How the Angular Compiler Works

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The Angular Compiler (which we call ngc) is the tool used to compile Angular applications and libraries. ngc is built on the TypeScript compiler (called tsc) and extends the process of compiling TypeScript code to add additional code generation related to Angular’s capabilities.

Angular’s compiler serves as a bridge between developer experience and run time performance: Angular users author applications against an ergonomic, decorator-based API, and ngc translates this code into more efficient runtime instructions.

For example, a basic Angular component may look something like this:

After compilation by ngc, this component instead looks like:

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Get the full details here: https://blog.angular.io/how-the-angular-compiler-works-42111f9d2549?source=rss----447683c3d9a3---4