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firelite / equityzen | trending startup ipo's filter by Fire Lite

// ==UserScript==
// @name         equityzen | trending startup ipo's filter by Fire Lite
// @namespace    http://firelite.co
// @version      0.1.0
// @description  EquityZen Trending Startups IPO filter
// @author       Fire Lite
// @license GPL-3.0+; http://www.gnu.org/licenses/gpl-3.0.txt
// @match        https://equityzen.com/trending/*
// @grant        GM_addStyle
// @require      http://code.jquery.com/jquery-latest.js
// @requirezzz      https://gist.github.com/raw/2625891/waitForKeyElements.js
// ==/UserScript==




function add_class(){
    $('a.company-tile div.ribbon:contains("IPO")').parent().parent().addClass('ipo');
    
}

function add_buttons(){
    var filters = '<div class="trending-filters"><h3>Filter by:</h3><button name="IPO">IPO</button></div>';
    $('.trending-search').after(filters);
    $('button[name=IPO]').click(function(){ $('a.company-tile:not(.ipo)').toggle(); });
}




waitForKeyElements ('', add_class());

$(document).ready(function(){
    setTimeout(function() {
        add_class();
        add_buttons()        
    }, 1000);
});

/*--- waitForKeyElements():  A utility function, for Greasemonkey scripts,
    that detects and handles AJAXed content.

    Usage example:

        waitForKeyElements (
            "div.comments"
            , commentCallbackFunction
        );

        //--- Page-specific function to do what we want when the node is found.
        function commentCallbackFunction (jNode) {
            jNode.text ("This comment changed by waitForKeyElements().");
        }

    IMPORTANT: This function requires your script to have loaded jQuery.
*/
function waitForKeyElements (
    selectorTxt,    /* Required: The jQuery 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.
                    */
    iframeSelector  /* Optional: If set, identifies the iframe to
                        search.
                    */
) {
    var targetNodes, btargetsFound;

    if (typeof iframeSelector == "undefined")
        targetNodes     = $(selectorTxt);
    else
        targetNodes     = $(iframeSelector).contents ()
                                           .find (selectorTxt);

    if (targetNodes  &&  targetNodes.length > 0) {
        btargetsFound   = true;
        /*--- Found target node(s).  Go through each and act if they
            are new.
        */
        targetNodes.each ( function () {
            var jThis        = $(this);
            var alreadyFound = jThis.data ('alreadyFound')  ||  false;

            if (!alreadyFound) {
                //--- Call the payload function.
                var cancelFound     = actionFunction (jThis);
                if (cancelFound)
                    btargetsFound   = false;
                else
                    jThis.data ('alreadyFound', true);
            }
        } );
    }
    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,
                                            iframeSelector
                                        );
                },
                300
            );
            controlObj [controlKey] = timeControl;
        }
    }
    waitForKeyElements.controlObj   = controlObj;
}