62 lines
1.8 KiB
JavaScript
62 lines
1.8 KiB
JavaScript
(() => {
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/* DOM */
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const bodyClass = document.body.classList
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const entry = document.getElementsByTagName("textarea")[0]
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const titleDOM = document.getElementsByTagName("h1")[0]
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/* localStorage management */
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const lsn = "~ddb:" // localStorage namespace
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const getPref = (pref) => localStorage.getItem(lsn + pref)
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const getPrefs = () => ({
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prefForce: getPref("force") === "true",
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prefTheme: getPref("theme") || "dark",
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})
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/* Update the state of the document based on client preferences. */
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const renderPreferences = () => {
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const { prefForce, prefTheme } = getPrefs()
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if(prefForce) {
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bodyClass.add(prefTheme)
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}
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}
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renderPreferences()
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/* Display the title. */
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const setTitle = (title) => {
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if(title) {
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titleDOM.childNodes.forEach(child => child.remove())
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titleDOM.append(document.createTextNode(title))
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document.title = title
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}
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}
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/* Update title based on the document fragment. */
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const hashchangeHandler = () => {
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const here = new URL(window.location.href)
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const title = decodeURI(here.hash.slice(1))
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const updated = setTitle(title)
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entry.value = title
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}
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/* Update the title on page load */
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hashchangeHandler()
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/* and any time the hash changes, eg. when using the back button. */
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addEventListener("hashchange", hashchangeHandler)
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/* Add a way to easily edit the title. */
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const checkKey = (evt) => {
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const code = evt.code
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if(code === "Escape") {
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entry.classList.toggle("hidden")
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const title = entry.value
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setTitle(title)
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if(entry.classList.contains("hidden")) {
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const here = new URL(window.location.href)
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here.hash = `#${encodeURI(title)}`
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history.pushState({}, "", here)
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}
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}
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}
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document.addEventListener("keyup", checkKey)
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})()
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