🔰JS is compiled

JavaScript is a compiled language

JS ⟩ concepts ⟩ compiler ⟩ JS is compiled

JavaScript code is compiled first, and then execute.

💈範例

⛔ SyntaxError: unexpected token "xxx"

• replit：JS is a compiled language

var greeting = "Hello";
console.log(greeting);   // ⭐️ this line doesn't have a chance to run❗ 

greeting = ."Hi";        // ⭐️ error occurred in the "tokenizing" stage
//         ↑             //    of compilation❗
//         ↑
// ⛔ SyntaxError: unexpected token .

📗 參考

• YDKJS: Scope & Closures (v.2) ⟩ Ch. 1: What's the Scope?