Set charset=utf-8 for better consistentcy

3 files changed, 14 insertions, 6 deletions

diff --git a/integration/bunjs-only-snippets/fetch.test.js b/integration/bunjs-only-snippets/fetch.test.js
index 87cd5414f..b1ab57366 100644
--- a/integration/bunjs-only-snippets/fetch.test.js
+++ b/integration/bunjs-only-snippets/fetch.test.js
@@ -280,13 +280,17 @@ describe("Response", () => {
     it("sets the content-type header", () => {
       let response = Response.json("hello");
       expect(response.type).toBe("basic");
-      expect(response.headers.get("content-type")).toBe("application/json");
+      expect(response.headers.get("content-type")).toBe(
+        "application/json;charset=utf-8"
+      );
       expect(response.status).toBe(200);
     });
     it("supports number status code", () => {
       let response = Response.json("hello", 407);
       expect(response.type).toBe("basic");
-      expect(response.headers.get("content-type")).toBe("application/json");
+      expect(response.headers.get("content-type")).toBe(
+        "application/json;charset=utf-8"
+      );
       expect(response.status).toBe(407);
     });
     it("overrides the content-type header", () => {
@@ -296,7 +300,9 @@ describe("Response", () => {
         },
       });
       expect(response.type).toBe("basic");
-      expect(response.headers.get("content-type")).toBe("application/json");
+      expect(response.headers.get("content-type")).toBe(
+        "application/json;charset=utf-8"
+      );
     });
     it("supports headers", () => {
       var response = Response.json("hello", {
@@ -306,7 +312,9 @@ describe("Response", () => {
         },
         statusCode: 408,
       });
-      expect(response.headers.get("content-type")).toBe("application/json");
+      expect(response.headers.get("content-type")).toBe(
+        "application/json;charset=utf-8"
+      );
       expect(response.headers.get("x-hello")).toBe("world");
       expect(response.status).toBe(408);
     });
diff --git a/src/http/mime_type.zig b/src/http/mime_type.zig
index 65dd367cd..dfaa8f7e9 100644
--- a/src/http/mime_type.zig
+++ b/src/http/mime_type.zig
@@ -63,7 +63,7 @@ pub const javascript = MimeType.initComptime("text/javascript;charset=utf-8", .j
 pub const ico = MimeType.initComptime("image/vnd.microsoft.icon", .image);
 pub const html = MimeType.initComptime("text/html;charset=utf-8", .html);
 // we transpile json to javascript so that it is importable without import assertions.
-pub const json = MimeType.initComptime("application/json", .json);
+pub const json = MimeType.initComptime("application/json;charset=utf-8", .json);
 pub const transpiled_json = javascript;
 pub const text = MimeType.initComptime("text/plain;charset=utf-8", .html);
 
diff --git a/src/javascript/jsc/webcore/response.zig b/src/javascript/jsc/webcore/response.zig
index 41f08cce4..721ffc5ca 100644
--- a/src/javascript/jsc/webcore/response.zig
+++ b/src/javascript/jsc/webcore/response.zig
@@ -392,7 +392,7 @@ pub const Response = struct {
         }
 
         var headers_ref = response.getOrCreateHeaders().leak();
-        headers_ref.putHeaderNormalized("content-type", "application/json", false);
+        headers_ref.putHeaderNormalized("content-type", MimeType.json.value, false);
         var ptr = response.allocator.create(Response) catch unreachable;
         ptr.* = response;