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76 lines
2.8 KiB
TypeScript
76 lines
2.8 KiB
TypeScript
import NextImage from "next/image";
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import Link from "../Link";
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import { styled, theme } from "../../lib/styles/stitches.config";
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import type { ComponentPropsWithoutRef } from "react";
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import type { ImageProps as NextImageProps, StaticImageData } from "next/image";
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const DEFAULT_QUALITY = 60;
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const DEFAULT_WIDTH = Number.parseInt(theme.sizes.maxLayoutWidth.value, 10); // see lib/styles/stitches.config.ts
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const Block = styled("div", {
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display: "block",
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lineHeight: 0,
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// default to centering all images
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margin: "1em auto",
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textAlign: "center",
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});
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const StyledImage = styled(NextImage, {
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height: "auto",
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maxWidth: "100%",
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borderRadius: theme.radii.corner,
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});
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export type ImageProps = ComponentPropsWithoutRef<typeof StyledImage> & {
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href?: string; // optionally wrap image in a link
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inline?: boolean; // don't wrap everything in a `<div>` block
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};
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const Image = ({ src, width, height, quality = DEFAULT_QUALITY, placeholder, href, inline, ...rest }: ImageProps) => {
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const imageProps: NextImageProps = {
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// strip "px" from dimensions: https://stackoverflow.com/a/4860249/1438024
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width: typeof width === "string" ? Number.parseInt(width, 10) : width,
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height: typeof height === "string" ? Number.parseInt(height, 10) : height,
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quality,
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src,
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placeholder,
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...rest,
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};
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if (typeof src === "object" && (src as StaticImageData).src !== undefined) {
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const staticImg = src as StaticImageData;
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// all data for statically imported images is extracted from the object itself.
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imageProps.src = staticImg;
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// set image width to max layout width; height is calculated automatically via aspect ratio:
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// https://github.com/vercel/next.js/pull/40278
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imageProps.width = staticImg.width > DEFAULT_WIDTH ? DEFAULT_WIDTH : imageProps.width;
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// default to blur placeholder while loading if it's been generated for us.
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imageProps.placeholder = placeholder || (staticImg.blurDataURL !== undefined ? "blur" : "empty");
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} else if (typeof src === "string") {
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// regular path to a file was passed in, which makes explicit width and height required.
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// https://nextjs.org/docs/api-reference/next/future/image#width
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if (!(width && height)) {
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throw new Error("'width' and 'height' are required for non-statically imported images.");
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}
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// optionally prepending src with "/public" makes images resolve properly in GitHub markdown previews, etc.
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imageProps.src = src.replace(/^\/public/g, "");
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} else {
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throw new TypeError("'src' should be a string or a valid StaticImageData object.");
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}
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const StyledImageWithProps = href ? (
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<Link href={href} underline={false}>
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<StyledImage {...imageProps} />
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</Link>
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) : (
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<StyledImage {...imageProps} />
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);
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return inline ? StyledImageWithProps : <Block>{StyledImageWithProps}</Block>;
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};
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export default Image;
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