[Feature Request] Built-in `deepCopy/deepClone` (based on the structured cloning algorithm)

[Jordan Harband]

You may be interested to read some previous discussions around this topic:
 - https://esdiscuss.org/topic/structured-clones
 - https://esdiscuss.org/topic/the-structured-clone-wars
 - https://esdiscuss.org/topic/object-clone-not-quite-a-proposal
 - https://esdiscuss.org/topic/object-equals-and-object-clone

On Fri, Dec 7, 2018 at 6:00 AM Harry Manchanda <harmanmanchanda182 at gmail.com>
wrote:

> Heya, I tried before to write this but seems like I wasn't subscribed. Now
> seems like I subscribed so posting it again...
>
> So here we go,
>
> I am posting this after an aftermath of a Github Issue. See =>
> https://github.com/tc39/proposals/issues/150
>
> I would like the JavaScript (ECMAScript) Spec to include built-in
> `deepCopy/deepClone` feature.
>
> Please note that based on the response at Github Issue and also
> considering that the top 3 npm packages for cloning have over 100k weekly
> downloads I am very positive on this and should be really considered.
>
> I think we have two approaches to consider for same
>
> 1. Object Oriented approach
>
> ```js
> // Object.prototype.deepCopy(), Array.prototype.deepCopy(), etc
>
> const harry = {
>   name: 'Harry Manchanda',
>   age: 25,
>   social: [
>     {
>       website: 'twitter',
>       username: '@harmanmanchanda',
>     },
>     {
>       website: 'facebook',
>       username: 'IamManchanda',
>     },
>   ],
> };
>
> const dev = harry.deepCopy();
> dev.social[1].website = 'github';
> ```
>
> 2. Functional Programming approach
>
> ```js
> // Object.deepCopy(value)
> // Value expects array, objects and primitives
>
> const harry = {
>   name: 'Harry Manchanda',
>   age: 25,
>   social: [
>     {
>       website: 'twitter',
>       username: '@harmanmanchanda',
>     },
>     {
>       website: 'facebook',
>       username: 'IamManchanda',
>     },
>   ],
> };
>
> const dev = Object.deepCopy(harry);
> dev.social[1].website = 'github';
> ```
>
>
> Reason why I think so strongly that everyone in javascript community needs
> this is this
>
> => https://gist.github.com/search?l=JavaScript&q=deepcopy
> => https://gist.github.com/search?l=JavaScript&q=deepclone
> => https://github.com/search?l=JavaScript&q=deepcopy&type=Repositories
> => https://github.com/search?l=JavaScript&q=deepclone&type=Repositories
>
>
> *Thanks,*
>
> *Harman Singh Manchanda ( Harry )*
> *Open Source Team Member - Zurb Foundation
> <https://foundation.zurb.com/get-involved/yetinauts.html>*
> _______________________________________________
> es-discuss mailing list
> es-discuss at mozilla.org
> https://mail.mozilla.org/listinfo/es-discuss
>
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