MutationObserver wrapper to wait for the specified CSS selector
目前为
此脚本不应直接安装，它是一个供其他脚本使用的外部库。如果您需要使用该库，请在脚本元属性加入：// @require https://update.cn-greasyfork.org/scripts/12228/135916/setMutationHandler.js
/* EXAMPLE:
setMutationHandler(document, '.container p.some-child', function(nodes) {
// single node:
nodes[0].remove();
// or multiple nodes:
nodes.forEach(function(node) {
node.style.display = 'none';
});
//this.disconnect(); // disconnect the observer, this is useful for one-time jobs
return true; // continue enumerating current batch of mutations
});
*/
// ==UserScript==
// @name setMutationHandler
// @description MutationObserver wrapper to wait for the specified CSS selector
// @namespace wOxxOm.scripts
// @author wOxxOm
// @grant none
// @version 2.0.5
// ==/UserScript==
function setMutationHandler(baseNode, selector, cb, options) {
var ob = new MutationObserver(function handler(mutations, fromTimer) {
if (mutations.length > 100 && !fromTimer)
return setTimeout(function() { handler(mutations, true) }, 0);
for (var i=0, ml=mutations.length, m; (i<ml) && (m=mutations[i]); i++)
switch (m.type) {
case 'childList':
if (m.addedNodes[0] && m.addedNodes[0].nodeType == 3) { // TEXT_NODE
if (m.target.matches(selector) && !cb.call(ob, [m.target], m))
return;
continue;
}
for (var j=0, nodes=m.addedNodes, nl=nodes.length, n; (j<nl) && (n=nodes[j]); j++)
if (n.nodeType == 1) { // ELEMENT_NODE
n = n.matches(selector) ? [n] : Array.prototype.slice.call(n.querySelectorAll(selector));
if (n.length && !cb.call(ob, n, m))
return;
}
break;
case 'attributes':
if (m.target.matches(selector) && !cb.call(ob, [m.target], m))
return;
break;
case 'characterData':
if (m.target.parentNode && m.target.parentNode.matches(selector) && !cb.call(ob, [m.target.parentNode], m))
return;
break;
}
});
ob.observe(baseNode, options || {subtree:true, childList:true});
return ob;
}