feat: remove .ts/.tsx/.d.ts first, and then fallback to @types/*

Author: JounQin

Diff for: index.js

@@ -25,11 +25,9 @@ function resolveFile(source, file, config) {
   }
 
   let foundTsPath = null;
-  const extensions = Object.keys(require.extensions).concat(
-    '.ts',
-    '.tsx',
-    '.d.ts',
-  );
+  const extensions = Object.keys(require.extensions);
+
+  extensions.unshift('.ts', '.tsx', '.d.ts');
 
   // setup tsconfig-paths
   const searchStart = config.directory || process.cwd();
@@ -54,25 +52,28 @@ function resolveFile(source, file, config) {
 
   // note that even if we match via tsconfig-paths, we still need to do a final resolve
   let foundNodePath;
-  const basedir = path.dirname(path.resolve(file))
   try {
     foundNodePath = resolve.sync(foundTsPath || source, {
       extensions,
-      basedir,
+      basedir: path.dirname(path.resolve(file)),
       packageFilter,
     });
   } catch (err) {
     foundNodePath = null;
   }
 
-  if (foundNodePath && /\.jsx?$/.test(foundNodePath)) {
-    try {
-      foundNodePath = resolve.sync(foundTsPath || source, {
-        extensions: ['.d.ts'],
-        basedir,
-        packageFilter,
-      });
-    } catch (err) {}
+  // naive attempt at @types/* resolution,
+  // iff path is neither absolute nor relative
+  if (
+    /\.jsx?$/.test(foundNodePath) &&
+    !/^@types[\/\\]/.test(source) &&
+    !path.isAbsolute(source) &&
+    source[0] !== '.'
+  ) {
+    const definitely = resolveFile('@types/' + source, file, config);
+    if (definitely.found) {
+      return definitely;
+    }
   }
 
   if (foundNodePath) {