Google will continue to support v0 of the API in Chrome until around February 2020 to give developers more time to upgrade.
Web developers who are still using Google's early version of the Web Components API on their sites have been granted a stay of execution.
In a bid to encourage developers to move to the cross-browser Web Components v1 API, Google had been planning to remove support for the v0 API with the release of Chrome 73, in May.
But Google held off stripping out support for the API to give developers more time to upgrade, and now says it will continue supporting the v0 API until the release of Chrome 80, in around February 2020.
"Because enough developers requested more time to migrate, the APIs have not yet been removed from Chrome," writes Google's web developer team.
Google has released a series of guides for web developers who want to check if their site would be affected by the removal of support for the v0 API, including instructions for how to disable support for the v0 API to see how the site functions.
If developers aren't certain whether they're using an obsolete version of the Web Components API, then can open the DevTools Console by hitting Ctrl+Shift+J (Cmd+Shift+J on Mac) in Chrome and checking for messages starting with "[Deprecation]", which will detail the APIs whose support is due to be removed.
"The Web Components v0 draft APIs are going away. If you take one thing away from this post, make sure you test your app with the v0 APIs disabled and load the polyfills as needed," the Google team write.
Web Components are an increasingly popular way for web developers to reuse code for features like custom UIs in web pages and apps, with millions of sites using version 1 of the Web Components API.
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