const rawTitle = "  js 核心练习  ";
const tags = ["变量", "条件", "函数"];

const cleanTitle = rawTitle.trim();
const upperTitle = cleanTitle.toUpperCase();
const hasJS = upperTitle.includes("JS");
const tagLine = tags.join("、");

console.log("清洗后标题：", cleanTitle);
console.log("大写标题：", upperTitle);
console.log("是否包含 JS：", hasJS);
console.log("标签列表：", tagLine);