Besides js implicit conversion
Their finishing a whole rules are as follows:
Date walk default toString, toString returns if the object, then the view valueOf
convert other objects, the default valueOf go, but if valueOf returns the object, then try toString
//比如示例如下:
//默认的对象隐式转换是走 valueOf
var o1 = {
valueOf: function(){
return 1;
},
toString: function(){
return 9;
}
}
console.log(o1 == 1); // true
//Date 默认走 toString
//比如 new Date("1970/01/02")
new Date("1970/01/02").toString() == "Fri Jan 02 1970 00:00:00 GMT+0800 (中国标准时间)"; //true, 默认的 toString 的内容
new Date("1970/01/02") == "Fri Jan 02 1970 00:00:00 GMT+0800 (中国标准时间)"; //true, 默认的 toString 的内容
new Date("1970/01/02").valueOf() == 57600000 // getTime的内容