Angular 2 : Just-in-Time (JiT) vs Ahead-of-Time (A

Question

I was referring this documentation and came across the compilation concept. One can use either JIT or AOT compilation. However, I found it very brief and need to know following points in details,

• Differences between those two techniques
• Recommendation about when to use what

Answer 1

JIT - Compile TypeScript just in time for executing it.

• Compiled in the browser.
• Each file compiled separately.
• No need to build after changing your code and before reloading the browser page.
• Suitable for local development.

AOT - Compile TypeScript during build phase.

• Compiled by the machine itself, via the command line (Faster).
• All code compiled together, inlining HTML/CSS in the scripts.
• No need to deploy the compiler (Half of Angular size).
• More secure, original source not disclosed.
• Suitable for production builds.