Angular 9 Tutorial For Beginners #75- Ahead of Time (AOT) Compilation

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Angular Ahead of Time (AOT)
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1. AOT - stands for Ahead of Time compilation
2. Why do we need it?
- Angular code is in TypeScript and the metadata like @component, injectable, pipes etc are not understood by browers
- we need to convert it to browser understable code
3. Angular has 2 ways to compile
- Just in Time - till Angular 8 - this used to be default
- Ahead of Time from Angular 9 onwards - AOT is deafult
4. Benefits of AOT
- Faster Redendering
- Security
- Prevents Injection attacks

[gajudone]

Great. I appreciate. I have one question why we use hostlistener events rather than using normal angular events. And why we custom directives in angular. Can you please make a video on it if possible.

[Coffee_Kaburlu]

Can you please tell me a scenario even after AOT being the default option, where we need to make JIT as an option?

[vineethkumar]

In phase2 code generation u mentioned 1 thing non-null assertion what does it mean?

[tejag]

What is the impact if we turn of AOT compiler?

[sheikhnaseem]

Hi sir can you explaine of interceptor architecture with example of line by line ?

[saikumarmogilla]

Hi sir, when we install angular 10, we get aot by default or show we install any package for this, actually I was building a project and I got a error regarding AOT, after that I searched the error in google and and I did 'npm build' and the next day no error