https://www.pressenaevnet.dk/wp-content/plugins/nkt-font-scaler//font-scaler.js?ver=9c3bee37

1(function ($) {
2    var STORAGE_KEY = "fontScaler.fontSize";
3    var STORAGE_TIME_KEY = "fontScaler.savedAt";
4    var TTL_MS = 24 * 60 * 60 * 1000; // 24 hours
5
6    function setDisabled(newSize) {
7        $("#font-scaler-decrease").prop("disabled", newSize === 1);
8        $("#font-scaler-increase").prop("disabled", newSize === 2);
9    }
10
11    function loadSavedFontSize() {
12        try {
13            var saved = sessionStorage.getItem(STORAGE_KEY);
14            var savedAtRaw = sessionStorage.getItem(STORAGE_TIME_KEY);
15            var savedAt = savedAtRaw ? parseInt(savedAtRaw, 10) : 0;
16
17            if (saved) {
18                var isFresh = savedAt && (Date.now() - savedAt) <= TTL_MS;
19                if (isFresh) {
20                    var size = parseFloat(saved);
21                    if (!isNaN(size)) {
22                        $("html").css("font-size", size + "rem").data("font-size", size);
23                        setDisabled(size);
24                        return size;
25                    }
26                } else {
27                    sessionStorage.removeItem(STORAGE_KEY);
28                    sessionStorage.removeItem(STORAGE_TIME_KEY);
29                }
30            }
31        } catch (e) {}
32        return null;
33    }
34
35    function saveFontSize(size) {
36        try {
37            sessionStorage.setItem(STORAGE_KEY, String(size));
38            sessionStorage.setItem(STORAGE_TIME_KEY, String(Date.now()));
39        } catch (e) {}
40    }
41
42    var initialSize = loadSavedFontSize();
43    if (initialSize === null) {
44        $("html").data("font-size", 1);
45        setDisabled(1);
46    }
47
48    $(document).on("click", "#font-scaler-decrease", function () {
49        var newSize = $("html").data("font-size") - 0.1;
50        if (newSize < 1) {
51            newSize = 1;
52        }
53        newSize = Math.round(newSize * 10) / 10;
54
55        $("html").css("font-size", newSize + "rem").data("font-size", newSize);
56        setDisabled(newSize);
57        saveFontSize(newSize);
58    });
59
60    $(document).on("click", "#font-scaler-increase", function () {
61        var newSize = $("html").data("font-size") + 0.1;
62        if (newSize > 2) {
63            newSize = 2;
64        }
65        newSize = Math.round(newSize * 10) / 10;
66
67        $("html").css("font-size", newSize + "rem").data("font-size", newSize);
68        setDisabled(newSize);
69        saveFontSize(newSize);
70    });
71})(jQuery);