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1
2function checkForParentTheme(element, theme) {
3 let parent = element.parentElement;
4 while (parent) {
5 //if (parent.classList.contains("target")) {
6 const parentTheme = parent.getAttribute("theme");
7 //if (!parentTheme) return false;
8 if (parentTheme)
9 return parentTheme !== theme;
10 //}
11 parent = parent.parentElement;
12 }
13
14 return false;
15}
16
17export function main(target, initialTheme = null) {
18 const storedTheme = localStorage.getItem("theme");
19 let theme = initialTheme || storedTheme || "blackboard";
20 target.setAttribute("theme", theme);
21
22 if (target === document.body) {
23 localStorage.setItem("theme", theme);
24 }
25
26 if (checkForParentTheme(target, theme)) {
27 target.setAttribute("theme-changed", "");
28 } else {
29 target.removeAttribute("theme-changed");
30 }
31
32 return { replace: false };
33}
34