feat: do not apply plug-in if file does not contain styleName attribute

README.md

@@ -198,6 +198,7 @@ Configure the options for the plugin within your `.babelrc` as follows:
 |`webpackHotModuleReloading`|`boolean`|Enables hot reloading of CSS in webpack|`false`|
 |`handleMissingStyleName`|`"throw"`, `"warn"`, `"ignore"`|Determines what should be done for undefined CSS modules (using a `styleName` for which there is no CSS module defined).  Setting this option to `"ignore"` is equivalent to setting `errorWhenNotFound: false` in [react-css-modules](https://github.com/gajus/react-css-modules#errorwhennotfound). |`"throw"`|
 |`attributeNames`|`?AttributeNameMapType`|Refer to [Custom Attribute Mapping](#custom-attribute-mapping)|`{"styleName": "className"}`|
+|`skip`|`boolean`|Whether to apply plugin if no matching `attributeNames` found in the file|`false`|
 
 Missing a configuration? [Raise an issue](https://github.com/gajus/babel-plugin-react-css-modules/issues/new?title=New%20configuration:).
 

src/attributeNameExists.js

@@ -0,0 +1,31 @@
+// @flow
+
+import optionsDefaults from './schemas/optionsDefaults';
+
+const attributeNameExists = (programPath: *, stats: *): boolean => {
+  let exists = false;
+
+  let attributeNames = optionsDefaults.attributeNames;
+
+  if (stats.opts && stats.opts.attributeNames) {
+    attributeNames = Object.assign({}, attributeNames, stats.opts.attributeNames);
+  }
+
+  programPath.traverse({
+    JSXAttribute (attrPath: *) {
+      if (exists) {
+        return;
+      }
+
+      const attribute = attrPath.node;
+
+      if (typeof attribute.name !== 'undefined' && typeof attributeNames[attribute.name.name] === 'string') {
+        exists = true;
+      }
+    }
+  });
+
+  return exists;
+};
+
+export default attributeNameExists;

src/index.js

@@ -14,6 +14,7 @@ import createObjectExpression from './createObjectExpression';
 import requireCssModule from './requireCssModule';
 import resolveStringLiteral from './resolveStringLiteral';
 import replaceJsxExpressionContainer from './replaceJsxExpressionContainer';
+import attributeNameExists from './attributeNameExists';
 
 const ajv = new Ajv({
   // eslint-disable-next-line id-match
@@ -31,6 +32,8 @@ export default ({
 }) => {
   const filenameMap = {};
 
+  let skip = false;
+
   const setupFileForRuntimeResolution = (path, filename) => {
     const programPath = path.findParent((parentPath) => {
       return parentPath.isProgram();
@@ -147,7 +150,7 @@ export default ({
     inherits: babelPluginJsxSyntax,
     visitor: {
       ImportDeclaration (path: *, stats: *): void {
-        if (notForPlugin(path, stats)) {
+        if (skip || notForPlugin(path, stats)) {
           return;
         }
 
@@ -183,6 +186,10 @@ export default ({
         }
       },
       JSXElement (path: *, stats: *): void {
+        if (skip) {
+          return;
+        }
+
         const filename = stats.file.opts.filename;
 
         if (stats.opts.exclude && isFilenameExcluded(filename, stats.opts.exclude)) {
@@ -250,6 +257,10 @@ export default ({
         filenameMap[filename] = {
           styleModuleImportMap: {}
         };
+
+        if (stats.opts.skip && !attributeNameExists(path, stats)) {
+          skip = true;
+        }
       }
     }
   };

src/schemas/optionsSchema.json

@@ -69,6 +69,9 @@
         }
       },
       "type": "object"
+    },
+    "skip": {
+      "type": "boolean"
     }
   },
   "type": "object"

test/fixtures/react-css-modules/does not apply plugin if no styleName/bar.css

@@ -0,0 +1 @@
+.a {}

test/fixtures/react-css-modules/does not apply plugin if no styleName/input.js

@@ -0,0 +1,3 @@
+import 'bar.css';
+
+<div className="any" />;

test/fixtures/react-css-modules/does not apply plugin if no styleName/options.json

@@ -0,0 +1,11 @@
+{
+  "plugins": [
+    [
+      "../../../../src",
+      {
+        "generateScopedName": "[name]__[local]",
+        "skip": true
+      }
+    ]
+  ]
+}

test/fixtures/react-css-modules/does not apply plugin if no styleName/output.js

@@ -0,0 +1,5 @@
+"use strict";
+
+require("bar.css");
+
+<div className="any" />;