I have found a code on the back of the Async merch website, any

How to add form code to your website - EmailOctopus knowledge base

Adding Asynchronous Processing to ASP.NET Core Razor Pages

What is Google Tag Manager & How Does It Work?

Async Await in Node.js - How to Master it? - RisingStack Engineering

Mailchimp Subscriber Popup

Synchronous and asynchronous input validation with ag-Grid

Third-Party Scripts: How to Optimize [+Easier Solutions]

Understanding Async, Avoiding Deadlocks in C#, by Eke Péter, Rubrikk Group

How to auto-paginate a DynamoDB Scan using an async generator - Peter Coles