get it nearly working

grammar.js

@@ -31,19 +31,43 @@ module.exports = grammar({
   ],
 
   reserved: {
+    // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Lexical_grammar#reserved_words
     global: $ => [
+      'break',
+      'case',
+      'catch',
+      'class',
       'const',
+      'continue',
+      'debugger',
+      'default',
+      'delete',
       'do',
       'else',
+      'export',
+      'extends',
+      'false',
       'finally',
       'for',
       'function',
       'if',
-      'let',
+      'import',
+      'in',
+      'instanceof',
+      'new',
+      'null',
       'return',
+      'super',
+      'switch',
+      'this',
       'throw',
+      'true',
+      'try',
+      'typeof',
       'var',
+      'void',
       'while',
+      'with',
     ],
     properties: $ => [],
   },
@@ -62,7 +86,6 @@ module.exports = grammar({
     $._expressions,
     $._semicolon,
     $._identifier,
-    $._reserved_identifier,
     $._jsx_attribute,
     $._jsx_element_name,
     $._jsx_child,
@@ -108,9 +131,6 @@ module.exports = grammar({
 
   conflicts: $ => [
     [$.primary_expression, $._property_name],
-    [$.primary_expression, $._property_name, $.arrow_function],
-    [$.primary_expression, $.arrow_function],
-    [$.primary_expression, $.method_definition],
     [$.primary_expression, $.rest_pattern],
     [$.primary_expression, $.pattern],
     [$.primary_expression, $._for_header],
@@ -122,7 +142,6 @@ module.exports = grammar({
     [$.labeled_statement, $._property_name],
     [$.computed_property_name, $.array],
     [$.binary_expression, $._initializer],
-    [$.class_static_block, $._property_name],
   ],
 
   word: $ => $.identifier,
@@ -191,6 +210,7 @@ module.exports = grammar({
     _module_export_name: $ => choice(
       $.identifier,
       $.string,
+      'default',
     ),
 
     declaration: $ => choice(
@@ -443,7 +463,7 @@ module.exports = grammar({
     empty_statement: _ => ';',
 
     labeled_statement: $ => prec.dynamic(-1, seq(
-      field('label', alias(choice($.identifier, $._reserved_identifier), $.statement_identifier)),
+      field('label', alias($.identifier, $.statement_identifier)),
       ':',
       field('body', $.statement),
     )),
@@ -515,7 +535,6 @@ module.exports = grammar({
       $.member_expression,
       $.parenthesized_expression,
       $._identifier,
-      alias($._reserved_identifier, $.identifier),
       $.this,
       $.super,
       $.number,
@@ -548,10 +567,7 @@ module.exports = grammar({
         $.pair,
         $.spread_element,
         $.method_definition,
-        alias(
-          choice($.identifier, $._reserved_identifier),
-          $.shorthand_property_identifier,
-        ),
+        alias($.identifier, $.shorthand_property_identifier),
       ))),
       '}',
     )),
@@ -562,10 +578,7 @@ module.exports = grammar({
         $.pair_pattern,
         $.rest_pattern,
         $.object_assignment_pattern,
-        alias(
-          choice($.identifier, $._reserved_identifier),
-          $.shorthand_property_identifier_pattern,
-        ),
+        alias($.identifier, $.shorthand_property_identifier_pattern),
       ))),
       '}',
     )),
@@ -579,10 +592,7 @@ module.exports = grammar({
     object_assignment_pattern: $ => seq(
       field('left', choice(
         $._destructuring_pattern,
-        alias(
-          choice($._reserved_identifier, $.identifier),
-          $.shorthand_property_identifier_pattern,
-        ),
+        alias($.identifier, $.shorthand_property_identifier_pattern),
       )),
       '=',
       field('right', $.expression),
@@ -784,7 +794,6 @@ module.exports = grammar({
       optional('async'),
       choice(
         field('parameter', choice(
-          alias($._reserved_identifier, $.identifier),
           $.identifier,
         )),
         $._call_signature,
@@ -847,7 +856,6 @@ module.exports = grammar({
       $.member_expression,
       $.subscript_expression,
       $._identifier,
-      alias($._reserved_identifier, $.identifier),
       $._destructuring_pattern,
     ),
 
@@ -860,7 +868,6 @@ module.exports = grammar({
     _augmented_assignment_lhs: $ => choice(
       $.member_expression,
       $.subscript_expression,
-      alias($._reserved_identifier, $.identifier),
       $.identifier,
       $.parenthesized_expression,
     ),
@@ -1218,10 +1225,7 @@ module.exports = grammar({
     ),
 
     _property_name: $ => reserved('properties', choice(
-      alias(choice(
-        $.identifier,
-        $._reserved_identifier,
-      ), $.property_identifier),
+      alias($.identifier, $.property_identifier),
       $.private_property_identifier,
       $.string,
       $.number,
@@ -1234,15 +1238,6 @@ module.exports = grammar({
       ']',
     ),
 
-    _reserved_identifier: _ => choice(
-      'get',
-      'set',
-      'async',
-      'static',
-      'export',
-      'let',
-    ),
-
     _semicolon: $ => choice($._automatic_semicolon, ';'),
   },
 });