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<template>
<a
v-on:click="toggleTheme()"
aria-label="Toggle dark mode"
class="navbar-item is-inline-block-mobile"
>
<i :class="`${faClasses[mode]}`" class="fa-fw" :title="`${titles[mode]}`"></i>
</a>
</template>
<script>
export default {
name: "Darkmode",
data: function () {
return {
isDark: null,
faClasses: null,
titles: null,
mode: null,
};
},
created: function () {
this.faClasses = ["fas fa-adjust", "fas fa-circle", "far fa-circle"];
this.titles = ["Auto-switch", "Light theme", "Dark theme"]
this.mode = 0;
if ("overrideDark" in localStorage) {
// Light theme is 1 and Dark theme is 2
this.mode = JSON.parse(localStorage.overrideDark) ? 2 : 1;
}
this.isDark = this.getIsDark();
this.$emit("updated", this.isDark);
},
methods: {
toggleTheme: function () {
this.mode = (this.mode + 1) % 3
switch(this.mode) {
// Default behavior
case 0:
localStorage.removeItem("overrideDark");
break
// Force light theme
case 1:
localStorage.overrideDark = false;
break
// Force dark theme
case 2:
localStorage.overrideDark = true;
break
default:
// Should be unreachable
break
}
this.isDark = this.getIsDark();
this.$emit("updated", this.isDark);
},
getIsDark: function() {
const values = [matchMedia("(prefers-color-scheme: dark)").matches, false, true];
return values[this.mode];
}
},
};
</script>
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