Support named imports for json & toml files at runtime (#4783)

* Support named exports in json imports

* Support named imports for `*.json` files

* Remove stale comments

* Don't export arrays as non-default

* Add test for default exports

* Don't break webpack

---------

Co-authored-by: Jarred Sumner <709451+Jarred-Sumner@users.noreply.github.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/src/cache.zig b/src/cache.zig
index 4585860fa..56d91618d 100644
--- a/src/cache.zig
+++ b/src/cache.zig
@@ -294,6 +294,13 @@ pub const Json = struct {
         };
     }
     pub fn parseJSON(cache: *@This(), log: *logger.Log, source: logger.Source, allocator: std.mem.Allocator) anyerror!?js_ast.Expr {
+        // tsconfig.* and jsconfig.* files are JSON files, but they are not valid JSON files.
+        // They are JSON files with comments and trailing commas.
+        // Sometimes tooling expects this to work.
+        if (source.path.isJSONCFile()) {
+            return try parse(cache, log, source, allocator, json_parser.ParseTSConfig);
+        }
+
         return try parse(cache, log, source, allocator, json_parser.ParseJSON);
     }