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fix: themes broken when localStorage has invalid theme id stored #2463

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merged 1 commit into from
Nov 2, 2024
Merged

fix: themes broken when localStorage has invalid theme id stored #2463

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6 changes: 5 additions & 1 deletion src/theme/book.js
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Original file line number Diff line number Diff line change
Expand Up @@ -289,6 +289,10 @@ function playground_text(playground, hidden = true) {
var themeToggleButton = document.getElementById('theme-toggle');
var themePopup = document.getElementById('theme-list');
var themeColorMetaTag = document.querySelector('meta[name="theme-color"]');
var themeIds = [];
themePopup.querySelectorAll('button.theme').forEach(function (el) {
themeIds.push(el.id);
});
var stylesheets = {
ayuHighlight: document.querySelector("[href$='ayu-highlight.css']"),
tomorrowNight: document.querySelector("[href$='tomorrow-night.css']"),
Expand Down Expand Up @@ -317,7 +321,7 @@ function playground_text(playground, hidden = true) {
function get_theme() {
var theme;
try { theme = localStorage.getItem('mdbook-theme'); } catch (e) { }
if (theme === null || theme === undefined) {
if (theme === null || theme === undefined || !themeIds.includes(theme)) {
return default_theme;
} else {
return theme;
Expand Down