$(window)绑定hashchange如何检查部分hash改变了? [英] $(window) bind hashchange how to check part hash changed?
本文介绍了$(window)绑定hashchange如何检查部分hash改变了?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我正在学习Google Ajax Crawlable
我使用$(window) bind hashchange
来控制ajax页面加载.
I use $(window) bind hashchange
to control ajax page loading.
我的网址,例如:domain.com/#!/keywords&num=1
有两种变化
-
domain.com/#!/apple&num=1
=>domain.com/#!/apple&num=2
domain.com/#!/apple&num=1
=> domain.com/#!/banana&num=1
那么如何检查$(window) bind hashchange
是否从apple
=> banana
更改了哈希部分?谢谢.
so how to check if $(window) bind hashchange
changed hash part from apple
=> banana
? Thanks.
$(window).bind('hashchange', function() {
// make a judge like if(){}else{}
});
推荐答案
将哈希存储在变量中,并在函数末尾更新变量.考虑:
Store the hash in a variable, and update the variable at the end of the function. Consider:
(function(){
var lastHash = location.hash;
$(window).bind('hashchange', function() {
var newHash = location.hash;
// Do something
var diff = compareHash(newHash, lastHash);
alert("Difference between old and new hash:\n"+diff[0]+"\n\n"+dif[1]);
//At the end of the func:
lastHash = newHash;
});
function compareHash(current, previous){
for(var i=0, len=Math.min(current.length, previous.length); i<len; i++){
if(current.charAt(0) != previous.charAt(0)) break;
}
current = current.substr(i);
previous = previous.substr(i);
for(var i=0, len=Math.min(current.length, previous.length); i<len; i++){
if(current.substr(-1) != previous.substr(-1)) break;
}
//Array: Current = New hash, previous = old hash
return [current, previous];
}
})()
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