在这例子中，可以看到两个$location实例，两个都是html5 mode，但在不同的浏览器上，所以我们可以看到两者之间的不同点。这些$location服务与两个假的“浏览器”连接。每一个input代表浏览器的地址栏。
注意，当我们输入hashbang地址到第一个“浏览器”（或者第二个？），它不会重写或重定向另外的Url，这个转换过程只会发生在page reload的时候。
<!DOCTYPE html>
<html ng-app>
<head>
<base href=""/>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<title>fake-browser</title>
<meta content="IE=edge,chrome=1" http-equiv="X-UA-Compatible">
<style type="text/css">
.ng-cloak {
display: none;
}
</style>
</head>
<body>
<div ng-non-bindable>
<div ng-controller="Html5Cntl">
<h4>Browser with History API</h4>
<div ng-address-bar browser="html5"></div><br><br>
$location.protocol() = {{$location.protocol()}}<br>
$location.host() = {{$location.host()}}<br>
$location.port() = {{$location.port()}}<br>
$location.path() = {{$location.path()}}<br>
$location.search() = {{$location.search()}}<br>
$location.hash() = {{$location.hash()}}<br>
<a href="http://www.host.com/base/first?a=b">/base/first?a=b</a> |
<a href="http://www.host.com/base/sec/ond?flag#hash">sec/ond?flag#hash</a> |
<a href="/other-base/another?search">external</a>
</div>
<div ng-controller="HashbangCntl">
<h4>Browser without History API</h4>
<div ng-address-bar browser="hashbang"></div><br><br>
$location.protocol() = {{$location.protocol()}}<br>
$location.host() = {{$location.host()}}<br>
$location.port() = {{$location.port()}}<br>
$location.path() = {{$location.path()}}<br>
$location.search() = {{$location.search()}}<br>
$location.hash() = {{$location.hash()}}<br>
<a href="http://www.host.com/base/first?a=b">/base/first?a=b</a> |
<a href="http://www.host.com/base/sec/ond?flag#hash">sec/ond?flag#hash</a> |
<a href="/other-base/another?search">external</a>
</div>
</div>
<script src="https://www.jb51.net/angular.js" type="text/javascript"></script>
<script type="text/javascript">
function FakeBrowser(initUrl, baseHref) {
this.onUrlChange = function(fn) {
this.urlChange = fn;
};
this.url = function() {
return initUrl;
};
this.defer = function(fn, delay) {
setTimeout(function() { fn(); }, delay || 0);
};
this.baseHref = function() {
return baseHref;
};
this.notifyWhenOutstandingRequests = angular.noop;
}
var browsers = {
html5: new FakeBrowser('http://www.host.com/base/path?a=b#h', '/base/index.html'),
hashbang: new FakeBrowser('http://www.host.com/base/index.html#!/path?a=b#h', '/base/index.html')
};
function Html5Cntl($scope, $location) {
$scope.$location = $location;
}
function HashbangCntl($scope, $location) {
$scope.$location = $location;
}
function initEnv(name) {
var root = angular.element(document.getElementById(name + '-mode'));
angular.bootstrap(root, [
function ($compileProvider, $locationProvider, $provide) {
debugger;
$locationProvider.html5Mode(true).hashPrefix('!');
$provide.value('$browser', browsers[name]);
$provide.value('$document', root);
$provide.value('$sniffer', {history:name == 'html5'});
$compileProvider.directive('ngAddressBar', function () {
return function (scope, elm, attrs) {
var browser = browsers[attrs.browser],
input = angular.element('<input type="text">').val(browser.url()),
delay;
input.bind('keypress keyup keydown', function () {
if (!delay) {
delay = setTimeout(fireUrlChange, 250);
}
});
browser.url = function (url) {
return input.val(url);
};
elm.append('Address: ').append(input);
function fireUrlChange() {
delay = null;
browser.urlChange(input.val());
}
};
});
}
]);
root.bind('click', function (e) {
e.stopPropagation();
});
}
initEnv('html5');
initEnv('hashbang');
</script>
</body>
</html>
五、附加说明
1. Page reload navigation
$location服务仅仅允许我们改变URl；它不允许我们重新加载页面（reload the page）。当我们需要改变URL且reload page或者跳转到其他页面时，我们需要使用低级点得API，$window.location.href。
2. Using $location outside of the scope life-cycle