isolated-web-app-utilities

This was recently not blocked on Chromium Developer Build and Chrome-For-Testing when called from DevTools console and Snippets

var iwa = open("isolated-app://<IWA_ID>");

That capability is now blocked, see window.open("isolated-app://") is blocked

This is a side effect of crrev.com/c/5466063, but is the intended behavior.

...

This repository provides capabilities to open isolated-app: URL's from arbitrary Web pages, including chrome:// and chrome-extension: URL's using chrome.windows.create() called by different programmatic means.

Open isolated-app: window from Web pages, chrome:, chrome-extension: URL's

So far opening IWA windows including the following approaches that discretely work:

• Handle web_accessible_resources iframe request
• Handle fetch() request - from/to the current Web page, excluding chrome:.
• Handle document.title update.
• Get chrome://web-app-internals JSON to filter IWA by !name and get start_url. Inject extension ID into all Web pages for web_accessible_resources request. Get injected extension ID in Web page, delete private origin file.
• Network request including name of IWA or other string in URL.

Utilities

AFAIK no extension or other API exists to get installed Isolated Web App details programmatically. getWebAppInternalsDetails() in background.js gets installed Isolated Web App details from the JSON in chrome://web-app-internals.

Installation

Fetch the GitHub repository and install the unpacked extension as normal on chrome://extensions in Developer mode.

Usage

Substitute the names of your Isolated Web Apps accordingly. Tested in DevTools console and Snippets on Chromium Version 126.0.6477.0 (Developer Build) (64-bit).

document.title

function setTitle(data) {
  const title = document.title;
  document.title = title + data;
  document.title = title;
}

setTitle(`?name=TCPServerSocket`);

IWA window launched in tabs.onUpdated event handler.

web_accessible_resources request

Using web_accessible_resource and a global function injected into the tab with dynamic content scripts appends an iframe with src set to a chrome-extension: URL to the current document which makes a request that is intercepted by onfetch event handler in MV3 ServiceWorker

const params = new URLSearchParams();
params.set("sdp", btoa(local.localDescription.sdp));
params.set("name", "Signed Web Bundle in Isolated Web App");
openIsolatedWebApp(`?${params.toString()}`);

Network request intercepted by declarativeNetRequest rules

Launch in declarativeNetRequest.onRuleMatchedDebug event handler

fetch(`?name=TCPServerSocket`);

License

Do What the Fuck You Want to Public License WTFPLv2