如何使用history.js捕获一次状态更改事件？
我在下面有一个示例代码，如果您单击链接，然后使用后退和前进，每个状态更改都会导致 statechange 事件上越来越多的点击。而不是我所期望的那样。
链接：
代码：
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>History start</title>
</head>
<body>
<h1>Headline</h1>
<hr>
<div id="menu">
<ul>
<li>
<a href="page-1">Page 1</a>
<div style="display:none;">
<h2>Page 1</h2>
<p>Content 1</p>
</div>
</li>
<li>
<a href="page-2">Page 2</a>
<div style="display:none;">
<h2>Page 2</h2>
<p>Content 2</p>
</div>
</li>
</ul>
</div>
<hr>
<div id="content">
<h2>Start page</h2>
<p>Paragraf</p>
</div>
<script src="external/jquery-1.6.2.min.js"></script>
<script>if ( typeof window.JSON === 'undefined' ) { console.log("Loaded json2"); document.write('<script src="external/json2.js"><\/script>'); }</script>
<script src="external/history.adapter.jquery.js"></script>
<script src="external/history.js"></script>
<script>
$(document).ready(function() {
History.enabled = true;
$('a').each(function() {
$(this).click(function(e) {
e.preventDefault();
var $link = $(e.target),
state = {'href': $link.attr('href'), 'title': $link.html()},
$div = $link.siblings('div'),
content = $div.html();
$('#content').html(content);
History.pushState(state, state.title, state.href);
return false;
});
});
History.Adapter.bind(window, 'statechange', function() {
var State = History.getState();
// remove double hit on event
console.log(State);
});
});
</script>
</body>
</html>
I have an example code below where if you click the links, then use back and forward, each state change will cause more and more hits on the statechange event. Instead of the one that I expect.
Links:
Code:
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>History start</title>
</head>
<body>
<h1>Headline</h1>
<hr>
<div id="menu">
<ul>
<li>
<a href="page-1">Page 1</a>
<div style="display:none;">
<h2>Page 1</h2>
<p>Content 1</p>
</div>
</li>
<li>
<a href="page-2">Page 2</a>
<div style="display:none;">
<h2>Page 2</h2>
<p>Content 2</p>
</div>
</li>
</ul>
</div>
<hr>
<div id="content">
<h2>Start page</h2>
<p>Paragraf</p>
</div>
<script src="external/jquery-1.6.2.min.js"></script>
<script>if ( typeof window.JSON === 'undefined' ) { console.log("Loaded json2"); document.write('<script src="external/json2.js"><\/script>'); }</script>
<script src="external/history.adapter.jquery.js"></script>
<script src="external/history.js"></script>
<script>
$(document).ready(function() {
History.enabled = true;
$('a').each(function() {
$(this).click(function(e) {
e.preventDefault();
var $link = $(e.target),
state = {'href': $link.attr('href'), 'title': $link.html()},
$div = $link.siblings('div'),
content = $div.html();
$('#content').html(content);
History.pushState(state, state.title, state.href);
return false;
});
});
History.Adapter.bind(window, 'statechange', function() {
var State = History.getState();
// remove double hit on event
console.log(State);
});
});
</script>
</body>
</html>
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评论（2）
这是因为您在加载页面时调用了pushState函数，这也会导致状态更改。我处于类似的情况，并且在我的pushStates之前使用了一个布尔值，所以我知道我正在做一个pushState。看起来像这样...
It's because you're calling the pushState function when you load the page, which also causes a statechange. I was in a similar situation and used a but a boolean before my pushStates so I knew I was doing a pushState. It looks like this...
虽然与您的具体问题无关，但我有一个场景，我需要从历史适配器中解除事件处理程序的绑定。为此，您可以从窗口取消绑定“statechange”事件，这是当您调用 History.Adapter.bind() 时 History.Adapter 绑定的事件：
您可以向该事件添加一个命名空间，以避免如上所述取消绑定其他不相关的事件处理程序，或使用命名函数专门解除该函数的绑定。
要使用上面的命名空间，您需要使用相同的命名空间绑定处理程序，即
While not relevant to your specific problem, I had a scenario where I needed to unbind the event handler from the History Adapter. To do so you can unbind the "statechange" event from window, which is what History.Adapter binds to when you call History.Adapter.bind() :
You can added a namespace to the event to avoid unbinding other unrelated event handlers as above, or use a named function to unbind that function specifically.
To use the above namespace, you would need to bind the handler using the same namespace, ie