From 68343a3dff54fe60873fbc11eff5b9fefea83876 Mon Sep 17 00:00:00 2001
From: Catherine <whitequark@whitequark.org>
Date: Fri, 24 Oct 2025 09:26:54 +0000
Subject: [PATCH] Turns out a Web Worker is a type of frame (for COEP
 purposes).

---
 src/pages.go | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/src/pages.go b/src/pages.go
index cf26d18..a511fc3 100644
--- a/src/pages.go
+++ b/src/pages.go
@@ -12,6 +12,7 @@ import (
 	"net/url"
 	"os"
 	"path"
+	"slices"
 	"strconv"
 	"strings"
 	"time"
@@ -282,8 +283,12 @@ func getPage(w http.ResponseWriter, r *http.Request) error {
 		}
 
 		contentType := getMediaType(entry.GetContentType())
-		if contentType == "" || contentType == "text/html" || contentType == "application/xhtml+xml" {
-			// allow the use of multi-threading in WebAssembly
+		if slices.Contains(
+			[]string{"", "text/html", "application/xhtml+xml", "text/javascript"},
+			contentType,
+		) {
+			// allow the use of multi-threading in WebAssembly;
+			// note that a Web Worker is considered a type of frame for COEP purposes
 			w.Header().Set("Cross-Origin-Embedder-Policy", "credentialless")
 			w.Header().Set("Cross-Origin-Opener-Policy", "same-origin")
 		}