[Fix] no-unresolved: ignore type-only imports

Author: jablko

config/typescript.js

@@ -2,7 +2,10 @@
  * Adds `.jsx`, `.ts` and `.tsx` as an extension, and enables JSX/TSX parsing.
  */
 
-const allExtensions = ['.ts', '.tsx', '.d.ts', '.js', '.jsx'];
+// Omit `.d.ts` because 1) TypeScript compilation already confirms that
+// types are resolved, and 2) it would mask an unresolved
+// `.ts`/`.tsx`/`.js`/`.jsx` implementation.
+const allExtensions = ['.ts', '.tsx', '.js', '.jsx'];
 
 module.exports = {
 
@@ -24,6 +27,5 @@ module.exports = {
 
     // TypeScript compilation already ensures that named imports exist in the referenced module
     'import/named': 'off',
-    'import/no-unresolved': 'off',
   },
 };

src/rules/no-unresolved.js

@@ -27,6 +27,11 @@ module.exports = {
     const options = context.options[0] || {};
 
     function checkSourceValue(source) {
+      // ignore type-only imports
+      if (source.parent && source.parent.importKind === 'type') {
+        return;
+      }
+
       const caseSensitive = !CASE_SENSITIVE_FS && options.caseSensitive !== false;
       const caseSensitiveStrict = !CASE_SENSITIVE_FS && options.caseSensitiveStrict;