Unrecognized entities give strange `undefined`

[sophiebits]

If you compile this JSX:

<CalEvent href="/events?fields=(id,summary)&key=YOUR_KEY" />

it turns into:

CalEvent( {href:"/events?fields=(id,summary)undefinedEY"} )

which seems subpar. I'd expect this to throw an error.

[VinSpee]

I concur. Ran into this issue with the google calendar API.

current workaround:

<CalEvent href="/events?fields=(id,summary)&amp;key=YOUR_KEY" />

[sophiebits]

Sorry – to be clear, that's not a workaround; you should have to write &. I opened this issue so we can provide a better error message.

[syranide]

#1514 is a fix (although not explicitly for this issue).

PS. I propose lenient parsing like browsers (my PR does that), if it doesn't match an entity it is output as-is. Means you don't have to fugly up all URLs and text for "no reason".

[RReverser]

Fixed it in facebookarchive/esprima#32 in slightly different way - just treating & without following entity as-is. (similar to @syranide's proposal)

[zpao]

Autoclosing is fun… reopening here until we update our esprima copy (via jstransform).

[syranide]

@zpao Landed in 0.12RC, close?