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'Set' is undefined (API v 4.3, Internet Explorer only)

Question asked by TRRP on Jun 9, 2017
Latest reply on Jun 15, 2017 by TSolow-esristaff

My map application is working beautifully in Chrome and FireFox.  But when I try it in Internet Explorer (v11), the api is looking like there is a glitch.  Nothing loads and my console shows this error:

SCRIPT5009: 'Set' is undefined

File: 4.3, Line: 18, Column: 307

Clicking to view that location in the debugger shows the cursor at the beginning of a throw statement within:

 

d.result=void 0===c&&d.cjs?d.cjs.exports:c;ra(d)}return d.result},ya=0,G=function(d){try{ya++,d()}catch(hb){throw hb;}finally{ya--}pa()&&D("idle",[])},

No errors or warnings are present to show possible issues arising from my own javascript coding.  Any suggestions on how to get past this?  Thanks!

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