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Polyfill structuredClone with core-js (PR 13948 follow-up)

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This allows us to remove the manually implemented `structuredClone` polyfill, thus reducing the maintenance burden for the `LoopbackPort` class; refer to https://github.com/zloirock/core-js#structuredclone

*Please note:* While `structuredClone` support landed already in Firefox 94, Google Chrome only added it in version 98 (currently in Beta). However, given that the `LoopbackPort` will only be used together with *fake workers* in browsers this shouldn't be too much of a problem.[1]
For Node.js environments, where *fake workers* are unfortunately necessary, using a `legacy/`-build is already required which thus guarantees that the `structuredClone` polyfill is available.

Also, the patch updates core-js to the latest version since that one includes `structuredClone` improvements; please see https://github.com/zloirock/core-js/releases/tag/v3.20.3

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[1] Given that we only support browsers with proper worker support, if *fake workers* are being used that essentially indicates a configuration problem/error.
This commit is contained in:
Jonas Jenwald 2022-01-18 13:07:39 +01:00
parent 2fcd07f400
commit 7cc761a8c0
5 changed files with 47 additions and 98 deletions
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.eslintrc
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@ -28,6 +28,7 @@
"globals": {
"PDFJSDev": false,
"exports": false,
"structuredClone": false,
"SystemJS": false,
},