https://finviz.com/assets/dist/script/refresh.v1.5fec1e6b.js

1function getCurrentDateInMs() {
2  return (new Date()).valueOf()
3}
4
5function getIsDocumentVisible() {
6  return document.visibilityState === 'visible' || document.hidden === false
7}
8
9/**
10 * Calls the callback at most every `interval` milliseconds if the window is visible.
11 *
12 * @param {number} interval in ms
13 * @param {() => void} callback
14 */
15function intervalCallbackOnWindowVisible(interval, callback) {
16    var nextRefresh = getCurrentDateInMs() + interval
17    /** @type {NodeJS.Timeout} */
18    var refreshTimeout = null
19
20    function refresh() {
21      nextRefresh = getCurrentDateInMs() + interval
22      // Queue next refresh
23      refreshTimeout = setTimeout(refresh, interval);
24      // Call callback asynchronously
25      setTimeout(callback, 0)
26    }
27
28    document.addEventListener('visibilitychange', function () {
29        clearTimeout(refreshTimeout)
30
31        if (getIsDocumentVisible()) {
32            var currentDateMs = getCurrentDateInMs()
33            // Refresh if the document is stale, otherwise set a timeout to refresh later
34            if (nextRefresh <= currentDateMs) {
35                refresh()
36            } else {
37                refreshTimeout = setTimeout(refresh, nextRefresh - currentDateMs)
38            }
39        }
40    })
41
42    if (getIsDocumentVisible()) {
43      refreshTimeout = setTimeout(refresh, interval);
44    }
45}
46
47var refreshIds;
48var currentVersion = null;
49var pageRefreshInterval = 3600 * 1000;
50function RefreshInit(refresh, ids, initVersion) {
51    refreshIds = ids;
52    intervalCallbackOnWindowVisible(refresh * 1000, Refresh)
53
54    if (initVersion !== undefined) currentVersion = initVersion.toString()
55}
56
57function RefreshOnVersionChange(initVersion, interval) {
58    currentVersion = initVersion.toString()
59
60    intervalCallbackOnWindowVisible(interval || pageRefreshInterval, () => {
61        simpleFetch(window.location.href, { method: 'options' })
62          .then(function (res) {
63              if (!checkVersionMatches(res.headers)) window.location.reload()
64          })
65          .catch(function () {})
66    })
67}
68
69function RefreshImageRevInit(refresh, container) {
70  var containerEl = document.getElementById(container)
71
72  intervalCallbackOnWindowVisible(refresh * 1000, function OnRefreshImageRevs() {
73    if (!containerEl) return
74
75    var imgs = containerEl.getElementsByTagName('img');
76    var rev = new Date().getTime();
77    for (var i = 0; i < imgs.length; i++) {
78        var img = imgs[i];
79        var isChartImage = img.srcset.indexOf('/chart?') >= 0 || img.srcset.indexOf('fut_image') >= 0 || img.srcset.indexOf('fx_image') >= 0
80
81        if (!isChartImage) continue;
82
83        img.srcset = img.srcset.split(', ').map(function (set) {
84          var setParts = set.trim().split(' ').reverse();
85          var url = setParts.pop();
86          return [updateRevForProp(url, rev)].concat(setParts.reverse()).join(' ')
87        }).join(', ')
88    }
89  })
90}
91
92function OnRefresh(result) {
93    for (var i = 0; i < refreshIds.length; i++) {
94        var id = refreshIds[i];
95        var newDocument = new DOMParser().parseFromString(result, 'text/html')
96        if (newDocument) {
97            var oldContainerElement = document.getElementById(id)
98            var newContainerElement = newDocument.getElementById(id)
99
100            if (oldContainerElement && newContainerElement) {
101                oldContainerElement.innerHTML = newContainerElement.innerHTML
102            }
103        }
104    }
105
106    // Dispatch custom event for React components to re-attach listeners
107    window.dispatchEvent(new CustomEvent('finviz:refresh', { detail: { ids: refreshIds } }))
108
109    window.gtag && window.gtag('event', 'refresh', { event_category: 'page' });
110    // Refresh any ads that might be on the page
111    if (window.finvizBannersLoaded === true) {
112      typeof window.initFinvizBanners === "function" && window.initFinvizBanners()
113    } else if (typeof window.refreshAds === 'function') {
114      var adSelectors = refreshIds.reduce(function (prev, current) {
115        prev.push('#' + current + ' [id*=IC_D_]');
116        return prev;
117      }, []);
118      window.refreshAds(adSelectors.join(','));
119    }
120}
121
122function simpleFetch(url, options) {
123    return fetch(url, options)
124      .then(function(response) {
125          if (!response.ok) return
126          return response
127      })
128      .catch(function() {})
129}
130
131function Refresh() {
132    simpleFetch(window.location.href, {
133      headers: {
134        'X-Theme': window.FinvizSettings.hasDarkTheme ? 'dark' : window.FinvizSettings.hasRedesignEnabled ? 'light' : 'legacy',
135      }
136    })
137      .then(function(res){
138          if (!res) {
139              return Promise.resolve(undefined)
140          }
141
142          if (!checkVersionMatches(res.headers)) {
143              window.location.reload()
144              return
145          }
146          return res.text()
147      })
148      .then(function (data) {
149          if (data === undefined) {
150              return
151          }
152          OnRefresh(data)
153      })
154}
155
156function updateRevForProp(prop, rev) {
157  let srcRevPos = prop.indexOf("&rev=");
158  let searchPartIndex = prop.indexOf('?')
159  if (srcRevPos >= 0 && searchPartIndex > -1) {
160    let path = prop.substring(0, searchPartIndex)
161    let search = prop.substring(searchPartIndex + 1)
162    let searchParams = new URLSearchParams(search)
163    searchParams.set('rev', rev)
164
165    return path + '?' + searchParams.toString()
166  };
167
168  return prop + "&rev=" + rev
169}
170
171function checkVersionMatches(headers) {
172  var refreshVersion = headers.get('X-REFRESH-VERSION')
173  if (currentVersion === null) currentVersion = refreshVersion
174
175  return refreshVersion === null || refreshVersion === currentVersion
176}