Framing fails in IE11 and Edge with "Invalid calling object"

[AlexeyMz]

In IE11 framing fails at setImmediate() call, probably due to an Internet Explorer-specific bug which requires setImmediate() to be called only on window context.

There is already a check related to this issue for IE10 but it doesn't work on IE11 because it defines setImmediate function:
https://github.com/digitalbazaar/jsonld.js/blob/master/lib/util.js#L37

EDIT: It also fails in Edge for the same reason.

[aljones15]

thanks for this one. if the issue just consists of adding window to setImmediate you could probably just submit a PR for it.

[AlexeyMz]

Hi @aljones15, thanks for a quick reply.

I tried to replace _setImmediate-related lines here:
https://github.com/digitalbazaar/jsonld.js/blob/master/lib/util.js#L33
with this:

let _setImmediate = typeof setImmediate === 'function' && setImmediate;
try {
  _setImmediate(() => {/* nothing */});
} catch (e) {
  // prevent "Invalid calling object" error in IE and Edge
  _setImmediate = fn => setImmediate(fn);
}

And this change fixes the issue in Edge. Unfortunately it still fails in IE, now with this error:

Unhandled promise rejection
SyntaxError: Expected ')'
   at ./node_modules/rdf-canonize/lib/index.js (eval code:2135:1)
   at __webpack_require__ (eval code:25:12)
   at Anonymous function (eval code:46:1)
   at eval code (eval code:1:29)
   at ./lib/jsonld.js (eval code:294:1)
   at __webpack_require__ (eval code:25:12)
   at eval code (eval code:9:1)
   at Anonymous function (eval code:2180:1)
   at __webpack_require__ (eval code:25:12)
   at Anonymous function (eval code:89:11)

I think the syntax error is caused by ES6+ syntax in rdf-canonize, e.g. async function here: https://github.com/digitalbazaar/rdf-canonize/blob/d410a2f6212073b59b8fe51acdb47de53514e66c/lib/index.js#L82

Should rdf-canonize be published in trinspiled form in the NPM package?

[aljones15]

Have you tried a polyfil?

https://github.com/YuzuJS/setImmediate
That's one of several.

I'm a bit surprised we don't use one. Thanks for the update.

[AlexeyMz]

It will probably work with polyfill in Edge but at the same time won't solve syntax error from rdf-canonize in IE 🙁

[dlongley]

setImmediate has been removed from jsonld.js -- closing.

[davidlehn]

@dlongley setImmediate is still in rdf-canonize. Is there a more modern construct that would allow that to be removed? This should perhaps stay open until that is addressed.