Replace pdfjs-dist build with legacy ES5 version

[njleonzhang]

react-pdf supports es5 itself, and its dependency pdfjs-dist supports es5 through dist/es5 folder. for entire supporting es5, react-pdf should require files in pdfjs-dist/dist/es5.
if we don't fix this issue, all users who depend on react-pdf have to analyze code of react-pdf, and find pdfjs-dist causes es5 incompatibility, then add pdfjs-dist babel transpiling config in their bundle tool(webpack) config. it don't make sense.

[wojtekmaj]

What is the issue we're trying to solve here? Does it crash on any of the supported browsers? Please raise an issue first so we can reproduce and discuss.

[njleonzhang]

What is the issue we're trying to solve here? Does it crash on any of the supported browsers? Please raise an issue first so we can reproduce and discuss.

Sorry, I have not found the browser list react-pdf supports. According to the document, I can know IE is not supported in v5.

// https://unpkg.com/[email protected]/dist/umd/entry.js
...
var pdfjs = _interopRequireWildcard(require("pdfjs-dist"));
...

react-pdf import pdfjs-dist in build code, this cause projects which use react-pdf import pdfjs-dist indirectly. react-pdf is es5 compatible, but pdfjs-dist is not by default.

This causes the projects which use react-pdf crash in browsers that do not support es6, and the users can be confused util they find the dependency relationship: user's project -> react-pdf -> pdfjs-dist.

[0ex-d]

@njleonzhang Have you been able to create an issue and link it to this PR?

[njleonzhang]

@mrbaguvix why we need a issue, it's the process for pr merging?

[wojtekmaj]

Please remove.

[njleonzhang]

done @wojtekmaj

[yordis]

Any idea when it could be release?

[njleonzhang]

any plan to merge and release?

[wojtekmaj]

As of pdfjs-dist 2.9.359 es5 directory is gone. There is legacy directory though.

Not sure how to proceed, as we should really be using non-legacy code here. Perhaps a workaround based on webpack alias might be of any help.

[njleonzhang]

ORZ!! The breaking change is released with a minor version?

[wojtekmaj]

Lol, that's classic PDF.js. Their versions do not follow semver at all. That's the very reason we have pdfjs-dist(and only pdfjs-dist) version locked.

[chinnick967]

I'm having this issue #808 in our project and wanted to see when this PR will be merged and released. Thanks!

[wojtekmaj]

Need to rebase off newest main and change paths to from /es5 to /legacy

[andredantasrocha]

Hi guys, any idea when this is gonna be released? we are facing a similar issue in our project

[wojtekmaj]

It can't be merged before the fixes are made.

[grumpyolddev]

@njleonzhang any idea when you can get this fix done on the PR? Thank you!

Need to rebase off newest main and change paths to from /es5 to /legacy

[njleonzhang]

I'v changed the path from /es5 to /legacy, but haven't tested yet.

Updated PR

[andredantasrocha]

@njleonzhang Thanks for the changes!!! can't wait to use the new code after the PR is merged :)

[wojtekmaj]

Thanks!

[andredantasrocha]

Amazing! Thanks guys!