*️token
🚧 施工中
tokens are：
keywords (
if,else,var...)punctuators (
+,-,?,{,}...)
generating tokens
lexing stage (e.g.,
var a = 2;->var,a,=,2,;)
These tokens are the reserved word, identifiers, literals, and punctuators of the ECMAScript language.
Moreover, line terminators, although not considered to be tokens, also become part of the stream of input elements and guide the process of automatic semicolon insertion (12.9). 👉 ECMA spec
⛔ 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 .Last updated
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