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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,147 @@ | ||
| import Image from 'next/image'; | ||
| import clsx from 'classnames'; | ||
| import { HTMLAttributes, useCallback, useState } from 'react'; | ||
| import React from 'react'; | ||
|
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| export type ImgPlaceholder = string; | ||
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| const VALID_LAYOUT_VALUES = ['fill', 'fixed', 'intrinsic', 'responsive', undefined] as const; | ||
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| type LayoutValue = typeof VALID_LAYOUT_VALUES[number]; | ||
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| const VALID_LOADING_VALUES = ['lazy', 'eager', undefined] as const; | ||
| type LoadingValue = typeof VALID_LOADING_VALUES[number]; | ||
| type ImgElementStyle = NonNullable<JSX.IntrinsicElements['img']['style']>; | ||
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| export type ImgProps = (Omit< | ||
| JSX.IntrinsicElements['img'], | ||
| 'src' | 'srcSet' | 'ref' | 'width' | 'height' | 'loading' | 'style' | ||
| > & { | ||
| src: string; | ||
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| fadeIn?: boolean; | ||
| durationFadeIn?: number; | ||
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| placeholder: ImgPlaceholder; | ||
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| placeholderProps?: HTMLAttributes<HTMLImageElement>; | ||
| containerProps?: HTMLAttributes<HTMLDivElement>; | ||
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| quality?: number | string; | ||
| priority?: boolean; | ||
| loading?: LoadingValue; | ||
| unoptimized?: boolean; | ||
| objectFit?: ImgElementStyle['objectFit']; | ||
| objectPosition?: ImgElementStyle['objectPosition']; | ||
| }) & | ||
| ( | ||
| | { | ||
| width?: never; | ||
| height?: never; | ||
| layout: 'fill'; | ||
| } | ||
| | { | ||
| width: number | string; | ||
| height: number | string; | ||
| layout?: Exclude<LayoutValue, 'fill'>; | ||
| } | ||
| ); | ||
|
|
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| const Img: React.FC<ImgProps> = ({ | ||
| src, | ||
| width, | ||
| height, | ||
| layout = 'intrinsic', | ||
| fadeIn = true, | ||
| durationFadeIn = 500, | ||
| placeholder, | ||
| containerProps, | ||
| placeholderProps, | ||
| ...rest | ||
| }) => { | ||
| const [imgLoaded, setImgLoaded] = useState(false); | ||
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| const shouldReveal = !fadeIn || imgLoaded; | ||
| const shouldFadeIn = fadeIn; // && imgLoaded; | ||
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| const imageStyle = { | ||
| opacity: shouldReveal ? 1 : 0, | ||
| transition: shouldFadeIn ? `opacity ${durationFadeIn}ms ease 0s` : `none`, | ||
| // transition: shouldFadeIn ? `opacity ${durationFadeIn}ms` : `none`, | ||
| // ...imgStyle | ||
| }; | ||
|
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| const delayHideStyle = { transitionDelay: `${durationFadeIn}ms` }; | ||
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| const imagePlaceholderStyle = { | ||
| // opacity: imgLoaded ? 0 : 1, | ||
| // transition: `opacity ${durationFadeIn}ms`, | ||
| // transitionDelay: `${durationFadeIn}ms`, | ||
| // ...(shouldFadeIn && delayHideStyle), | ||
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| filter: 'blur(12px)', | ||
| transform: 'scale(1.2)', | ||
| ...placeholderProps?.style, | ||
| }; | ||
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| const imageContainer = layout === 'intrinsic' ? { className: 'flex' } : {}; | ||
|
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| const onLoad = useCallback((event) => { | ||
| // https://github.com/vercel/next.js/discussions/18386 | ||
|
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| if (event.target.srcset) { | ||
| // Image is ready | ||
| setImgLoaded(true); | ||
| if (rest.onLoad) rest.onLoad(event); | ||
| } | ||
| }, []); | ||
|
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| return ( | ||
| <div | ||
| {...containerProps} | ||
| className={clsx( | ||
| containerProps?.className, | ||
| 'relative', | ||
| layout === 'intrinsic' ? 'inline-block' : 'block', | ||
| 'overflow-hidden', | ||
| )} | ||
| > | ||
| {placeholder && ( | ||
| <img | ||
| {...placeholderProps} | ||
| aria-hidden="true" | ||
| alt="" | ||
| src={placeholder} | ||
| className={clsx( | ||
| placeholderProps?.className, | ||
| 'absolute', | ||
| 'inset-0', | ||
| 'w-full', | ||
| 'h-full', | ||
| 'object-cover', | ||
| 'object-center', | ||
| )} | ||
| style={imagePlaceholderStyle} | ||
| /> | ||
| )} | ||
|
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| <div style={imageStyle} {...imageContainer}> | ||
| {layout !== 'fill' ? ( | ||
| <Image | ||
| {...rest} | ||
| className={clsx(rest.className, 'block')} | ||
| src={src} | ||
| width={width} | ||
| height={height} | ||
| layout={layout} | ||
| onLoad={onLoad} | ||
| /> | ||
| ) : ( | ||
| <Image {...rest} src={src} layout={layout} onLoad={onLoad} /> | ||
| )} | ||
| </div> | ||
| </div> | ||
| ); | ||
| }; | ||
|
|
||
| export default Img; |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,15 @@ | ||
| import fs from 'fs'; | ||
| import { promisify } from 'util'; | ||
| import path from 'path'; | ||
| import { getBase64 } from '@plaiceholder/base64'; | ||
|
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| export type ImgPlaceholder = string; | ||
|
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| export async function generatePlaceholder(imgPath: string): Promise<ImgPlaceholder> { | ||
| const image = await promisify(fs.readFile)(path.join(process.cwd(), 'public', imgPath)); | ||
|
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| // optimize using data uri thing? | ||
| const base64 = await getBase64(image); | ||
|
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| return base64; | ||
| } |
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