Reveal more forecast data

better_surfline.js

// ==UserScript==
// @name         Free Surfline Forecasts
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  Unblurr restricted forecast data. They are dumb enough to actually put the real data in the DOM.
// @author       samtay
// @match        http*://www.surfline.com/*
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    window.onload = function () {
        improveAllThings();
        document.querySelectorAll('.sl-forecast-data-view-toggle__button').forEach(function(btn) {
            btn.addEventListener('click', function() {
                for (var i = 1; i < 5; i++) {
                    setTimeout(improveAllThings, i*1000);
                };
            });
        });
    };

    var improveAllThings = function () {
        // unblur hidden items
        document.querySelectorAll('[class$=blurred]').forEach(function(el) {
            el.className -= '--blurred';
        });
        // remove blocking advertisement callouts
        document.querySelectorAll('.sl-forecast-graphs-cta').forEach(function(el){el.remove();});
        document.querySelectorAll('.sl-forecast-table-cta').forEach(function(el){el.remove();});
        // fix styling on unblurred items
        document.querySelectorAll('.NaN').forEach(function(el){
            el.className = el.previousElementSibling ? el.previousElementSibling.className : '';
        });
    };
})();