From 76aa91f83cf37a11aa55feba40d6f73819fc811d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Donny/=EA=B0=95=EB=8F=99=EC=9C=A4?= <kdy1997.dev@gmail.com>
Date: Mon, 19 Jun 2023 12:18:19 +0900
Subject: [PATCH] fix(es/typescript): Don't panic of `@jsxFrag null` (#7540)

**Related issue:**

 - Closes #7539.
---
 crates/swc/tests/fixture/issues-7xxx/7539/input/.swcrc   | 9 +++++++++
 crates/swc/tests/fixture/issues-7xxx/7539/input/index.js | 3 +++
 .../swc/tests/fixture/issues-7xxx/7539/output/index.js   | 1 +
 crates/swc_ecma_transforms_typescript/src/strip.rs       | 1 +
 .../tests/fixture/issue-7539/input.tsx                   | 3 +++
 .../tests/fixture/issue-7539/output.js                   | 1 +
 6 files changed, 18 insertions(+)
 create mode 100644 crates/swc/tests/fixture/issues-7xxx/7539/input/.swcrc
 create mode 100644 crates/swc/tests/fixture/issues-7xxx/7539/input/index.js
 create mode 100644 crates/swc/tests/fixture/issues-7xxx/7539/output/index.js
 create mode 100644 crates/swc_ecma_transforms_typescript/tests/fixture/issue-7539/input.tsx
 create mode 100644 crates/swc_ecma_transforms_typescript/tests/fixture/issue-7539/output.js

diff --git a/crates/swc/tests/fixture/issues-7xxx/7539/input/.swcrc b/crates/swc/tests/fixture/issues-7xxx/7539/input/.swcrc
new file mode 100644
index 000000000000..497481f1a012
--- /dev/null
+++ b/crates/swc/tests/fixture/issues-7xxx/7539/input/.swcrc
@@ -0,0 +1,9 @@
+{
+    "jsc": {
+        "parser": {
+            "syntax": "typescript",
+            "tsx": true
+        }
+    },
+    "isModule": true
+}
\ No newline at end of file
diff --git a/crates/swc/tests/fixture/issues-7xxx/7539/input/index.js b/crates/swc/tests/fixture/issues-7xxx/7539/input/index.js
new file mode 100644
index 000000000000..27ad390aca3b
--- /dev/null
+++ b/crates/swc/tests/fixture/issues-7xxx/7539/input/index.js
@@ -0,0 +1,3 @@
+/* @jsx h */
+/* @jsxFrag null */
+<></>;
\ No newline at end of file
diff --git a/crates/swc/tests/fixture/issues-7xxx/7539/output/index.js b/crates/swc/tests/fixture/issues-7xxx/7539/output/index.js
new file mode 100644
index 000000000000..2c1488f43228
--- /dev/null
+++ b/crates/swc/tests/fixture/issues-7xxx/7539/output/index.js
@@ -0,0 +1 @@
+/* @jsx h */ /* @jsxFrag null */ /*#__PURE__*/ h(null, null);
diff --git a/crates/swc_ecma_transforms_typescript/src/strip.rs b/crates/swc_ecma_transforms_typescript/src/strip.rs
index ddf48d8050f2..3118a019f399 100644
--- a/crates/swc_ecma_transforms_typescript/src/strip.rs
+++ b/crates/swc_ecma_transforms_typescript/src/strip.rs
@@ -248,6 +248,7 @@ fn id_for_jsx(e: &Expr) -> Id {
     match e {
         Expr::Ident(i) => i.to_id(),
         Expr::Member(MemberExpr { obj, .. }) => id_for_jsx(obj),
+        Expr::Lit(Lit::Null(..)) => (js_word!("null"), Default::default()),
         _ => {
             panic!("failed to determine top-level Id for jsx expression")
         }
diff --git a/crates/swc_ecma_transforms_typescript/tests/fixture/issue-7539/input.tsx b/crates/swc_ecma_transforms_typescript/tests/fixture/issue-7539/input.tsx
new file mode 100644
index 000000000000..27ad390aca3b
--- /dev/null
+++ b/crates/swc_ecma_transforms_typescript/tests/fixture/issue-7539/input.tsx
@@ -0,0 +1,3 @@
+/* @jsx h */
+/* @jsxFrag null */
+<></>;
\ No newline at end of file
diff --git a/crates/swc_ecma_transforms_typescript/tests/fixture/issue-7539/output.js b/crates/swc_ecma_transforms_typescript/tests/fixture/issue-7539/output.js
new file mode 100644
index 000000000000..d0f3e9c84a29
--- /dev/null
+++ b/crates/swc_ecma_transforms_typescript/tests/fixture/issue-7539/output.js
@@ -0,0 +1 @@
+/* @jsx h */ /* @jsxFrag null */ <></>;