⛔unexpected number❗️

JS ⟩ error ⟩ SyntaxError ⟩ unexpected number❗

⛔ SyntaxError：unexpected number❗

💈範例

• replit：dot notation

// object
let obj = {};

// ⭐️ dot notaton
obj.$1 = 'joe';       // ✅ valid identifier
obj.var = 'OK';       // ✅ reserved word is allowed❗

// --------------------------------------------
// obj.1 = 'bad';     // ❌ invalid identifier
//    ^^
// ⛔ SyntaxError: Unexpected number
// --------------------------------------------

✨ 範例

• dot notation (.)