Add window.location to body class
I am trying to put together a smooth scrolling nav that as you are scrolling the entire header encompassing the menu changes background colors to match the defined color of that section. I am using Foundation 6 with the magellan feature for my nav.
I am trying to get my JS to get the current URL and add a class to the body that is the current URL.
var current_location = window.location.href.split('/');
var page = current_location[current_location.length - 1];
This gets me my URL hash (ie: #section2, #section3). I need to watch that as it changes on scroll of the page and add those to the body class while removing the previous one after you leave that section.
假设你有一些机制/小部件，无论你何时滚动你的页面，都会改变hash 。正如@Barmar所建议的，你可以尝试下面的代码：
var oldHashValue = ""; //defining the global variable to store old hash value class
$(function() {
// Bind an event to window.onhashchange that, when the hash changes, gets the
// hash and adds it as a class to <body> tag.
$(window).on('hashchange', function() {
var hash = location.hash;
//remove the previously added class from <body> only if its not a blank string
if($.trim(oldHashValue).length > 0)
{
$("body").removeClass(oldHashValue);
}
oldHashValue = hash.replace( /^#/, "" ); //set the variable value
if($.trim(oldHashValue).length > 0)
{
//add the class to body element
$("body").addClass(oldHashValue);
}
});
// Since the event is only triggered when the hash changes, we need to trigger
// the event now, to handle the hash the page may have loaded with.
$(window).trigger("hashchange");
});
想了解一下这个方法，想把它发布在这里以供参考：
$(document).scroll(function () {
var headerHeight = $('#header').height() + $('.bottom-header').height() - 4;
var x = $(this).scrollTop(),
section1 = $('#section1'),
section2 = $('#section2'),
section3 = $('#section3'),
section4 = $('#section4');
section5 = $('#section51-a');
if (x >= section1.offset().top && x < (section1.offset().top + section1.height())) {
$('.top-header').css("background-color", "#cc00cc");
}
if (x >= (section2.offset().top - headerHeight) && x < (section2.offset().top + section2.height())) {
$('.top-header').css("background-color", "#009999");
}
if (x >= (section3.offset().top - headerHeight) && x < (section3.offset().top + section3.height())) {
$('.top-header').css("background-color", "#ea148c");
}
if (x >= (section4.offset().top - headerHeight) && x < (section4.offset().top + section4.height())) {
$('.top-header').css("background-color", "#999900");
}
if (x >= (section5.offset().top - headerHeight) && x < (section5.offset().top + section5.height())) {
$('.top-header').css("background-color", "#0066cc");
}
});
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