102 lines
2.2 KiB
HTML
102 lines
2.2 KiB
HTML
<!--
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Switch the mode between dark and light.
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v2.1
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https://github.com/cotes2020/jekyll-theme-chirpy
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© 2020 Cotes Chung
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MIT License
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-->
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<i class="mode-toggle fas fa-sun" light-mode-invisible></i>
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<i class="mode-toggle fas fa-moon" dark-mode-invisible></i>
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<script type="text/javascript">
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class ModeToggle {
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static get MODE_KEY() { return "mode"; }
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static get DARK_MODE() { return "dark"; }
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static get LIGHT_MODE() { return "light"; }
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constructor() {
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if (this.mode != null) {
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if (this.mode == ModeToggle.DARK_MODE) {
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if (!this.isDarkPrefer) {
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this.setDark();
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}
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} else {
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if (this.isDarkPrefer) {
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this.setLight();
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}
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}
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}
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var self = this;
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/* always follow the system prefers */
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this.sysDarkPrefers.addListener(function() {
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if (self.mode != null) {
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if (self.mode == ModeToggle.DARK_MODE) {
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if (!self.isDarkPrefer) {
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self.setDark();
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}
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} else {
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if (self.isDarkPrefer) {
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self.setLight();
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}
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}
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self.clearMode();
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}
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});
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} /* constructor() */
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setDark() {
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$('html').attr(ModeToggle.MODE_KEY, ModeToggle.DARK_MODE);
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sessionStorage.setItem(ModeToggle.MODE_KEY, ModeToggle.DARK_MODE);
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}
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setLight() {
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$('html').attr(ModeToggle.MODE_KEY, ModeToggle.LIGHT_MODE);
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sessionStorage.setItem(ModeToggle.MODE_KEY, ModeToggle.LIGHT_MODE);
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}
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clearMode() {
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$('html').removeAttr(ModeToggle.MODE_KEY);
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sessionStorage.removeItem(ModeToggle.MODE_KEY);
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}
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get sysDarkPrefers() {
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return window.matchMedia("(prefers-color-scheme: dark)");
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}
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get isDarkPrefer() {
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return this.sysDarkPrefers.matches;
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}
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get mode() {
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return sessionStorage.getItem(ModeToggle.MODE_KEY);
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}
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flipMode() {
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if ((this.mode == null && this.isDarkPrefer) ||
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this.mode == ModeToggle.DARK_MODE) {
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this.setLight();
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} else { /* light mode or default-light */
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this.setDark();
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}
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}
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} /* ModeToggle */
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let toggle = new ModeToggle();
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$(".mode-toggle").click(function() {
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toggle.flipMode();
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});
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</script> |