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Add theme toggle back and default to 'auto'

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This commit is contained in:
Dave Gallant
2024-01-12 16:55:10 -05:00
parent 24ad44a9ec
commit b913e9b4a3
5 changed files with 69 additions and 22 deletions
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48
themes/hugo-theme-gruvbox/assets/js/dark-mode.js
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@@ -1,11 +1,12 @@
function getTheme() {
if (window.matchMedia) {
// OS preference
return window.matchMedia("(prefers-color-scheme: light)").matches
? "light"
: "dark";
if (localStorage && localStorage.getItem("theme")) {
return localStorage.getItem("theme");
}
// Undefined
return "auto";
}
function saveTheme(theme) {
localStorage.setItem("theme", theme);
}
function setPrismTheme(theme) {
@@ -26,16 +27,39 @@ function setCommentsTheme(theme) {
}
}
// Initial load
const theme = getTheme();
if (theme) {
function setTheme(theme) {
if (theme == "auto") {
theme = window.matchMedia("(prefers-color-scheme: light)").matches
? "light"
: "dark";
}
document.documentElement.setAttribute("data-theme", theme);
setPrismTheme(theme);
setCommentsTheme(theme);
}
function toggleTheme(e) {
const theme = e.currentTarget.classList.contains("light--hidden")
? "light"
: "dark";
setTheme(theme);
saveTheme(theme);
}
// Initial load
setTheme(getTheme());
window
.matchMedia("(prefers-color-scheme: dark)")
.addEventListener("change", (event) => {
const theme = event.matches ? "dark" : "light";
setPrismTheme(theme);
setCommentsTheme(theme);
setTheme(getTheme());
});
// This script is inlined in the <head> of the document, so we have to wait
// for the DOM content before can add event listeners to the toggle buttons
document.addEventListener("DOMContentLoaded", function () {
const toggleButtons = document.querySelectorAll(".theme__toggle");
toggleButtons.forEach((btn) => {
btn.addEventListener("click", toggleTheme);
});
});