From 96712cd37849328dfa47062b32eecac2826e0acc Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Hu=C3=A1ng=20J=C3=B9nli=C3=A0ng?= <jlhwung@gmail.com>
Date: Tue, 2 Nov 2021 12:01:26 -0400
Subject: [PATCH] refactor: move JSX context to context.js

---
 packages/babel-parser/src/plugins/jsx/index.js |  6 ------
 packages/babel-parser/src/tokenizer/context.js | 18 +++++++++++++-----
 2 files changed, 13 insertions(+), 11 deletions(-)

diff --git a/packages/babel-parser/src/plugins/jsx/index.js b/packages/babel-parser/src/plugins/jsx/index.js
index 5844426cb1cb..d2ecb7306e88 100644
--- a/packages/babel-parser/src/plugins/jsx/index.js
+++ b/packages/babel-parser/src/plugins/jsx/index.js
@@ -46,12 +46,6 @@ const JsxErrors = makeErrorTemplates(
 );
 /* eslint-disable sort-keys */
 
-// Be aware that this file is always executed and not only when the plugin is enabled.
-// Therefore the contexts do always exist.
-tc.j_oTag = new TokContext("<tag");
-tc.j_cTag = new TokContext("</tag");
-tc.j_expr = new TokContext("<tag>...</tag>", true);
-
 function isFragment(object: ?N.JSXElement): boolean {
   return object
     ? object.type === "JSXOpeningFragment" ||
diff --git a/packages/babel-parser/src/tokenizer/context.js b/packages/babel-parser/src/tokenizer/context.js
index ebf4793afc33..6b985901814b 100644
--- a/packages/babel-parser/src/tokenizer/context.js
+++ b/packages/babel-parser/src/tokenizer/context.js
@@ -1,7 +1,7 @@
 // @flow
 
-// The token context is used to track whether the apostrophe "`"
-// starts or ends a string template
+// The token context is used in JSX plugin to track
+// jsx tag / jsx text / normal JavaScript expression
 
 export class TokContext {
   constructor(token: string, preserveSpace?: boolean) {
@@ -13,9 +13,17 @@ export class TokContext {
   preserveSpace: boolean;
 }
 
-export const types: {
+const types: {
   [key: string]: TokContext,
 } = {
-  brace: new TokContext("{"),
-  template: new TokContext("`", true),
+  brace: new TokContext("{"), // normal JavaScript expression
+  j_oTag: new TokContext("<tag"), // JSX openning tag
+  j_cTag: new TokContext("</tag"), // JSX closing tag
+  j_expr: new TokContext("<tag>...</tag>", true), // JSX expressions
 };
+
+if (!process.env.BABEL_8_BREAKING) {
+  types.template = new TokContext("`", true);
+}
+
+export { types };