jQuery $(window) bind hashchange 如何检查部分哈希改变？
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$(window) bind hashchange how to check part hash changed?
提问by Giberno
I am studing Google Ajax Crawlable
我正在学习 Google Ajax Crawlable
I use $(window) bind hashchangeto control ajax page loading.
我$(window) bind hashchange用来控制ajax页面加载。
my url like: domain.com/#!/keywords&num=1
我的网址像： domain.com/#!/keywords&num=1
there has two kind of change
有两种变化
domain.com/#!/apple&num=1=>domain.com/#!/apple&num=2domain.com/#!/apple&num=1=>domain.com/#!/banana&num=1
domain.com/#!/apple&num=1=>domain.com/#!/apple&num=2domain.com/#!/apple&num=1=>domain.com/#!/banana&num=1
so how to check if $(window) bind hashchangechanged hash part from apple=> banana? Thanks.
那么如何检查是否$(window) bind hashchange从apple=>更改了哈希部分banana？谢谢。
$(window).bind('hashchange', function() {
// make a judge like if(){}else{}
});
回答by Rob W
Store the hash in a variable, and update the variable at the end of the function. Consider:
将散列存储在变量中，并在函数结束时更新变量。考虑：
(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];
}
})()
回答by maxedison
I would store the original hash in a variable, and then examine the new hash to judge the change. Once that is done, set the new hash to be the original:
我会将原始散列存储在一个变量中，然后检查新散列以判断更改。完成后，将新散列设置为原始散列：
var originalHash = window.location.hash;
$(window).bind('hashchange', function() {
var newHash = window.location.hash;
//do your stuff based on the comparison of newHash to originalHash
originalHash = newHash;
});
