🔰compile-time

JS ⟩ concepts ⟩ compile-time

the period when the source code (such as C#, Java, C, Python) is converted to the machine code (i.e. binary code).

⭐️ 重點

scopes are determined at compile-time.

• identifiers are registered to respective scope during compile-time.

• but in sloppy mode, you can cheat it at runtime. ( 👉 modify current scope at runtime❗️❗)

parameter vs. argument

• parameter(s) live in function's definition (compile-time)

• argument(s) live in call sites (runtime, may be different on each call)

🔴 主題

• statically typed - the type of a value can't be changed at runtime.

• static binding (the value of an identifier is predetermined at compile-time)

• compile-time error

👥 相關

• compilation - how JS is compiled

• compare：runtime

• scopes are determined at compile time.

📗 參考

• Baeldung ⟩ Runtime vs. Compile Time