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refactor(theme-common): allow optional desktopBreakpoint param in useWindowSize #9335

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Merged
slorber merged 16 commits into from
Dec 1, 2023
Merged

refactor(theme-common): allow optional desktopBreakpoint param in useWindowSize #9335

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9f90240
feat(theme-common): Get desktopThresholdWidth from docusaurus config,…
jgarrow Aug 25, 2023
c629834
Update example to dogfood custom desktopThresholdWidth
jgarrow Aug 25, 2023
d3feed9
Revert "Update example to dogfood custom desktopThresholdWidth"
jgarrow Aug 25, 2023
7bb3c9c
dogfooding: Add custom desktop breakpoint to theme config
jgarrow Aug 25, 2023
6535c04
Handle falsey value
jgarrow Aug 25, 2023
480684c
Update ThemeConfig type
jgarrow Aug 25, 2023
19f9abe
Allow optional desktopThresholdWidth param for useWindowSize hook
jgarrow Sep 8, 2023
18d0edb
Remove dogfooding from previous implementation
jgarrow Sep 21, 2023
18ace77
Change useWindowSize hook param to object
jgarrow Sep 25, 2023
0a09563
Update docs
jgarrow Sep 25, 2023
df7ffbf
Change arg shape for getWindowSize instead of useWindowSize
jgarrow Sep 25, 2023
9436389
Update useWindowSize docs as per feedback
jgarrow Oct 3, 2023
1584349
Merge branch 'main' into main
Josh-Cena Nov 24, 2023
63369d3
Use object param in the right place
Josh-Cena Nov 24, 2023
4f3ab26
Update website/docs/styling-layout.mdx
Josh-Cena Nov 24, 2023
c063b18
minor refactors
slorber Dec 1, 2023
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17 changes: 10 additions & 7 deletions packages/docusaurus-theme-common/src/hooks/useWindowSize.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -17,15 +17,14 @@ const windowSizes = {

type WindowSize = keyof typeof windowSizes;

const DesktopThresholdWidth = 996;

function getWindowSize() {
function getWindowSize(desktopThresholdWidth: number): WindowSize {
if (!ExecutionEnvironment.canUseDOM) {
throw new Error(
'getWindowSize() should only be called after React hydration',
);
}
return window.innerWidth > DesktopThresholdWidth

return window.innerWidth > desktopThresholdWidth
? windowSizes.desktop
: windowSizes.mobile;
}
Expand All @@ -40,7 +39,11 @@ function getWindowSize() {
* with mediaquery). We don't return `undefined` on purpose, to make it more
* explicit.
*/
export function useWindowSize(): WindowSize {
export function useWindowSize({
desktopThresholdWidth = 996,
}: {
desktopThresholdWidth?: number;
} = {}): WindowSize {
const [windowSize, setWindowSize] = useState<WindowSize>(
() =>
// super important to return a constant value to avoid hydration mismatch
Expand All @@ -50,7 +53,7 @@ export function useWindowSize(): WindowSize {

useEffect(() => {
function updateWindowSize() {
setWindowSize(getWindowSize());
setWindowSize(getWindowSize({desktopThresholdWidth}));
}

updateWindowSize();
Expand All @@ -60,7 +63,7 @@ export function useWindowSize(): WindowSize {
return () => {
window.removeEventListener('resize', updateWindowSize);
};
}, []);
}, [desktopThresholdWidth]);

return windowSize;
}
6 changes: 6 additions & 0 deletions website/docs/styling-layout.mdx
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Expand Up @@ -180,6 +180,12 @@ Docusaurus uses `996px` as the cutoff between mobile screen width and desktop. I
}
```

:::tip Customizing the breakpoint

Some React components, such as the header and the sidebar, implement different JavaScript logic when in mobile view by calling the [`useWindowSize`](./swizzling.mdx) hook. If you change the breakpoint value in your custom CSS, you probably also want to update the invocations of the `useWindowSize` hook by swizzling the components it's used in and passing an explicit option argument. For example, to change the breakpoint to 796px, pass the argument `796` to the `useWindowSize` hook.

:::
Comment on lines 183 to 187
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@slorber slorber Oct 5, 2023

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@Josh-Cena to be honest I'm not sure we want to document this

@theme-common has many APIs and we only document a few ones that are meant to be used in userland explicitly. Even if this is considered "public API" and we want to avoid breaking changes on it, it doesn't mean we should document it IMHO.

If power users want to customize breakpoints and retro-engineer our helpers and want to use it, fine (although as I said you can provide your own code as well). But do we want to encourage usage, I'm not sure at all.

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@Josh-Cena Josh-Cena Nov 24, 2023

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If we mention customizing the CSS break point, we definitely need to mention customizing the JS break point. Users creating custom components (maybe through swizzling) always need to know both.


## CSS modules {#css-modules}

To style your components using [CSS Modules](https://github.com/css-modules/css-modules), name your stylesheet files with the `.module.css` suffix (e.g. `welcome.module.css`). Webpack will load such CSS files as CSS modules and you have to reference the class names as properties of the imported CSS module (as opposed to using plain strings). This is similar to the convention used in [Create React App](https://facebook.github.io/create-react-app/docs/adding-a-css-modules-stylesheet).
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