Fix React auto-import blocking component imports in --preserve (microsoft#46368)

Author: andrewbranch

src/services/codefixes/importFixes.ts

@@ -766,9 +766,13 @@ namespace ts.codefix {
         return { fixes, symbolName };
     }
 
+    function jsxModeNeedsExplicitImport(jsx: JsxEmit | undefined) {
+        return jsx === JsxEmit.React || jsx === JsxEmit.ReactNative;
+    }
+
     function getSymbolName(sourceFile: SourceFile, checker: TypeChecker, symbolToken: Identifier, compilerOptions: CompilerOptions): string {
         const parent = symbolToken.parent;
-        if ((isJsxOpeningLikeElement(parent) || isJsxClosingElement(parent)) && parent.tagName === symbolToken && compilerOptions.jsx !== JsxEmit.ReactJSX && compilerOptions.jsx !== JsxEmit.ReactJSXDev) {
+        if ((isJsxOpeningLikeElement(parent) || isJsxClosingElement(parent)) && parent.tagName === symbolToken && jsxModeNeedsExplicitImport(compilerOptions.jsx)) {
             const jsxNamespace = checker.getJsxNamespace(sourceFile);
             if (isIntrinsicJsxName(symbolToken.text) || !checker.resolveName(jsxNamespace, parent, SymbolFlags.Value, /*excludeGlobals*/ true)) {
                 return jsxNamespace;

tests/cases/fourslash/importNameCodeFix_jsxReact17.ts

@@ -0,0 +1,31 @@
+/// <reference path="fourslash.ts" />
+
+// @jsx: preserve
+// @module: commonjs
+
+// @Filename: /node_modules/@types/react/index.d.ts
+//// declare namespace React {
+////   function createElement(): any;
+//// }
+//// export = React;
+//// export as namespace React;
+////
+//// declare global {
+////   namespace JSX {
+////     interface IntrinsicElements {}
+////     interface IntrinsicAttributes {}
+////   }  
+//// }
+
+// @Filename: /component.tsx
+//// import "react";
+//// export declare function Component(): any;
+
+// @Filename: /index.tsx
+//// (<Component/**/ />);
+
+goTo.marker("");
+verify.importFixAtPosition([`import { Component } from "./component";
+
+(<Component />);`]);
+