pollyfill for webkit

src/webpage/utils/pollyfills.ts

@@ -54,3 +54,12 @@ if ("Iterator" in globalThis) {
 } else {
 	defineItter("".matchAll(/6/g).constructor as typeof Iterator);
 }
+
+ReadableStream.prototype[Symbol.asyncIterator] = async function* () {
+	const reader = this.getReader();
+	while (true) {
+		const v = await reader.read();
+		yield v.value;
+		if (v.done) return undefined;
+	}
+};