问题
I have an angular-cli application and i use Angular IMask Plugin. Angular IMask Plugin wraps vanila imaskjs which has "package.module" in es2015 format alongside with "package.main" in es5 umd format. While building angular-cli takes "package.module" but does not transpile it with babel and therefore my app does not work in IE.
How can i configure angular-cli to include imaskjs to be transpiled? It could be solved in webpack like this https://github.com/uNmAnNeR/imaskjs/issues/24 But what about angular-cli? Is eject is the only solution?
Is it ok to distribute "package.module" in es2015 format for libraries or it should be in es5 as well?
来源：https://stackoverflow.com/questions/48221521/how-to-transpile-external-dependency-in-angular-cli