HTML表格的onChange [英] HTML table onChange
问题描述
我有一个问题:我有表时时更新时间由AJAX脚本。此更新通过Chrome插件,我不想改变调用。所以,我想补充一些jQuery的触发器上表单元格的变化会打电话给我自己的功能。
I have a problem: I have table that is updated from time to time by AJAX script. This update is called from Chrome plugin which I don't want to change. So I'd like to add some kind of jQuery trigger that on change of table cells will call my own function.
这可能吗?我试过的onChange事件,但它不工作(这是输入,如果我是对的)
Is it possible? I tried event onChange but it doesn't work (it's for input if I'm right)
在此先感谢!
推荐答案
的onchange
是专为输入使用像<选择>
- 所以不会工作在这方面。有一些特定的DOM相关的事件,你可以使用的(如 DOMSubtreeModified
)的,但这些都不是跨浏览器并有不同的实现的(即使是现在,他们可能会去precated)的:
onchange
is designed for use with inputs like <select>
- so wont work in this context. There are specific dom related events you can use (like DOMSubtreeModified
), but these aren't cross-browser and have varying implementations (they may even now be deprecated):
http://en.wikipedia.org/wiki/DOM_events
MutationEvents
上述似乎已经被换成 MutationObservers
,我没有使用过但自己...但是听起来像它会做你的需要:
MutationEvents
as mentioned above have seemingly been replaced by MutationObservers
which I have not used yet myself... but sounds like it would do what you need:
HTTP://dvcs.w3。组织/ HG / domcore /原始文件/提示/ Overview.html#突变观察家
以外,你可以回退到的setInterval
处理程序将侦听目标元素中的HTML的任何变化......当它改变时,你火了功能。
Other than that you can fallback to a setInterval
handler that will listen for any change in the HTML within your target element... when it changes you fire a function.
function watch( targetElement, triggerFunction ){
/// store the original html to compare with later
var html = targetElement.innerHTML;
/// start our constant checking function
setInterval(function(){
/// compare the previous html with the current
if ( html != targetElement.innerHTML ) {
/// trigger our function when a change occurs
triggerFunction();
/// update html so that this doesn't keep triggering
html = targetElement.innerHTML;
}
},500);
}
function whenChangeHappens(){
alert('this will trigger when the html changes in my_target');
}
watch( document.getElementById('my_target'), whenChangeHappens );
jQuery插件
如果你想上面jQueryify的到的东西,你可以应用到任何元素,将便于修改:
jQuery Plugin
If you want to jQueryify the above into something you can apply to any element it would easy to modify:
/// set up the very simple jQuery plugin
(function($){
$.fn.domChange = function( whenChanged ){
/// we want to store our setInterval statically so that we
/// only use one for all the listeners we might create in a page
var _static = $.fn.domChange;
_static.calls = [];
_static.iid = setInterval( function(){
var i = _static.calls.length;
while ( i-- ) {
if ( _static.calls[i] ) {
_static.calls[i]();
}
}
}, 500 );
/// step each element in the jQuery collection and apply a
/// logic block that checks for the change in html
this.each (function(){
var target = $(this), html = target.html();
/// by adding the function to a list we can easily switch
/// in extra checks to the main setInterval function
_static.calls.push (function(){
if ( html != target.html() ) {
html = target.html();
whenChanged();
}
});
});
}
})(typeof jQuery != undefined && jQuery);
/// example code to test this
(function($){
$(function(){
$('div').domChange( function(){
alert('I was changed!');
} );
});
})(typeof jQuery != undefined && jQuery);
显然,上面是一个很简单的版本,它应该被扩展到处理添加和删除听众。
Obviously the above is a very simple version, it should be extended to handle adding and removing of listeners.
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