MutationObserver wrapper to wait for the specified CSS selector
This script should not be not be installed directly. It is a library for other scripts to include with the meta directive // @require https://update.greasyfork.org/scripts/12228/80004/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 2.0.3
// ==/UserScript==
function setMutationHandler(baseNode, selector, cb, options) {
var ob = new MutationObserver(function(mutations) {
for (var i=0, ml=mutations.length, m; (i<ml) && (m=mutations[i]); i++)
switch (m.type) {
case 'childList':
for (var j=0, nodes=m.addedNodes, nl=nodes.length, n; (j<nl) && (n=nodes[j]); j++)
if (n.nodeType == 1)
if ((n = n.matches(selector) ? [n] : n.querySelectorAll(selector)) && n.length)
if (!cb.call(ob, Array.prototype.slice.call(n)))
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;
}