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addEventListener("load", onLoad); | ||
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function toggleElem() { | ||
return document.getElementById("theme-toggle"); | ||
} | ||
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function menuElem() { | ||
return document.getElementById("menu"); | ||
} | ||
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function onLoad() { | ||
const systemInitiatedDark = window.matchMedia("(prefers-color-scheme: dark)"); | ||
const defaultTheme = systemInitiatedDark.matches ? "dark" : "light"; | ||
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// This checks for local storage telling to override the system preferences | ||
let currentTheme = localStorage.getItem("theme"); | ||
if (!currentTheme) { | ||
currentTheme = defaultTheme; | ||
} | ||
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setTheme(currentTheme); | ||
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toggleElem().addEventListener("click", onThemeClick); | ||
menuElem().addEventListener("click", onMenuClick); | ||
systemInitiatedDark.addEventListener("change", onPreferColorSchemeChange); | ||
} | ||
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function setTheme(theme) { | ||
const lightElem = "<span class=\"svg-icon\"><svg viewBox=\"0 0 512 512\" width=\"18\" height=\"18\"><use href=\"#sun\"></use></svg> </span><span class=\"u-underline\">Theme</span>"; | ||
const darkElem = "<span class=\"svg-icon\"><svg viewBox=\"0 0 512 512\" width=\"18\" height=\"18\"><use href=\"#moon\"></use></svg> </span><span class=\"u-underline\">Theme</span>"; | ||
document.documentElement.setAttribute("data-theme", theme); | ||
if (theme === "dark") { | ||
toggleElem().innerHTML = lightElem; | ||
} | ||
else { | ||
toggleElem().innerHTML = darkElem; | ||
} | ||
localStorage.setItem("theme", theme); | ||
} | ||
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function onMenuClick() { | ||
const x = document.getElementById("top-nav-toc"); | ||
if (x.style.display !== "block") { | ||
x.style.display = "block"; | ||
} else { | ||
x.style.display = "none"; | ||
} | ||
} | ||
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function onPreferColorSchemeChange(e) { | ||
if (e.matches) { | ||
setTheme("dark"); | ||
} else { | ||
setTheme("light"); | ||
} | ||
} | ||
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function onThemeClick() { | ||
const currentTheme = localStorage.getItem("theme"); | ||
if (currentTheme === "dark") { | ||
setTheme("light"); | ||
} else if (currentTheme === "light") { | ||
setTheme("dark"); | ||
} else { | ||
setTheme("light"); | ||
} | ||
} |
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