Jonas Jenwald 6e31799948 [api-minor] Add the Babel targets-option to avoid transpiling code for unsupported browsers

Currently we simply use the Babel `preset-env` in the `legacy`-builds of the PDF.js library. This has the side-effect of transpiling the code for *very old* browsers/environments, including ones that we (since many years) no longer support which unnecessarily bloats the size of the `legacy`-builds.

For the CSS files we're only targeting *the supported browsers*, and it's thus possible to extend that to also apply to Babel.
One of the most significant changes, with this patch, is that we'll no longer polyfill `async`/`await` in the `legacy`-builds. However, this shouldn't be an issue given the browsers that we currently support in PDF.js; please refer to:
 - https://github.com/mozilla/pdf.js/wiki/Frequently-Asked-Questions#faq-support
 - https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/async_function#browser_compatibility

2022-08-19 22:19:43 +02:00

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PDF.js

PDF.js is a Portable Document Format (PDF) library that is built with HTML5. Our goal is to create a general-purpose, web standards-based platform for parsing and rendering PDFs.

This is a pre-built version of the PDF.js source code. It is automatically generated by the build scripts.

For usage with older browsers or environments, without support for modern features such as optional chaining, nullish coalescing, and private class fields/methods; please see the legacy/ folder.

See https://github.com/mozilla/pdf.js for learning and contributing.

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PDF.js

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