我正在实现一个铬扩展应用程序。我想用“#”替换标签中的href属性(在我的webapp主页上)。的问题是,这个标记可能是由ajax动态加载的,并且可以通过用户操作重新加载。对于如何让chrome扩展检测ajax加载的html内容有什么建议吗?
发布于 2013-08-02 12:43:48
有两种方法,
第一个解决方案是处理ajax请求。
.ajaxComplete()函数在jQuery中处理页面上的所有ajax请求。
在content script中,
var actualCode = '(' + function() {
$(document).ajaxComplete(function() {
alert('content has just been changed, you should change href tag again');
// chaging href tag code will be here
});
} + ')();';
var script = document.createElement('script');
script.textContent = actualCode;
(document.head||document.documentElement).appendChild(script);
script.parentNode.removeChild(script);第二个解决方案是监听内容更改。
这在突变事件中是可能的,在content script中也是如此。
$(document).bind("DOMSubtreeModified", function() {
alert("something has been changed on page, you should update href tag");
});您可以使用一些不同的选择器来限制控制更改的元素。
$("body").bind("DOMSubtreeModified", function() {}); // just listen changes on body content
$("#mydiv").bind("DOMSubtreeModified", function() {}); // just listen changes on #mydiv content发布于 2019-07-07 20:22:49
接受的答案已经过时了。截至目前,2019年,突变事件已不再受欢迎。人们应该使用MutationObserver。下面是如何在纯javascript中使用它:
// Select the node that will be observed for mutations
var targetNode = document.getElementById('some-id');
// Options for the observer (which mutations to observe)
var config = { attributes: true, childList: true, subtree: true };
// Callback function to execute when mutations are observed
var callback = function(mutationsList, observer) {
for(var mutation of mutationsList) {
if (mutation.type == 'childList') {
console.log('A child node has been added or removed.');
}
else if (mutation.type == 'attributes') {
console.log('The ' + mutation.attributeName + ' attribute was modified.');
}
}
};
// Create an observer instance linked to the callback function
var observer = new MutationObserver(callback);
// Start observing the target node for configured mutations
observer.observe(targetNode, config);
// Later, you can stop observing
observer.disconnect();https://stackoverflow.com/questions/17986020
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