w84Kel

Permet de se déclencher à l'arrivée d'un élément sur une page.
此脚本不应直接安装。它是供其他脚本使用的外部库，要使用该库请加入元指令 // @require https://update.gf.qytechs.cn/scripts/394721/763614/w84Kel.js
换行
// ==UserScript==
// @name         w84Kel
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  Permet de se déclencher à l'arrivée d'un élément sur une page.
// @author       CoStiC
// @include        *://*/*
// @grant        none
// ==/UserScript==


'use strict';

/*--- waitForKeyElements():  A utility function, for Greasemonkey scripts,
that detects and handles AJAXed content. Forked for use without JQuery.
Usage example:
    waitForKeyElements (
        "div.comments"
        , commentCallbackFunction
    );
    //--- Page-specific function to do what we want when the node is found.
    function commentCallbackFunction (element) {
        element.text ("This comment changed by waitForKeyElements().");
    }
IMPORTANT: Without JQuery, this fork does not look into the content of
iframes.
*/
function waitForKeyElements(
    selectorTxt, /* Required: The selector string that specifies the desired element(s). */
    actionFunction, /* Required: The code to run when elements are found. It is passed a jNode to the matched element. */
    bWaitOnce /* Optional: If false, will continue to scan for new elements even after the first match is found. */
) {
    var targetNodes, btargetsFound;
    targetNodes = document.querySelectorAll(selectorTxt);

    if (targetNodes && targetNodes.length > 0) {
        btargetsFound = true;
        /*--- Found target node(s).  Go through each and act if they are new.*/
        targetNodes.forEach(function (element) {
            var alreadyFound = element.dataset.found == 'alreadyFound' ? 'alreadyFound' : false;

            if (!alreadyFound) {
                //--- Call the payload function.
                var cancelFound = actionFunction(element);
                if (cancelFound) btargetsFound = false;
                else element.dataset.found = 'alreadyFound';
            }
        });
    } else {
        btargetsFound = false;
    }

    //--- Get the timer-control variable for this selector.
    var controlObj = waitForKeyElements.controlObj || {};
    var controlKey = selectorTxt.replace(/[^\w]/g, "_");
    var timeControl = controlObj[controlKey];

    //--- Now set or clear the timer as appropriate.
    if (btargetsFound && bWaitOnce && timeControl) {
        //--- The only condition where we need to clear the timer.
        clearInterval(timeControl);
        delete controlObj[controlKey];
    } else {
        //--- Set a timer, if needed.
        if (!timeControl) {
            timeControl = setInterval(function () {
                    waitForKeyElements(selectorTxt,
                        actionFunction,
                        bWaitOnce
                    );
                },
                300
            );
            controlObj[controlKey] = timeControl;
        }
    }
    waitForKeyElements.controlObj = controlObj;
}
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