javascript antlr4 and IE11 acejs webworker.

[Gangadhar Balikai]

Hi, 

I have packed antlr and my language parser into single file using webpack. 

ace Syntax check works as expected on Chrome and Firefox via web worker (using importScripts and window.location).  

Thx for documentation on link https://github.com/antlr/antlr4/blob/master/doc/ace-javascript-target.md

But importScripts in IE (version 11 in my case) seems bit tricky. Turns out ace web worker gets loaded with origin as "blob" and fails to download antlr4 script with "Access denied" exception from my web domain. 

I spent some time thinking relative path might fix the issue, but problem seems to be more complex then i thought. 

Please let me know if someone got solution for above issue i have?

Thanks, Gangadhar