<Image>
Examples
Good to know: If you are using a version of Next.js prior to 13, you'll want to use the next/legacy/image documentation since the component was renamed.
This API reference will help you understand how to use props and configuration options available for the Image Component. For features and usage, please see the Image Component page.
import Image from 'next/image'
export default function Page() {
return (
<Image
src="/profile.png"
width={500}
height={500}
alt="Picture of the author"
/>
)
}
Props
Here's a summary of the props available for the Image Component:
Prop | Example | Type | Status |
---|---|---|---|
src | src="/profile.png" | String | Required |
width | width={500} | Integer (px) | Required |
height | height={500} | Integer (px) | Required |
alt | alt="Picture of the author" | String | Required |
loader | loader={imageLoader} | Function | - |
fill | fill={true} | Boolean | - |
sizes | sizes="(max-width: 768px) 100vw, 33vw" | String | - |
quality | quality={80} | Integer (1-100) | - |
priority | priority={true} | Boolean | - |
placeholder | placeholder="blur" | String | - |
style | style={{objectFit: "contain"}} | Object | - |
onLoadingComplete | onLoadingComplete={img => done())} | Function | Deprecated |
onLoad | onLoad={event => done())} | Function | - |
onError | onError(event => fail()} | Function | - |
loading | loading="lazy" | String | - |
blurDataURL | blurDataURL="data:image/jpeg..." | String | - |
overrideSrc | overrideSrc="/seo.png" | String | - |
Required Props
The Image Component requires the following properties: src
, alt
, width
and height
(or fill
).
import Image from 'next/image'
export default function Page() {
return (
<div>
<Image
src="/profile.png"
width={500}
height={500}
alt="Picture of the author"
/>
</div>
)
}
src
Must be one of the following:
- A statically imported image file
- A path string. This can be either an absolute external URL, or an internal path depending on the loader prop.
When using the default loader, also consider the following for source images:
- When src is an external URL, you must also configure remotePatterns
- When src is animated or not a known format (JPEG, PNG, WebP, AVIF, GIF, TIFF) the image will be served as-is
- When src is SVG format, it will be blocked unless
unoptimized
ordangerouslyAllowSVG
is enabled
width
The width
property represents the intrinsic image width in pixels. This property is used to infer the correct aspect ratio of the image and avoid layout shift during loading. It does not determine the rendered size of the image, which is controlled by CSS, similar to the width
attribute in the HTML <img>
tag.
Required, except for statically imported images or images with the fill
property.
height
The height
property represents the intrinsic image height in pixels. This property is used to infer the correct aspect ratio of the image and avoid layout shift during loading. It does not determine the rendered size of the image, which is controlled by CSS, similar to the height
attribute in the HTML <img>
tag.
Required, except for statically imported images or images with the fill
property.
Good to know:
- Combined, both
width
andheight
properties are used to determine the aspect ratio of the image which used by browsers to reserve space for the image before it loads.- The intrinsic size does not always mean the rendered size in the browser, which will be determined by the parent container. For example, if the parent container is smaller than the intrinsic size, the image will be scaled down to fit the container.
- You can use the
fill
property when the width and height are unknown.
alt
The alt
property is used to describe the image for screen readers and search engines. It is also the fallback text if images have been disabled or an error occurs while loading the image.
It should contain text that could replace the image without changing the meaning of the page. It is not meant to supplement the image and should not repeat information that is already provided in the captions above or below the image.
If the image is purely decorative or not intended for the user, the alt
property should be an empty string (alt=""
).
Optional Props
The <Image />
component accepts a number of additional properties beyond those which are required. This section describes the most commonly-used properties of the Image component. Find details about more rarely-used properties in the Advanced Props section.
loader
A custom function used to resolve image URLs.
A loader
is a function returning a URL string for the image, given the following parameters:
Here is an example of using a custom loader:
import Image from 'next/image'
const imageLoader = ({ src, width, quality }) => {
return `https://example.com/${src}?w=${width}&q=${quality || 75}`
}
export default function Page() {
return (
<Image
loader={imageLoader}
src="me.png"
alt="Picture of the author"
width={500}
height={500}
/>
)
}
Alternatively, you can use the loaderFile configuration in next.config.js
to configure every instance of next/image
in your application, without passing a prop.
fill
fill={true} // {true} | {false}
A boolean that causes the image to fill the parent element, which is useful when the width
and height
are unknown.
The parent element must assign position: "relative"
, position: "fixed"
, or position: "absolute"
style.
By default, the img element will automatically be assigned the position: "absolute"
style.
If no styles are applied to the image, the image will stretch to fit the container. You may prefer to set object-fit: "contain"
for an image which is letterboxed to fit the container and preserve aspect ratio.
Alternatively, object-fit: "cover"
will cause the image to fill the entire container and be cropped to preserve aspect ratio.
For more information, see also:
sizes
A string, similar to a media query, that provides information about how wide the image will be at different breakpoints. The value of sizes
will greatly affect performance for images using fill
or which are styled to have a responsive size.
The sizes
property serves two important purposes related to image performance:
- First, the value of
sizes
is used by the browser to determine which size of the image to download, fromnext/image
's automatically generatedsrcset
. When the browser chooses, it does not yet know the size of the image on the page, so it selects an image that is the same size or larger than the viewport. Thesizes
property allows you to tell the browser that the image will actually be smaller than full screen. If you don't specify asizes
value in an image with thefill
property, a default value of100vw
(full screen width) is used. - Second, the
sizes
property changes the behavior of the automatically generatedsrcset
value. If nosizes
value is present, a smallsrcset
is generated, suitable for a fixed-size image (1x/2x/etc). Ifsizes
is defined, a largesrcset
is generated, suitable for a responsive image (640w/750w/etc). If thesizes
property includes sizes such as50vw
, which represent a percentage of the viewport width, then thesrcset
is trimmed to not include any values which are too small to ever be necessary.
For example, if you know your styling will cause an image to be full-width on mobile devices, in a 2-column layout on tablets, and a 3-column layout on desktop displays, you should include a sizes property such as the following:
import Image from 'next/image'
export default function Page() {
return (
<div className="grid-element">
<Image
fill
src="/example.png"
sizes="(max-width: 768px) 100vw, (max-width: 1200px) 50vw, 33vw"
/>
</div>
)
}
This example sizes
could have a dramatic effect on performance metrics. Without the 33vw
sizes, the image selected from the server would be 3 times as wide as it needs to be. Because file size is proportional to the square of the width, without sizes
the user would download an image that's 9 times larger than necessary.
Learn more about srcset
and sizes
:
quality
quality={75} // {number 1-100}
The quality of the optimized image, an integer between 1
and 100
, where 100
is the best quality and therefore largest file size. Defaults to 75
.
priority
priority={false} // {false} | {true}
When true, the image will be considered high priority and
preload. Lazy loading is automatically disabled for images using priority
. If the loading
property is also used and set to lazy
, the priority
property can't be used. The loading
property is only meant for advanced use cases. Remove loading
when priority
is needed.
You should use the priority
property on any image detected as the Largest Contentful Paint (LCP) element. It may be appropriate to have multiple priority images, as different images may be the LCP element for different viewport sizes.
Should only be used when the image is visible above the fold. Defaults to false
.
placeholder
placeholder = 'empty' // "empty" | "blur" | "data:image/..."
A placeholder to use while the image is loading. Possible values are blur
, empty
, or data:image/...
. Defaults to empty
.
When blur
, the blurDataURL
property will be used as the placeholder. If src
is an object from a static import and the imported image is .jpg
, .png
, .webp
, or .avif
, then blurDataURL
will be automatically populated, except when the image is detected to be animated.
For dynamic images, you must provide the blurDataURL
property. Solutions such as Plaiceholder can help with base64
generation.
When data:image/...
, the Data URL will be used as the placeholder while the image is loading.
When empty
, there will be no placeholder while the image is loading, only empty space.
Try it out:
- Demo the
blur
placeholder - Demo the shimmer effect with data URL
placeholder
prop - Demo the color effect with
blurDataURL
prop
Advanced Props
In some cases, you may need more advanced usage. The <Image />
component optionally accepts the following advanced properties.
style
Allows passing CSS styles to the underlying image element.
const imageStyle = {
borderRadius: '50%',
border: '1px solid #fff',
}
export default function ProfileImage() {
return <Image src="..." style={imageStyle} />
}
Remember that the required width and height props can interact with your styling. If you use styling to modify an image's width, you should also style its height to auto
to preserve its intrinsic aspect ratio, or your image will be distorted.
onLoadingComplete
<Image onLoadingComplete={(img) => console.log(img.naturalWidth)} />
Warning: Deprecated since Next.js 14 in favor of
onLoad
.
A callback function that is invoked once the image is completely loaded and the placeholder has been removed.
The callback function will be called with one argument, a reference to the underlying <img>
element.
onLoad
<Image onLoad={(e) => console.log(e.target.naturalWidth)} />
A callback function that is invoked once the image is completely loaded and the placeholder has been removed.
The callback function will be called with one argument, the Event which has a target
that references the underlying <img>
element.
onError
<Image onError={(e) => console.error(e.target.id)} />
A callback function that is invoked if the image fails to load.
loading
loading = 'lazy' // {lazy} | {eager}
The loading behavior of the image. Defaults to lazy
.
When lazy
, defer loading the image until it reaches a calculated distance from
the viewport.
When eager
, load the image immediately.
Learn more about the loading
attribute.
blurDataURL
A Data URL to
be used as a placeholder image before the src
image successfully loads. Only takes effect when combined
with placeholder="blur"
.
Must be a base64-encoded image. It will be enlarged and blurred, so a very small image (10px or less) is recommended. Including larger images as placeholders may harm your application performance.
Try it out:
You can also generate a solid color Data URL to match the image.
unoptimized
unoptimized = {false} // {false} | {true}
When true, the source image will be served as-is instead of changing quality,
size, or format. Defaults to false
.
import Image from 'next/image'
const UnoptimizedImage = (props) => {
return <Image {...props} unoptimized />
}
Since Next.js 12.3.0, this prop can be assigned to all images by updating next.config.js
with the following configuration:
module.exports = {
images: {
unoptimized: true,
},
}
overrideSrc
When providing the src
prop to the <Image>
component, both the srcset
and src
attributes are generated automatically for the resulting <img>
.
<Image src="/me.jpg" />
<img
srcset="
/_next/image?url=%2Fme.jpg&w=640&q=75 1x,
/_next/image?url=%2Fme.jpg&w=828&q=75 2x
"
src="/_next/image?url=%2Fme.jpg&w=828&q=75"
/>
In some cases, it is not desirable to have the src
attribute generated and you may wish to override it using the overrideSrc
prop.
For example, when upgrading an existing website from <img>
to <Image>
, you may wish to maintain the same src
attribute for SEO purposes such as image ranking or avoiding recrawl.
<Image src="/me.jpg" overrideSrc="/override.jpg" />
<img
srcset="
/_next/image?url=%2Fme.jpg&w=640&q=75 1x,
/_next/image?url=%2Fme.jpg&w=828&q=75 2x
"
src="/override.jpg"
/>
decoding
A hint to the browser indicating if it should wait for the image to be decoded before presenting other content updates or not. Defaults to async
.
Possible values are the following:
async
- Asynchronously decode the image and allow other content to be rendered before it completes.sync
- Synchronously decode the image for atomic presentation with other content.auto
- No preference for the decoding mode; the browser decides what's best.
Learn more about the decoding
attribute.
Other Props
Other properties on the <Image />
component will be passed to the underlying
img
element with the exception of the following:
srcSet
. Use Device Sizes instead.
Configuration Options
In addition to props, you can configure the Image Component in next.config.js
. The following options are available:
localPatterns
You can optionally configure localPatterns
in your next.config.js
file in order to allow specific paths to be optimized and block all others paths.
module.exports = {
images: {
localPatterns: [
{
pathname: '/assets/images/**',
search: '',
},
],
},
}
Good to know: The example above will ensure the
src
property ofnext/image
must start with/assets/images/
and must not have a query string. Attempting to optimize any other path will respond with 400 Bad Request.
remotePatterns
To protect your application from malicious users, configuration is required in order to use external images. This ensures that only external images from your account can be served from the Next.js Image Optimization API. These external images can be configured with the remotePatterns
property in your next.config.js
file, as shown below:
module.exports = {
images: {
remotePatterns: [
{
protocol: 'https',
hostname: 'example.com',
port: '',
pathname: '/account123/**',
search: '',
},
],
},
}
Good to know: The example above will ensure the
src
property ofnext/image
must start withhttps://example.com/account123/
and must not have a query string. Any other protocol, hostname, port, or unmatched path will respond with 400 Bad Request.
Below is an example of the remotePatterns
property in the next.config.js
file using a wildcard pattern in the hostname
:
module.exports = {
images: {
remotePatterns: [
{
protocol: 'https',
hostname: '**.example.com',
port: '',
search: '',
},
],
},
}
Good to know: The example above will ensure the
src
property ofnext/image
must start withhttps://img1.example.com
orhttps://me.avatar.example.com
or any number of subdomains. It cannot have a port or query string. Any other protocol or unmatched hostname will respond with 400 Bad Request.
Wildcard patterns can be used for both pathname
and hostname
and have the following syntax:
*
match a single path segment or subdomain**
match any number of path segments at the end or subdomains at the beginning
The **
syntax does not work in the middle of the pattern.
Good to know: When omitting
protocol
,port
,pathname
, orsearch
then the wildcard**
is implied. This is not recommended because it may allow malicious actors to optimize urls you did not intend.
Below is an example of the remotePatterns
property in the next.config.js
file using search
:
module.exports = {
images: {
remotePatterns: [
{
protocol: 'https',
hostname: 'assets.example.com',
search: '?v=1727111025337',
},
],
},
}
Good to know: The example above will ensure the
src
property ofnext/image
must start withhttps://assets.example.com
and must have the exact query string?v=1727111025337
. Any other protocol or query string will respond with 400 Bad Request.
domains
Warning: Deprecated since Next.js 14 in favor of strict
remotePatterns
in order to protect your application from malicious users. Only usedomains
if you own all the content served from the domain.
Similar to remotePatterns
, the domains
configuration can be used to provide a list of allowed hostnames for external images.
However, the domains
configuration does not support wildcard pattern matching and it cannot restrict protocol, port, or pathname.
Below is an example of the domains
property in the next.config.js
file:
module.exports = {
images: {
domains: ['assets.acme.com'],
},
}
loaderFile
If you want to use a cloud provider to optimize images instead of using the Next.js built-in Image Optimization API, you can configure the loaderFile
in your next.config.js
like the following:
module.exports = {
images: {
loader: 'custom',
loaderFile: './my/image/loader.js',
},
}
This must point to a file relative to the root of your Next.js application. The file must export a default function that returns a string, for example:
export default function myImageLoader({ src, width, quality }) {
return `https://example.com/${src}?w=${width}&q=${quality || 75}`
}
Alternatively, you can use the loader
prop to configure each instance of next/image
.
Examples:
Advanced
The following configuration is for advanced use cases and is usually not necessary. If you choose to configure the properties below, you will override any changes to the Next.js defaults in future updates.
deviceSizes
If you know the expected device widths of your users, you can specify a list of device width breakpoints using the deviceSizes
property in next.config.js
. These widths are used when the next/image
component uses sizes
prop to ensure the correct image is served for user's device.
If no configuration is provided, the default below is used.
module.exports = {
images: {
deviceSizes: [640, 750, 828, 1080, 1200, 1920, 2048, 3840],
},
}
imageSizes
You can specify a list of image widths using the images.imageSizes
property in your next.config.js
file. These widths are concatenated with the array of device sizes to form the full array of sizes used to generate image srcsets.
The reason there are two separate lists is that imageSizes is only used for images which provide a sizes
prop, which indicates that the image is less than the full width of the screen. Therefore, the sizes in imageSizes should all be smaller than the smallest size in deviceSizes.
If no configuration is provided, the default below is used.
module.exports = {
images: {
imageSizes: [16, 32, 48, 64, 96, 128, 256, 384],
},
}
formats
The default Image Optimization API will automatically detect the browser's supported image formats via the request's Accept
header in order to determine the best output format.
If the Accept
header matches more than one of the configured formats, the first match in the array is used. Therefore, the array order matters. If there is no match (or the source image is animated), the Image Optimization API will fallback to the original image's format.
If no configuration is provided, the default below is used.
module.exports = {
images: {
formats: ['image/webp'],
},
}
You can enable AVIF support and still fallback to WebP with the following configuration.
module.exports = {
images: {
formats: ['image/avif', 'image/webp'],
},
}
Good to know:
- AVIF generally takes 50% longer to encode but it compresses 20% smaller compared to WebP. This means that the first time an image is requested, it will typically be slower and then subsequent requests that are cached will be faster.
- If you self-host with a Proxy/CDN in front of Next.js, you must configure the Proxy to forward the
Accept
header.
Caching Behavior
The following describes the caching algorithm for the default loader. For all other loaders, please refer to your cloud provider's documentation.
Images are optimized dynamically upon request and stored in the <distDir>/cache/images
directory. The optimized image file will be served for subsequent requests until the expiration is reached. When a request is made that matches a cached but expired file, the expired image is served stale immediately. Then the image is optimized again in the background (also called revalidation) and saved to the cache with the new expiration date.
The cache status of an image can be determined by reading the value of the x-nextjs-cache
response header. The possible values are the following:
MISS
- the path is not in the cache (occurs at most once, on the first visit)STALE
- the path is in the cache but exceeded the revalidate time so it will be updated in the backgroundHIT
- the path is in the cache and has not exceeded the revalidate time
The expiration (or rather Max Age) is defined by either the minimumCacheTTL
configuration or the upstream image Cache-Control
header, whichever is larger. Specifically, the max-age
value of the Cache-Control
header is used. If both s-maxage
and max-age
are found, then s-maxage
is preferred. The max-age
is also passed-through to any downstream clients including CDNs and browsers.
- You can configure
minimumCacheTTL
to increase the cache duration when the upstream image does not includeCache-Control
header or the value is very low. - You can configure
deviceSizes
andimageSizes
to reduce the total number of possible generated images. - You can configure formats to disable multiple formats in favor of a single image format.
minimumCacheTTL
You can configure the Time to Live (TTL) in seconds for cached optimized images. In many cases, it's better to use a Static Image Import which will automatically hash the file contents and cache the image forever with a Cache-Control
header of immutable
.
module.exports = {
images: {
minimumCacheTTL: 60,
},
}
The expiration (or rather Max Age) of the optimized image is defined by either the minimumCacheTTL
or the upstream image Cache-Control
header, whichever is larger.
If you need to change the caching behavior per image, you can configure headers
to set the Cache-Control
header on the upstream image (e.g. /some-asset.jpg
, not /_next/image
itself).
There is no mechanism to invalidate the cache at this time, so its best to keep minimumCacheTTL
low. Otherwise you may need to manually change the src
prop or delete <distDir>/cache/images
.
disableStaticImages
The default behavior allows you to import static files such as import icon from './icon.png'
and then pass that to the src
property.
In some cases, you may wish to disable this feature if it conflicts with other plugins that expect the import to behave differently.
You can disable static image imports inside your next.config.js
:
module.exports = {
images: {
disableStaticImages: true,
},
}
dangerouslyAllowSVG
The default loader does not optimize SVG images for a few reasons. First, SVG is a vector format meaning it can be resized losslessly. Second, SVG has many of the same features as HTML/CSS, which can lead to vulnerabilities without proper Content Security Policy (CSP) headers.
Therefore, we recommended using the unoptimized
prop when the src
prop is known to be SVG. This happens automatically when src
ends with ".svg"
.
However, if you need to serve SVG images with the default Image Optimization API, you can set dangerouslyAllowSVG
inside your next.config.js
:
module.exports = {
images: {
dangerouslyAllowSVG: true,
contentDispositionType: 'attachment',
contentSecurityPolicy: "default-src 'self'; script-src 'none'; sandbox;",
},
}
In addition, it is strongly recommended to also set contentDispositionType
to force the browser to download the image, as well as contentSecurityPolicy
to prevent scripts embedded in the image from executing.
contentDispositionType
The default loader sets the Content-Disposition
header to attachment
for added protection since the API can serve arbitrary remote images.
The default value is attachment
which forces the browser to download the image when visiting directly. This is particularly important when dangerouslyAllowSVG
is true.
You can optionally configure inline
to allow the browser to render the image when visiting directly, without downloading it.
module.exports = {
images: {
contentDispositionType: 'inline',
},
}
Animated Images
The default loader will automatically bypass Image Optimization for animated images and serve the image as-is.
Auto-detection for animated files is best-effort and supports GIF, APNG, and WebP. If you want to explicitly bypass Image Optimization for a given animated image, use the unoptimized prop.
Responsive Images
The default generated srcset
contains 1x
and 2x
images in order to support different device pixel ratios. However, you may wish to render a responsive image that stretches with the viewport. In that case, you'll need to set sizes
as well as style
(or className
).
You can render a responsive image using one of the following methods below.
Responsive image using a static import
If the source image is not dynamic, you can statically import to create a responsive image:
import Image from 'next/image'
import me from '../photos/me.jpg'
export default function Author() {
return (
<Image
src={me}
alt="Picture of the author"
sizes="100vw"
style={{
width: '100%',
height: 'auto',
}}
/>
)
}
Try it out:
Responsive image with aspect ratio
If the source image is a dynamic or a remote url, you will also need to provide width
and height
to set the correct aspect ratio of the responsive image:
import Image from 'next/image'
export default function Page({ photoUrl }) {
return (
<Image
src={photoUrl}
alt="Picture of the author"
sizes="100vw"
style={{
width: '100%',
height: 'auto',
}}
width={500}
height={300}
/>
)
}
Try it out:
Responsive image with fill
If you don't know the aspect ratio, you will need to set the fill
prop and set position: relative
on the parent. Optionally, you can set object-fit
style depending on the desired stretch vs crop behavior:
import Image from 'next/image'
export default function Page({ photoUrl }) {
return (
<div style={{ position: 'relative', width: '300px', height: '500px' }}>
<Image
src={photoUrl}
alt="Picture of the author"
sizes="300px"
fill
style={{
objectFit: 'contain',
}}
/>
</div>
)
}
Try it out:
Theme Detection CSS
If you want to display a different image for light and dark mode, you can create a new component that wraps two <Image>
components and reveals the correct one based on a CSS media query.
.imgDark {
display: none;
}
@media (prefers-color-scheme: dark) {
.imgLight {
display: none;
}
.imgDark {
display: unset;
}
}
import styles from './theme-image.module.css'
import Image, { ImageProps } from 'next/image'
type Props = Omit<ImageProps, 'src' | 'priority' | 'loading'> & {
srcLight: string
srcDark: string
}
const ThemeImage = (props: Props) => {
const { srcLight, srcDark, ...rest } = props
return (
<>
<Image {...rest} src={srcLight} className={styles.imgLight} />
<Image {...rest} src={srcDark} className={styles.imgDark} />
</>
)
}
Good to know: The default behavior of
loading="lazy"
ensures that only the correct image is loaded. You cannot usepriority
orloading="eager"
because that would cause both images to load. Instead, you can usefetchPriority="high"
.
Try it out:
getImageProps
For more advanced use cases, you can call getImageProps()
to get the props that would be passed to the underlying <img>
element, and instead pass to them to another component, style, canvas, etc.
This also avoid calling React useState()
so it can lead to better performance, but it cannot be used with the placeholder
prop because the placeholder will never be removed.
Theme Detection Picture
If you want to display a different image for light and dark mode, you can use the <picture>
element to display a different image based on the user's preferred color scheme.
import { getImageProps } from 'next/image'
export default function Page() {
const common = { alt: 'Theme Example', width: 800, height: 400 }
const {
props: { srcSet: dark },
} = getImageProps({ ...common, src: '/dark.png' })
const {
props: { srcSet: light, ...rest },
} = getImageProps({ ...common, src: '/light.png' })
return (
<picture>
<source media="(prefers-color-scheme: dark)" srcSet={dark} />
<source media="(prefers-color-scheme: light)" srcSet={light} />
<img {...rest} />
</picture>
)
}
Art Direction
If you want to display a different image for mobile and desktop, sometimes called Art Direction, you can provide different src
, width
, height
, and quality
props to getImageProps()
.
import { getImageProps } from 'next/image'
export default function Home() {
const common = { alt: 'Art Direction Example', sizes: '100vw' }
const {
props: { srcSet: desktop },
} = getImageProps({
...common,
width: 1440,
height: 875,
quality: 80,
src: '/desktop.jpg',
})
const {
props: { srcSet: mobile, ...rest },
} = getImageProps({
...common,
width: 750,
height: 1334,
quality: 70,
src: '/mobile.jpg',
})
return (
<picture>
<source media="(min-width: 1000px)" srcSet={desktop} />
<source media="(min-width: 500px)" srcSet={mobile} />
<img {...rest} style={{ width: '100%', height: 'auto' }} />
</picture>
)
}
Background CSS
You can even convert the srcSet
string to the image-set()
CSS function to optimize a background image.
import { getImageProps } from 'next/image'
function getBackgroundImage(srcSet = '') {
const imageSet = srcSet
.split(', ')
.map((str) => {
const [url, dpi] = str.split(' ')
return `url("${url}") ${dpi}`
})
.join(', ')
return `image-set(${imageSet})`
}
export default function Home() {
const {
props: { srcSet },
} = getImageProps({ alt: '', width: 128, height: 128, src: '/img.png' })
const backgroundImage = getBackgroundImage(srcSet)
const style = { height: '100vh', width: '100vw', backgroundImage }
return (
<main style={style}>
<h1>Hello World</h1>
</main>
)
}
Known Browser Bugs
This next/image
component uses browser native lazy loading, which may fallback to eager loading for older browsers before Safari 15.4. When using the blur-up placeholder, older browsers before Safari 12 will fallback to empty placeholder. When using styles with width
/height
of auto
, it is possible to cause Layout Shift on older browsers before Safari 15 that don't preserve the aspect ratio. For more details, see this MDN video.
- Safari 15 - 16.3 display a gray border while loading. Safari 16.4 fixed this issue. Possible solutions:
- Use CSS
@supports (font: -apple-system-body) and (-webkit-appearance: none) { img[loading="lazy"] { clip-path: inset(0.6px) } }
- Use
priority
if the image is above the fold
- Use CSS
- Firefox 67+ displays a white background while loading. Possible solutions:
- Enable AVIF
formats
- Use
placeholder
- Enable AVIF
Version History
Version | Changes |
---|---|
v15.0.0 | decoding prop added. contentDispositionType configuration default changed to attachment . |
v14.2.0 | overrideSrc prop added. |
v14.1.0 | getImageProps() is stable. |
v14.0.0 | onLoadingComplete prop and domains config deprecated. |
v13.4.14 | placeholder prop support for data:/image... |
v13.2.0 | contentDispositionType configuration added. |
v13.0.6 | ref prop added. |
v13.0.0 | The next/image import was renamed to next/legacy/image . The next/future/image import was renamed to next/image . A codemod is available to safely and automatically rename your imports. <span> wrapper removed. layout , objectFit , objectPosition , lazyBoundary , lazyRoot props removed. alt is required. onLoadingComplete receives reference to img element. Built-in loader config removed. |
v12.3.0 | remotePatterns and unoptimized configuration is stable. |
v12.2.0 | Experimental remotePatterns and experimental unoptimized configuration added. layout="raw" removed. |
v12.1.1 | style prop added. Experimental support for layout="raw" added. |
v12.1.0 | dangerouslyAllowSVG and contentSecurityPolicy configuration added. |
v12.0.9 | lazyRoot prop added. |
v12.0.0 | formats configuration added.AVIF support added. Wrapper <div> changed to <span> . |
v11.1.0 | onLoadingComplete and lazyBoundary props added. |
v11.0.0 | src prop support for static import.placeholder prop added.blurDataURL prop added. |
v10.0.5 | loader prop added. |
v10.0.1 | layout prop added. |
v10.0.0 | next/image introduced. |
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