minexmr value in dollars userscript

minexmr_dollars.js

// ==UserScript==
// @name         minexmr value in dollars
// @namespace    http://minexmr.com/
// @version      0.1
// @description  do a lookup of the current usd price of monero andd inject it into the minexmr.com worker stats
// @author       Ben "netjunki" Lau
// @match        https://minexmr.com/
// @grant        none
// ==/UserScript==

waitForKeyElements ('#yourPendingBalance', actionFunction, false);

function sleep(ms) {
  return new Promise(resolve => setTimeout(resolve, ms));
}

function actionFunction(jNode) {
    'use strict';
//    console.log(jNode[0]);
    var xmr = jNode[0].innerHTML.split(" ")[0];
    if (xmr == "") {
        sleep(2000).then(() => { actionFunction(jNode); });
    }
//    console.log(xmr);
    var targetUrl = "https://api.coingecko.com/api/v3/simple/price?ids=monero&vs_currencies=usd"
//    console.log(targetUrl);
fetch(targetUrl)
    .then(function (response) {
	// The API call was successful!
	return response.json();
}).then(function (json) {
//    console.log(json.monero.usd);
    if (xmr != "") {
      var inusd = json.monero.usd * xmr;
//    console.log(inusd);
      jNode[0].innerHTML = xmr + " XMR ($" + inusd + ")";
    }
}).catch(function (err) {
	// There was an error
	console.warn('Something went wrong.', err);
});
}

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;
}