babel degradation for pngjs/browser faild

[sxharl]

My browser project requires syntactic compatibility to es5，when I use babel to degradation for pngjs/browser faild：

[lukeapage]

I'm sorry, but no idea what the problem is, how to fix it.

[EvanHahn]

I wrote a script to try to see if anything in browser.js required ES6+. As of 432b390 (which is when I assume this issue was opened), it's mostly usages of let and a default argument in skipRescale. None of this seems related to the error @sxharl is seeing.

I would guess this problem will go away if you update your Babel dependencies.

Hope this helps!