embed.jsをサーバーから提供

packages/backend/assets/embed.js

@@ -0,0 +1,31 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: MIT
+ */
+//@ts-check
+(() => {
+	/** @type {NodeListOf<HTMLIFrameElement>} */
+	const els = document.querySelectorAll('iframe[data-misskey-embed-id]');
+
+	window.addEventListener('message', function (event) {
+		els.forEach((el) => {
+			if (event.source !== el.contentWindow) {
+				return;
+			}
+
+			const id = el.dataset.misskeyEmbedId;
+
+			if (event.data.type === 'misskey:embed:ready') {
+				el.contentWindow?.postMessage({
+					type: 'misskey:embedParent:registerIframeId',
+					payload: {
+						iframeId: id,
+					}
+				}, '*');
+			}
+			if (event.data.type === 'misskey:embed:changeHeight' && event.data.iframeId === id) {
+				el.style.height = event.data.payload.height + 'px';
+			}
+		});
+	});
+})();