Add docs for pages

Aditya Thakral 10 months ago
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# Pages
All pages are a separate React component in our repository, under the [pages](../pages) folder. This is a [special directory](https://nextjs.org/docs/tag/v11.0.0/basic-features/pages) used by Next.js which maps a React component exported from this directory to a page on a url.
The React component exported by these files are wrapped by the [`App` component](../pages/_app.tsx). This lets us reuse code in between pages which makes it a good place to render the [navbar](../components/Navbar.tsx), [footer](../components/Footer.tsx), [background shapes](../components/ShapesBackground.tsx), and the general css layout of a page.
## Layout
Most pages are wrapped with the [`DefaultLayout`](../components/DefaultLayout.tsx) component which limits the page width and adds the necessary margins and paddings. However, some pages need to override these default styles to accomodate for their specific design. For example:
- The [home page](../pages/index.tsx) is wider than all the other pages.
- The [about us](../pages/about/index.tsx) needs the entire screen width to properly render the bubbles.
We have an opt-in model for using a custom layout for pages. This is enabled by the static `Layout` function on a React component for a page.
### Example
```tsx
function PageXYZ() {
return <p>I am a page</p>
}
// If we want this page to use a custom layout, we can add a static `Layout` function to it.
PageXYZ.Layout = PageXYZLayout(props: { children: React.ReactNode }) {
return <div className={styles.customLayoutStyles}>{props.children}</div>;
}
```
It is extremely important to return `props.children` as part of the JSX because this contains the entire page. If you fail to return it, the page will **not** show up.
Note that this functionality is **not** a part of Next.js. We take advantage of static properties in the [_app.tsx](../pages/_app.tsx#L30) file to implement this.
## Shapes Background
Just like the static `Layout` function, we use another static function on React pages called `getShapesConfig`. Most pages use the [default config](../components/ShapesBackground.tsx#L188) which positions shapes randomly on the page. Some pages require a little artistic nudge or even hardcoding the shapes to appear in certain locations.
Pages like the [home page](../pages/index.tsx) can use the `getShapesConfig` function to customize what shapes they want the page to render.
### Example 1
```tsx
import { GetShapesConfig } from "@/components/ShapesBackground";
PageXYZ.getShapesConfig = (() => {
// I ONLY LIKE DOTS AND WAVES!!!!
return {
dots: [
{
// These map to CSS properties. You don't have to use all of them. Use just the ones that you want.
top: "calc(0.06 * (580rem / 0.65) / 16)",
right: "90vw",
width: "calc(168rem / 16)",
height: "calc(204rem / 16)",
filter: "var(--teal)",
opacity: "25%",
}
],
waves: [
{
top: "calc(0.5 * (580rem / 0.65) / 16)",
left: "24vw",
width: "calc(116rem / 16)",
height: "calc(58rem / 16)",
filter: "var(--teal)",
},
]
}
}) as GetShapesConfig
```
Note that background shapes are not rendered into html files during build time because it is impossible to know the window dimensions. This means that you can safely use `window.innerWidth` and `window.innerHeight` as well use the width and height of the shapes container inside the `getShapesConfig` function to change the shapes based on size of the screen.
### Example 2
```tsx
import { GetShapesConfig } from "@/components/ShapesBackground";
PageXYZ.getShapesConfig = ((containerWidth, containerHeight) => {
// I like dots on desktops
if (window.innerWidth >= 768) {
return {
dots: [
{
// These map to CSS properties. You don't have to use all of them. Use just the ones that you want.
top: "calc(0.06 * (580rem / 0.65) / 16)",
right: "90vw",
width: "calc(168rem / 16)",
height: "calc(204rem / 16)",
filter: "var(--teal)",
opacity: "25%",
}
],
}
}
// but waves on phones and tables
else {
return {
waves: [
{
top: "calc(0.5 * (580rem / 0.65) / 16)",
left: "24vw",
width: "calc(116rem / 16)",
height: "calc(58rem / 16)",
filter: "var(--teal)",
},
]
}
}
}) as GetShapesConfig
```
As with the `Layout` function, this is **not** a part of Next.js. We take advantage of static properties in the [_app.tsx](../pages/_app.tsx#L51) file to implement this.
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