⚖️lexical environment vs. scope

JS ⟩ concepts ⟩ scope ⟩ lexical environment vs. scope

• (global/module/function/block) scope

  • is determined at compile-time.

  • is determined once and for all.

• lexical environment

  • is created at runtime, every time a scope is entered❗

  • is repeatedly created/destoyed each time enters/leaves a scope.

👥 相關

• scope

• lexical environment

• scope chain

• execution context