structuredClone

[zloirock]

structuredClone method now exposed in the HTML spec. It's not a part of ECMAScript, but it's a very useful cross-platform feature, so makes sense to add it to core-js. If someone wanna contribute something significant to core-js - it's a good chance.

[BasixKOR]

FYI, This is the algorithm used for structured clone serialization and deserialization.

And can I get a chance to implement this? Not very familar with core-js codebase but I really wanna give it a try :)

[zloirock]

@BasixKOR sure. Ask me if you will have any questions.

[petamoriken]

I made a list of Serializables and Transferables from WebIDL. I hope this helps :)

https://gist.github.com/petamoriken/3802602b8e93d89e5b4c21e36683cadb#gistcomment-3899514

[petamoriken]

The next release of Node.js (v17.0.0) will include structuredClone and DOMException.
nodejs/node#40119

I think it would be nice to add support for DOMException.
related: #938

[zloirock]

@petamoriken thanks! However, I'm not sure that the implementation of the transferable behavior is possible in most cases.

[BasixKOR]

The ongoing implementation of structuredClone uses DOMException if it's available, and fallbacks to plain Error if there isn't. I guess the support table should be updated to reflect the support status of Deno and Node.js.

And yeah as @zloirock pointed out the transferable behaviour cannot be cleanly implemented as a polyfill, so it won't have transfer argument support for now. Any suggestion for implementing it is welcome though!

[zloirock]

tc39/ecma262#2555

[zloirock]

FF implementation can't clone errors, https://bugzilla.mozilla.org/show_bug.cgi?id=1556604.

[zloirock]

whatwg/html#5749