		@@ -14,6 +14,21 @@ 'use strict';
		parent
		} = self; // We need to store the listener, because we wrap it to do some origin checking. Ideally,
		} = self;

		const ready = () => parent.postMessage('remote-ui::ready', targetOrigin); // Listening to `readyState` in iframe, though the child iframe could probably
		// send a `postMessage` that it is ready to receive messages sooner than that.


		if (document.readyState === 'complete') {
		ready();
		} else {
		document.addEventListener('readystatechange', () => {
		if (document.readyState === 'complete') {
		ready();
		}
		});
		} // We need to store the listener, because we wrap it to do some origin checking. Ideally,
		// we’d instead store an `AbortController`, and use its signal to cancel the listeners,
		// but that isn’t widely supported.


		const listenerMap = new WeakMap();
		@@ -20,0 +35,0 @@ return {

build/cjs/adaptors/iframe-parent.js

		@@ -9,4 +9,2 @@ 'use strict';
		} = {}) {
		var _target$contentDocume;

		if (typeof window === 'undefined') {
		@@ -20,5 +18,9 @@ throw new Error(`You can only run fromIframe() in a browser context, but no window was found.`);
		const listenerMap = new WeakMap();
		const iframeLoadPromise = ((_target$contentDocume = target.contentDocument) === null \|\| _target$contentDocume === void 0 ? void 0 : _target$contentDocume.readyState) === 'complete' ? Promise.resolve() : new Promise(resolve => {
		target.addEventListener('load', () => resolve(), {
		once: true
		const iframeReadyPromise = new Promise(resolve => {
		window.addEventListener('message', event => {
		if (event.source !== target.contentWindow) return;

		if (event.data === 'remote-ui::ready') {
		resolve();
		}
		});
		@@ -28,8 +30,3 @@ });
		async postMessage(message, transfer) {
		var _target$contentDocume2;

		if (((_target$contentDocume2 = target.contentDocument) === null \|\| _target$contentDocume2 === void 0 ? void 0 : _target$contentDocume2.readyState) !== 'complete') {
		await iframeLoadPromise;
		}

		await iframeReadyPromise;
		target.contentWindow.postMessage(message, targetOrigin, transfer);
		@@ -36,0 +33,0 @@ },

package.json

		{
		"name": "@remote-ui/rpc",
		"description": "An RPC library with strong support for simulating the transfer of functions via postMessage",
		"version": "1.3.3",
		"version": "1.3.4",
		"publishConfig": {
		@@ -26,3 +26,3 @@ "access": "public"
		},
		"gitHead": "74cd41c4fe67ef9b9bb7f8c597c722b7eb848b50"
		"gitHead": "a35cf5c1e3d89949e60af9b90339c6551325396d"
		}

src/adaptors/iframe-child.ts

		@@ -12,2 +12,16 @@ import type {MessageEndpoint} from '../types';

		const ready = () => parent.postMessage('remote-ui::ready', targetOrigin);

		// Listening to `readyState` in iframe, though the child iframe could probably
		// send a `postMessage` that it is ready to receive messages sooner than that.
		if (document.readyState === 'complete') {
		ready();
		} else {
		document.addEventListener('readystatechange', () => {
		if (document.readyState === 'complete') {
		ready();
		}
		});
		}

		// We need to store the listener, because we wrap it to do some origin checking. Ideally,
		@@ -14,0 +28,0 @@ // we’d instead store an `AbortController`, and use its signal to cancel the listeners,

src/adaptors/iframe-parent.ts

		@@ -21,16 +21,14 @@ import type {MessageEndpoint} from '../types';

		const iframeLoadPromise =
		target.contentDocument?.readyState === 'complete'
		? Promise.resolve()
		: new Promise<void>((resolve) => {
		target.addEventListener('load', () => resolve(), {
		once: true,
		});
		});
		const iframeReadyPromise = new Promise<void>((resolve) => {
		window.addEventListener('message', (event) => {
		if (event.source !== target.contentWindow) return;
		if (event.data === 'remote-ui::ready') {
		resolve();
		}
		});
		});

		return {
		async postMessage(message, transfer) {
		if (target.contentDocument?.readyState !== 'complete') {
		await iframeLoadPromise;
		}
		await iframeReadyPromise;

		@@ -37,0 +35,0 @@ target.contentWindow!.postMessage(message, targetOrigin, transfer);

build/esm/adaptors/iframe-child.mjs