Web Components is a technology platform that combines different technologies to allow developers to create customized and reusable HTML elements to be integrated into pages, sites and web apps.
Web Components v1 APIs have spread as standard among different browsers and are supported in Chrome, Safari, Firefox and, with the next generation, Edge: these are already used in millions of sites and even more
The Web Components v0 APIs were supported only by Chrome.
For this reason, and in order to ensure the interoperability of the code and applications, Google announced at the end of last year that these draft APIs were obsolete and had scheduled their removal from Chrome from version 73.
However, evidently since still very widespread, Google recently announced that developers have taken longer to migration, and therefore the APIs have not yet been removed from Chrome.
Google also set the new deadline: Web Components v0 draft APIs are now scheduled for removal in Chrome 80, i.e. around February 2020.
Web developers, meanwhile, must organize themselves for migration.
In addition to giving the new timing, on the web developer blog, in the post accessible to this link, Google also offers suggestions and tools to successfully make the transition.
The page contains instructions and advice on how to test your site with the V0 APIs disabled to check how it works and how to disable these APIs, how to install and use the V0 Web Components polyfills, how to verify which version is in use on
This is therefore a reading which represents a first essential step in migration, while in the long term the objective of course can only be to upgrade the latest versions of the APIs.