How can I get the name of an html page in Javascript?

var path = window.location.pathname;
var page = path.split("/").pop();
console.log( page );

Current page: It's possible to do even shorter. This single line sound more elegant to find the current page's file name:

var fileName = location.href.split("/").slice(-1); 

or...

var fileName = location.pathname.split("/").slice(-1)

This is cool to customize nav box's link, so the link toward the current is enlighten by a CSS class.

JS:

$('.menu a').each(function() {
    if ($(this).attr('href') == location.href.split("/").slice(-1)){ $(this).addClass('curent_page'); }
});

CSS:

a.current_page { font-size: 2em; color: red; }

Try this

location.pathname.substring(location.pathname.lastIndexOf("/") + 1);

location.pathname gives the part (domain not included) of the page URL. To get only the filename you have to extract it using the substring method.