web/js/nms-nightmode.js


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23

"use strict";

var nmsNightMode = nmsNightMode || {};

var prefersColorSchemeMediaQuery = "(prefers-color-scheme: dark)";

nmsNightMode.toggle = function () {
  if (nms.nightMode) {
    console.log(
      "nightmode already set, not following system (remove cookies & url param to re-enable system following)"
    );
    return;
  }

  var active = window.matchMedia(prefersColorSchemeMediaQuery).matches;
  nms.nightMode = active;
};

nmsNightMode.init = function () {
  var preferColorScheme = window.matchMedia(prefersColorSchemeMediaQuery);
  preferColorScheme.addListener(() => nmsNightMode.toggle());
  nmsNightMode.toggle(); // trigger initial
};