js运行环境

// JavaScript 代码运行示例 // 简单计算 const a = 10; const b = 20; const sum = a + b; console.log('a + b =', sum); // 数组操作 const numbers = [1, 2, 3, 4, 5]; const doubled = numbers.map(num => num * 2); console.log('原始数组:', numbers); console.log('翻倍后:', doubled); // 对象操作 const person = { name: 'John', age: 30, greet: function() { return 'Hello, my name is ' + this.name; } }; console.log(person.greet()); // 输出结果到页面 const resultDiv = document.createElement('div'); resultDiv.textContent = '代码执行完成！查看控制台输出。'; document.body.appendChild(resultDiv);

控制台输出