Steps to Reproduce

compare the typescript compile results
e.g.
web/js/zk/ext/jquery.js vs web/js/zk/ext/jquery.src.js
or
web/js/zul/Widget.js vs web/js/zul/Widget.src.js

... several more

Current Result

the minified production version contains additional (repeated) polyfill code
starting with:
var $jscomp=$jscomp||{};$jscomp.scope={};$jscomp.checkStringArgs=function(g,h,e)...

This extra code doesn't exist in the NON minified debug versions ... so it seems unnecessary, especially it's unexpected to add code during minification.

Expected Result

No additional repeated code in minified versions.
Only one definition of required polyfilled functions.

Debug Information

This additional code also conflicts with external JS libraries such as https://materializecss.com/ making an integration seem to work in debug mode but then fail during production (IE11 which actually runs the code)

Workaround