f1d8ea5e7478044213995e1
+// https://github.com/tailwindlabs/tailwindcss/discussions/11164#discussioncomment-5819097
 import plugin from "tailwindcss/plugin.js";
 import type { PluginAPI } from "tailwindcss/types/config";
 
@@ -11,11 +12,7 @@ function filterDefault<T extends object>(values: T) {
 export default plugin(
   ({ addUtilities, matchUtilities, theme }) => {
     addUtilities({
-      "@keyframes enter": theme("keyframes.enter"),
-      "@keyframes exit": theme("keyframes.exit"),
       ".animate-in": {
-        animationName: "enter",
-        animationDuration: theme("animationDuration.DEFAULT"),
         "--tw-enter-opacity": "initial",
         "--tw-enter-scale": "initial",
         "--tw-enter-rotate": "initial",
@@ -23,8 +20,6 @@ export default plugin(
         "--tw-enter-translate-y": "initial",
       },
       ".animate-out": {
-        animationName: "exit",
-        animationDuration: theme("animationDuration.DEFAULT"),
         "--tw-exit-opacity": "initial",
         "--tw-exit-scale": "initial",
         "--tw-exit-rotate": "initial",
@@ -168,6 +163,10 @@ export default plugin(
           1: "1",
           infinite: "infinite",
         },
+        animation: ({ theme }) => ({
+          out: `leave ${theme("animationDuration.DEFAULT")}`,
+          in: `enter ${theme("animationDuration.DEFAULT")}`,
+        }),
         keyframes: {
           enter: {
             from: {
@@ -176,7 +175,7 @@ export default plugin(
                 "translate3d(var(--tw-enter-translate-x, 0), var(--tw-enter-translate-y, 0), 0) scale3d(var(--tw-enter-scale, 1), var(--tw-enter-scale, 1), var(--tw-enter-scale, 1)) rotate(var(--tw-enter-rotate, 0))",
             },
           },
-          exit: {
+          leave: {
             to: {
               opacity: "var(--tw-exit-opacity, 1)",
               transform: