bug: IonIcons not loading after parcel build

Current Behavior

IonIcons not loading after parcel build

Expected Behavior

Icons should load

I am using ionicons for my html. It is working fine with live server. I tried to build with parcel and now they are not loading. icons are loading in network tab but not showing up in build. Please advise. Assume body tag enclosed for html

live server

parcel build

console is giving this error : Uncaught SyntaxError: Cannot use import statement outside a module (at ionicons.esm.js:1:1)

sample code