在 javascript 中常需要获取或者修改当前页面的地址
可以使用 window.location 这个对象
window.location = {
// attributes
hash: //Sets or returns the URL from the hash sign (#)
host: //Sets or returns the hostname and port number of the current URL
hostname: //Sets or returns the hostname of the current URL
href: //Sets or returns the entire URL
pathname: //Sets or returns the path of the current URL
port: //Sets or returns the port number of the current URL
protocol: //Sets or returns the protocol of the current URL
search: //Sets or returns the URL from the question mark (?)
// methods
assign(): //Loads a new document
reload(): //Reloads the current document
replace(): //Replaces the current document with a new one
}
