[Fix] JSX pragma: fail gracefully

Fixes #3632

CHANGELOG.md

@@ -11,12 +11,15 @@ This change log adheres to standards from [Keep a CHANGELOG](https://keepachange
 
 ### Fixed
 * [`function-component-definition`], [`boolean-prop-naming`], [`jsx-first-prop-new-line`], [`jsx-props-no-multi-spaces`], `propTypes`: use type args ([#3629][] @HenryBrown0)
+* JSX pragma: fail gracefully ([#3632][] @ljharb)
 
 ### Changed
 * [Tests] add @typescript-eslint/parser v6 ([#3629][] @HenryBrown0)
 * [Tests] add @typescript-eslint/parser v7 and v8 ([#3629][] @hampustagerud)
 * [Docs] [`no-danger`]: update broken link ([#3817][] @lucasrmendonca)
 
+[#3632]: https://github.com/jsx-eslint/eslint-plugin-react/issues/3632
+
 [#3629]: https://github.com/jsx-eslint/eslint-plugin-react/pull/3629
 [#3817]: https://github.com/jsx-eslint/eslint-plugin-react/pull/3817
 [#3807]: https://github.com/jsx-eslint/eslint-plugin-react/pull/3807

lib/util/pragma.js

@@ -62,7 +62,8 @@ function getFromContext(context) {
   }
 
   if (!JS_IDENTIFIER_REGEX.test(pragma)) {
-    throw new Error(`React pragma ${pragma} is not a valid identifier`);
+    console.warn(`React pragma ${pragma} is not a valid identifier`);
+    return 'React';
   }
   return pragma;
 }

tests/lib/rules/boolean-prop-naming.js

@@ -505,6 +505,14 @@ ruleTester.run('boolean-prop-naming', rule, {
       options: [{ rule: '(^(is|has|should|without)[A-Z]([A-Za-z0-9]?)+|disabled|required|checked|defaultChecked)' }],
       features: ['types'],
     },
+    {
+      code: `
+        // Strip @jsx comments, see https://github.com/microsoft/fluentui/issues/29126
+        const resultCode = result.code
+          .replace('/** @jsxRuntime automatic */', '')
+          .replace('/** @jsxImportSource @fluentui/react-jsx-runtime */', '');
+      `,
+    },
   ]),
 
   invalid: parsers.all([

tests/util/pragma.js

@@ -56,9 +56,9 @@ describe('pragma', () => {
       );
     });
 
-    it('throws an error if the pragma is invalid', () => {
+    it('returns React if the pragma is invalid', () => {
       const code = '/* @jsx invalid-jsx-pragma */';
-      assert.throws(() => getFromContext(fakeContext(code)));
+      assert.equal(getFromContext(fakeContext(code)), 'React');
     });
   });
 });