How to use JS to get the current page URL information method (js get the current URL information)

The path problem in JS:

"/" This refers to the root directory
".. /"This is the parent directory

Sets or gets the file name or path specified by the object.

Alert (Window.location.pathname)

Sets or gets the entire URL as a string.

alert (WINDOW.LOCATION.HREF);

Sets or gets the port number associated with the URL.

Alert (Window.location.port)

Sets or gets the protocol portion of the URL.

Alert (Window.location.protocol)

Sets or gets the segment behind the pound sign "#" in the href attribute.

Alert (Window.location.hash)

Set or get the hostname and port numbers for the location or URL.

Alert (Window.location.host)

Sets or gets the portion of the HREF attribute that follows the question mark.

Alert (Window.location.search)

Get the value of a variable (intercept the part after the equals sign)

var url = window.location.search;
alert (url.length);
Alert (url.lastindexof (' = '));
var loc = url.substring (url.lastindexof (' = ') +1, url.length);