摘要：
1.新建一个address.js的文件 2.文件内const citys = { "北京市": ["东城区","西城区","崇文区","宣武区","朝阳区","海淀区","丰台区","石景山区","房山区","通州区","顺义区","门头沟区","昌平区","大兴区", 阅读全文
摘要：
export default { watch:{ showArea(val,_val){ console.log('showArea的新值'+val+'showArea的旧值'+_val) } }, } 阅读全文