feat(napi/transform): add jsx: 'preserve' option (#7965)

closes #7958

crates/oxc_transformer/src/jsx/options.rs

@@ -109,6 +109,20 @@ pub struct JsxOptions {
 
 impl Default for JsxOptions {
     fn default() -> Self {
+        Self::enable()
+    }
+}
+
+impl JsxOptions {
+    pub fn conform(&mut self) {
+        if self.development {
+            self.jsx_plugin = true;
+            self.jsx_self_plugin = true;
+            self.jsx_source_plugin = true;
+        }
+    }
+
+    pub fn enable() -> Self {
         Self {
             jsx_plugin: true,
             display_name_plugin: true,
@@ -126,14 +140,23 @@ impl Default for JsxOptions {
             refresh: None,
         }
     }
-}
 
-impl JsxOptions {
-    pub fn conform(&mut self) {
-        if self.development {
-            self.jsx_plugin = true;
-            self.jsx_self_plugin = true;
-            self.jsx_source_plugin = true;
+    pub fn disable() -> Self {
+        Self {
+            jsx_plugin: false,
+            display_name_plugin: false,
+            jsx_self_plugin: false,
+            jsx_source_plugin: false,
+            runtime: JsxRuntime::default(),
+            development: false,
+            throw_if_namespace: false,
+            pure: false,
+            import_source: None,
+            pragma: None,
+            pragma_frag: None,
+            use_built_ins: None,
+            use_spread: None,
+            refresh: None,
         }
     }
 }

napi/transform/index.d.ts

@@ -259,7 +259,7 @@ export interface TransformOptions {
   /** Configure how TypeScript is transformed. */
   typescript?: TypeScriptOptions
   /** Configure how TSX and JSX are transformed. */
-  jsx?: JsxOptions
+  jsx?: 'preserve' | JsxOptions
   /**
    * Sets the target environment for the generated JavaScript.
    *

napi/transform/src/transformer.rs

@@ -106,7 +106,8 @@ pub struct TransformOptions {
     pub typescript: Option<TypeScriptOptions>,
 
     /// Configure how TSX and JSX are transformed.
-    pub jsx: Option<JsxOptions>,
+    #[napi(ts_type = "'preserve' | JsxOptions")]
+    pub jsx: Option<Either<String, JsxOptions>>,
 
     /// Sets the target environment for the generated JavaScript.
     ///
@@ -150,7 +151,17 @@ impl TryFrom<TransformOptions> for oxc::transformer::TransformOptions {
                 .typescript
                 .map(oxc::transformer::TypeScriptOptions::from)
                 .unwrap_or_default(),
-            jsx: options.jsx.map(Into::into).unwrap_or_default(),
+            jsx: match options.jsx {
+                Some(Either::A(s)) => {
+                    if s == "preserve" {
+                        oxc::transformer::JsxOptions::disable()
+                    } else {
+                        return Err(format!("Invalid jsx option: `{s}`."));
+                    }
+                }
+                Some(Either::B(options)) => oxc::transformer::JsxOptions::from(options),
+                None => oxc::transformer::JsxOptions::enable(),
+            },
             env,
             helper_loader: options
                 .helpers

napi/transform/test/transform.test.ts

@@ -140,6 +140,31 @@ import bar = require('bar')
   });
 });
 
+describe('jsx', () => {
+  const code = `const foo: Foo = <div/>`;
+
+  it('enables jsx transform by default', () => {
+    const ret = transform('test.tsx', code);
+    expect(ret.code).toEqual('import { jsx as _jsx } from "react/jsx-runtime";\nconst foo = _jsx("div", {});\n');
+  });
+
+  it('configures jsx', () => {
+    const ret = transform('test.tsx', code, {
+      jsx: {
+        importSource: 'xxx',
+      },
+    });
+    expect(ret.code).toEqual('import { jsx as _jsx } from "xxx/jsx-runtime";\nconst foo = _jsx("div", {});\n');
+  });
+
+  it('can preserve jsx transform', () => {
+    const ret = transform('test.tsx', code, {
+      jsx: 'preserve',
+    });
+    expect(ret.code).toEqual('const foo = <div />;\n');
+  });
+});
+
 describe('react refresh plugin', () => {
   const code = `import { useState } from "react";
   export const App = () => {