我正在使用History API并使用push和pop状态。我想在某些情况下停止popstate事件,我只将哈希附加到URL。例如,在某些情况下,点击锚点会将#
附加到网址,并立即触发popstate)我想避免将#
或#somehasvalue
附加到网址的所有情况阻止popstate开火。我正在使用查询参数维护网址,我没有任何情况需要在网址中使用#
触发popstate事件。
这是我的代码。
if (supportsHistoryApi()) {
window.onpopstate = function (event) {
var d = event.state || {state_param1: param1, state_param2: param2};
var pathName = window.location.pathname,
params = window.location.search;
loadData(event, pathName + params, d.state_param1, d.state_param2);
}
答案 0 :(得分:8)
据我所知,你无法阻止popstate开火。
您可以做的是检查event.state
对象。在散列更改时,这将为null。
所以我建议添加一个
if(event.state === null) {
event.preventDefault();
return false;
}
从一开始就到你的popstate事件处理程序。 我认为这是防止在哈希值发生变化时触发popstate处理代码的最佳方法,但我有兴趣知道是否还有其他解决方案。
答案 1 :(得分:0)
万一有人仍然需要这个:
var is_hashed = false;
$(window).on('hashchange', function() {
is_hashed = true;
});
window.addEventListener('popstate', function(e){
// if hashchange
if (is_hashed) {
e.preventDefault();
// reset
is_hashed = false;
return false;
}
// Your code to handle popstate here
..................
});
答案 2 :(得分:0)
这很简单。
为防止在单击带有哈希的链接后触发popstate
事件,您必须消除单击链接的后果-将哈希添加到浏览器地址栏中。
基本上,您必须为click
事件创建处理程序,检查是否单击了您希望防止在URL中出现哈希值并通过在其中调用event.preventDefault();
来防止哈希值出现的元素处理程序。
这是代码示例:
/**
* This your existing `onpopstate` handler.
*/
window.onpopstate = function(e) {
// You could want to prevent defaut behaviour for `popstate` event too.
// e.preventDefault();
// Your logic here to do things.
// The following reload is just an example of what you could want to make
// in this event handler.
window.location.reload();
};
/**
* This is the `click` event handler that conditionally prevents the default
* click behaviour.
*/
document.addEventListener('click', function(e) {
// Here you check if the clicked element is that special link of yours.
if (e.target.tagName === "A" && e.target.hash.indexOf('#the-link-i-want-make-discernable') > -1) {
// The 'e.preventDefault()' is what prevent the hash to be added to
// the URL and therefore prevents your 'popstate' handler to fire.
e.preventDefault();
processMySpecialLink(e, e.target);
}
});
/**
* Just an example of the link click processor in case you want making something
* more on the link click (e.g. smooth scroll to the hash).
*/
function processMySpecialLink(e, target) {
// Make things here you want at user clicking your discernable link.
}
以下是匹配的HTML标记:
<!-- Somewhere in the markup -->
<span id="the-link-i-want-make-discernable"></span>
<!-- Some markup -->
<a href="#the-link-i-want-make-discernable">My Special Link</a>
<!-- Another markup -->
<a href="#just-common-link">Any other link</a>
这一切都做上述操作:防止特殊哈希链接的默认行为。副作用是,在单击popstate
哈希链接的特殊情况下,不会为URL添加任何哈希,因此不会触发#the-link-i-want-make-discernable
事件。
答案 3 :(得分:0)
我有解决办法!
window.pop_old = document.location.pathname;
window.pop_new = '';
window.onpopstate = function (event) {
window.pop_new = document.location.pathname;
if(pop_new != pop_old){
//diferent path: not just the hash has changed
} else {
//same path: just diferent hash
}
window.pop_old = pop_new; //save for the next interaction
};