Web Pixel Service Worker can't read cookie

[daveluke]

Hello.

I have code that in a Web Pixel service worker that sets a cookie from a URL parameter. It should then read that cookie on page_view and checkout_completed, and send it to my server.

It seems that I can set the cookie, but reading the cookie still returns undefined.

Can someone advise? See code below.

Note: It's also been a nightmare getting the Web Pixel code to update. I literally have to create a new development store each time. If anyone can assist in that area, I would be appreciative. Thanks!

import {register} from "@shopify/web-pixels-extension";

register(({ configuration, analytics, browser, init }) => {

	const { window } = init.context;

	const bcParams = new URLSearchParams(window.location.search);

	let bcEntries = Object.fromEntries(bcParams.entries());

	var bcAffiliateId = bcEntries.bc_aff_id;

	console.log('2.11.1', bcAffiliateId);

	browser.cookie.set('bc_id', bcAffiliateId);

    

    analytics.subscribe('page_viewed', async(event) => {

		const proposalId = await browser.cookie.get('bc_id');

		console.log('from cookie', proposalId);

		const jsonString = JSON.stringify({proposal_id: proposalId, action: 'view'});

		console.log(jsonString);

		if (proposalId) {
			browser.sendBeacon('https://xxxxx/api/affiliate', jsonString);
		}
 
    });

    analytics.subscribe('checkout_completed', async(event) => {

    	const orderId = event.data.checkout.order.id;

    	const proposalId = await browser.cookie.get('bc_id');

    	const jsonString = JSON.stringify({proposal_id: proposalId, order_id: orderId, action: 'order'});

		if (proposalId) {
			browser.sendBeacon('https://xxxxx/api/affiliate', jsonString);
		}

    });
});

[FabianSchulcz]

Hi @daveluke 
I think you want to set the cookie in one event and read in another.

Right now you are writing outside of any event scope. In general I believe it should also work like this - if all code is executed on all pages. But I do not know. We are successfully writing cookies (incl. expire, path and domain) in page_viewed and reading checkout_completed.
Hope this helps