fix: throw expect jsx plugin error when an idStart or > is seen

packages/babel-parser/src/parser/expression.js

@@ -1179,7 +1179,13 @@ export default class ExpressionParser extends LValParser {
       // fall through
       case tt.relational: {
         if (this.state.value === "<") {
-          throw this.expectOnePlugin(["jsx", "flow", "typescript"]);
+          const lookaheadCh = this.input.codePointAt(this.nextTokenStart());
+          if (
+            isIdentifierStart(lookaheadCh) || // Element/Type Parameter <foo>
+            lookaheadCh === charCodes.greaterThan // Fragment <>
+          ) {
+            this.expectOnePlugin(["jsx", "flow", "typescript"]);
+          }
         }
       }
       // fall through

packages/babel-parser/test/fixtures/es2015/modules/invalid-xml-comment-in-module/input.js

@@ -0,0 +1 @@
+<!--bar-->

packages/babel-parser/test/fixtures/es2015/modules/invalid-xml-comment-in-module/options.json

@@ -0,0 +1,4 @@
+{
+  "sourceType": "module",
+  "throws": "Unexpected token (1:0)"
+}

packages/babel-parser/test/fixtures/jsx/errors/_no-plugin-fragment/input.js

@@ -0,0 +1,5 @@
+function foo () {
+  return (
+    <>Hello</>
+  );
+}

packages/babel-parser/test/fixtures/jsx/errors/_no-plugin-fragment/options.json

@@ -0,0 +1,4 @@
+{
+  "throws": "This experimental syntax requires enabling one of the following parser plugin(s): 'jsx, flow, typescript' (3:4)",
+  "plugins": []
+}

packages/babel-parser/test/fixtures/jsx/errors/_no_plugin-non-BMP-identifier/input.js

@@ -0,0 +1,5 @@
+<
+  𠮷
+></
+  𠮷
+>

packages/babel-parser/test/fixtures/jsx/errors/_no_plugin-non-BMP-identifier/options.json

@@ -0,0 +1,4 @@
+{
+  "throws": "This experimental syntax requires enabling one of the following parser plugin(s): 'jsx, flow, typescript' (1:0)",
+  "plugins": []
+}

packages/babel-parser/test/fixtures/jsx/errors/html-comment-module/input.js

@@ -0,0 +1 @@
+<!--a

packages/babel-parser/test/fixtures/jsx/errors/html-comment-module/options.json

@@ -0,0 +1,5 @@
+{
+  "sourceType": "module",
+  "plugins": ["jsx", "flow"],
+  "throws": "Unexpected token (1:0)"
+}