input标签类型为date时，从数据库读取数据不回显

• 原因：input标签类型为date时，date的格式为"yyyy-MM-dd"，但是使用常规的js方法获取时间时为一位数字，格式不正确，所以数据无法回显

//这种方法获取的数据为1998-7-1
var birthday = new Date(response.data.birthday);
var year = birthday.getFullYear();
var month = birthday.getMonth();
var date = birthday.getDate();
this.driver.birthday = year+'-'+month+'-'+day;

• 解决方案：判断月份和日期的值是否小于10，小于则拼接"0"

var birthday = new Date(response.data.birthday);
var year = birthday.getFullYear();
var month = birthday.getMonth();
if(month<10){
	month = "0"+month;
}
var date = birthday.getDate();
if(date<10){
	date = "0"+date;
}
this.driver.birthday = year+'-'+month+'-'+date;