Описание тега angular-aot
A AOT-Compiler (Ahead of time) compiles the source code before the code is executed. Unlike the JIT-Compiler (Just in time) which compiles right when the code is executed.
The Angular Ahead-of-Time (AOT) compiler converts your Angular HTML and TypeScript code into efficient JavaScript code during the build phase before the browser downloads and runs that code.
This guide explains how to build with the AOT compiler using different compiler options and how to write Angular metadata that AOT can compile.
To find more information: