JS get current URL, host address project root path _javascript tips

Copy Code code as follows:

Get the current URL, such as: http://localhost:8080/Tmall/index.jsp
var curwwwpath=window.document.location.href;

Get the directory after the host address, such as:/tmall/index.jsp
var pathname=window.document.location.pathname;
var pos=curwwwpath.indexof (pathName);

Get host address, such as: http://localhost:8080
var localhostpaht=curwwwpath.substring (0,pos);

Get a project name with "/", such as:/tmall
var projectname=pathname.substring (0,PATHNAME.SUBSTR (1). IndexOf ('/') +1);