38 lines
1.5 KiB
TypeScript
38 lines
1.5 KiB
TypeScript
const userPref = window.matchMedia("(prefers-color-scheme: light)").matches ? "light" : "dark"
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const currentTheme = localStorage.getItem("theme") ?? userPref
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document.documentElement.setAttribute("saved-theme", currentTheme)
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const emitThemeChangeEvent = (theme: "light" | "dark") => {
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const event: CustomEventMap["themechange"] = new CustomEvent("themechange", {
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detail: { theme },
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})
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document.dispatchEvent(event)
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}
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document.addEventListener("nav", () => {
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const switchTheme = (e: Event) => {
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const newTheme =
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document.documentElement.getAttribute("saved-theme") === "dark" ? "light" : "dark"
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document.documentElement.setAttribute("saved-theme", newTheme)
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localStorage.setItem("theme", newTheme)
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emitThemeChangeEvent(newTheme)
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}
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const themeChange = (e: MediaQueryListEvent) => {
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const newTheme = e.matches ? "dark" : "light"
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document.documentElement.setAttribute("saved-theme", newTheme)
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localStorage.setItem("theme", newTheme)
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emitThemeChangeEvent(newTheme)
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}
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for (const darkmodeButton of document.getElementsByClassName("darkmode")) {
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darkmodeButton.addEventListener("click", switchTheme)
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window.addCleanup(() => darkmodeButton.removeEventListener("click", switchTheme))
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}
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// Listen for changes in prefers-color-scheme
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const colorSchemeMediaQuery = window.matchMedia("(prefers-color-scheme: dark)")
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colorSchemeMediaQuery.addEventListener("change", themeChange)
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window.addCleanup(() => colorSchemeMediaQuery.removeEventListener("change", themeChange))
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})
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