// 使用前最好判断一下这三个函数是否存在
process.stdout.clearLine();
process.stdout.cursorTo(0);
process.stdout.write(msg);
console.log(msg) == > process.stdout.write(msg + '\n')
// 输出区域的宽度和高度
process.stdout.on('resize', () => {
console.log('screen size has changed!');
console.log(`${process.stdout.columns}x${process.stdout.rows}`);
});