QwikDev/partytown v0.15.0

on GitHub

Minor Changes

• ✨ mainElementProperties config: properties a worker script sets on DOM elements (such as a function an iframe's inline onload calls) are also set on the real element, a function as a main thread function calling back into the worker. (by @Varixo in #776)

Patch Changes

• 🐞🩹 fetch(request) with a Request object keeps its method, headers, body and credentials instead of sending a GET to its URL (prebid's bid requests). (by @Varixo in #782)

• 🐞🩹 postMessage on any iframe's window from the worker goes through its iframe element, also for about:blank frames the main thread has no partytown window for. (by @Varixo in #779)

• 🐞🩹 href of <link> and <base> elements is read and set on the main thread again, so a stylesheet a worker script adds with link.href = url loads; the no-op href every node has (for scripts walking up the tree) hid it. (by @Varixo in #780)

• 🐞🩹 scripts loaded on the main thread via loadScriptsOnMainThread now fire the load/error handlers registered on them in the worker (onload, onerror, addEventListener), so loaders that wait for them (e.g. gtag's Google Ads viewthroughconversion) complete (by @thegauravthakur in #771)

• 🐞🩹 a worker message listener can reply through the MessagePorts sent with the message (event.ports[0].postMessage), e.g. an ad library answering its creative's channel. (by @Varixo in #781)

• 🐞🩹 in a worker message listener, event.source of a message from one of the page's iframes is that iframe's window, so replies through event.source.postMessage reach it (e.g. a consent tool answering an ad's __tcfapi call). (by @Varixo in #779)

• 🐞🩹 worker scripts can talk to a cross-origin iframe the browser loaded itself (no CORS): iframe.contentWindow.postMessage reaches the frame, and the frame's reply to event.source reaches the page's message listeners instead of stopping at the partytown sandbox (e.g. a consent tool's consent store). (by @Varixo in #779)

• 🐞🩹 window properties whose class partytown does not emulate, such as caches and scheduler, return the worker's own object instead of throwing "Illegal constructor". (by @Varixo in #778)

• 🐞🩹 worker nodes get only the members every Node has: elements no longer inherit Text members such as splitText, which made libraries that detect text nodes by it (preact) treat elements as text nodes. (by @Varixo in #777)

• 🐞🩹 don't read partytown scripts before the window's environment has been sent to the worker. Scripts added during page load (e.g. by streaming SSR, picked up by the MutationObserver) or a ptupdate before load were sent to a worker with no environment for the window, failed, and were never run again (by @thegauravthakur in #767)

• 🐞🩹 tabs that start Partytown in the same millisecond, e.g. waiting for the same service worker to activate, get different tab ids, so the service worker no longer sends one tab's requests to the other tab ("Error finding instance"). (by @gioboa in #783)

• 🐞🩹 window.eval(code) in a partytown script runs the code in the window's scope, like the script itself, instead of the worker's global scope where window, document and the page's globals are not defined (ad libraries run downloaded tags this way). (by @Varixo in #774)

• 🐞🩹 define CSS in the web worker: CSS.escape() runs in the worker, and every other member (CSS.supports(), CSS.registerProperty(), …) is forwarded to the main thread. Scripts like gtag that call CSS.escape() no longer throw (by @thegauravthakur in #773)