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* dark probe * fix tests --------- Co-authored-by: Philippe Rivière <fil@rezo.net>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,18 +1,28 @@ | ||
| import {observe} from "./observe.js"; | ||
|
|
||
| // Watches dark mode based on theme and user preference. | ||
| // TODO: in preview, also watch for changes in the theme meta. | ||
| export function dark() { | ||
| return observe((notify: (dark: boolean) => void) => { | ||
| let dark: boolean | undefined; | ||
| const media = matchMedia("(prefers-color-scheme: dark)"); | ||
| const probe = document.createElement("div"); | ||
| probe.style.transitionProperty = "color, background-color"; | ||
| probe.style.transitionDuration = "1ms"; | ||
| const changed = () => { | ||
| const d = getComputedStyle(document.body).getPropertyValue("color-scheme") === "dark"; | ||
| const s = getComputedStyle(document.body).getPropertyValue("color-scheme").split(/\s+/); | ||
| let d: boolean; | ||
| if (s.includes("light") && s.includes("dark")) d = media.matches; | ||
| else d = s.includes("dark"); | ||
| if (dark === d) return; // only notify if changed | ||
| notify((dark = d)); | ||
| }; | ||
| document.body.appendChild(probe); | ||
| changed(); | ||
| probe.addEventListener("transitionstart", changed); | ||
| media.addEventListener("change", changed); | ||
| return () => media.removeEventListener("change", changed); | ||
| return () => { | ||
| probe.removeEventListener("transitionstart", changed); | ||
| media.removeEventListener("change", changed); | ||
| }; | ||
| }); | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1 +1 @@ | ||
| import "../_observablehq/stdlib/inputs.00000006.js"; | ||
| import "../_observablehq/stdlib/inputs.00000005.js"; |
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