From 762fb1654c15305525faedf682eb2edaa4a10d88 Mon Sep 17 00:00:00 2001
From: April Arcus <ril@google.com>
Date: Mon, 4 Oct 2021 09:12:14 -0700
Subject: [PATCH] support named exports

---
 src/index.js |  6 +++++-
 src/utils.js | 14 ++++++++++++++
 2 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/src/index.js b/src/index.js
index 04b6b99..222a92f 100644
--- a/src/index.js
+++ b/src/index.js
@@ -3,6 +3,7 @@ const {
   filenameToPascalCase,
   filenameToTypingsFilename,
   getCssModuleKeys,
+  getNamedExports,
   generateGenericExportInterface,
 } = require("./utils");
 const persist = require("./persist");
@@ -63,9 +64,12 @@ module.exports = function (content, ...args) {
 
   // let's only check `exports.locals` for keys to avoid getting keys from the sourcemap when it's enabled
   // if we cannot find locals, then the module only contains global styles
+  const isModule = /(?:^|\n)export\s+(?:var|let|const)\s+\S+\s*=/g.test(content)
   const indexOfLocals = content.indexOf(".locals");
   const cssModuleKeys =
-    indexOfLocals === -1
+    isModule
+      ? getNamedExports(content)
+      : indexOfLocals === -1
       ? []
       : getCssModuleKeys(content.substring(indexOfLocals));
 
diff --git a/src/utils.js b/src/utils.js
index 8cc032c..332cfe4 100644
--- a/src/utils.js
+++ b/src/utils.js
@@ -19,6 +19,19 @@ const getCssModuleKeys = (content) => {
   return cssModuleKeys;
 };
 
+const getNamedExports = (content) => {
+  const exportRegex = /(?:^|\n)export\s+(?:var|let|const)\s+(\S+?)\s*=/g;
+  let match;
+  const namedExports = [];
+
+  while ((match = exportRegex.exec(content))) {
+    if (namedExports.indexOf(match[1]) < 0) {
+      namedExports.push(match[1]);
+    }
+  }
+  return namedExports;
+};
+
 /**
  * @param {string} filename
  */
@@ -80,6 +93,7 @@ export = ${moduleName};`;
 
 module.exports = {
   getCssModuleKeys,
+  getNamedExports,
   filenameToPascalCase,
   filenameToTypingsFilename,
   generateGenericExportInterface,