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Fix next/image svg blur placeholder with fill (#41573)
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This PR fixes two bugs:

- Fixes #40419 
- Fixes #41393 

The first is when the aspect ratio of the `width` and `height` does not
match the aspect ratio of the `blurDataURL` provided. This can result in
artifacts around the edges. The solution is to add
`preserveAspectRatio="none"`.

The second is when there is no `width` or `height` provided (which is
normal when using `fill`) so the viewBox was undefined. This can also
cause artifacts around the edges. The solution is to change the blur
technique from gaussian to css filter, similar to `next/legacy/image`.

Note: css blur might be [slower in
firefox](https://bugzilla.mozilla.org/show_bug.cgi?id=925025) which is
why we'll only use it for this corner case.
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@styfle
styfle authored Oct 19, 2022
1 parent 422ccb9 commit fe762d3
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Showing 6 changed files with 52 additions and 16 deletions.
5 changes: 4 additions & 1 deletion packages/next/shared/lib/image-blur-svg.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -20,5 +20,8 @@ export function getImageBlurSvg({
const feComponentTransfer = blurDataURL.startsWith('data:image/jpeg')
? `%3CfeComponentTransfer%3E%3CfeFuncA type='discrete' tableValues='1 1'/%3E%3C/feComponentTransfer%3E%`
: ''
return `%3Csvg xmlns='http%3A//www.w3.org/2000/svg' viewBox='0 0 ${svgWidth} ${svgHeight}'%3E%3Cfilter id='b' color-interpolation-filters='sRGB'%3E%3CfeGaussianBlur stdDeviation='${std}'/%3E${feComponentTransfer}%3C/filter%3E%3Cimage filter='url(%23b)' x='0' y='0' height='100%25' width='100%25' href='${blurDataURL}'/%3E%3C/svg%3E`
if (svgWidth && svgHeight) {
return `%3Csvg xmlns='http%3A//www.w3.org/2000/svg' viewBox='0 0 ${svgWidth} ${svgHeight}'%3E%3Cfilter id='b' color-interpolation-filters='sRGB'%3E%3CfeGaussianBlur stdDeviation='${std}'/%3E${feComponentTransfer}%3C/filter%3E%3Cimage preserveAspectRatio='none' filter='url(%23b)' x='0' y='0' height='100%25' width='100%25' href='${blurDataURL}'/%3E%3C/svg%3E`
}
return `%3Csvg xmlns='http%3A//www.w3.org/2000/svg'%3E%3Cimage style='filter:blur(20px)' x='0' y='0' height='100%25' width='100%25' href='${blurDataURL}'/%3E%3C/svg%3E`
}
4 changes: 2 additions & 2 deletions test/integration/image-optimizer/test/util.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -466,7 +466,7 @@ export function runTests(ctx) {
expect(res.status).toBe(200)
expect(res.headers.get('Content-Type')).toBe('image/svg+xml')
expect(await res.text()).toMatch(
`<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 8 8'><filter id='b' color-interpolation-filters='sRGB'><feGaussianBlur stdDeviation='1'/></filter><image filter='url(#b)' x='0' y='0' height='100%' width='100%' href='data:image/webp;base64`
`<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 8 8'><filter id='b' color-interpolation-filters='sRGB'><feGaussianBlur stdDeviation='1'/></filter><image preserveAspectRatio='none' filter='url(#b)' x='0' y='0' height='100%' width='100%' href='data:image/webp;base64`
)
} else {
expect(res.status).toBe(400)
Expand All @@ -482,7 +482,7 @@ export function runTests(ctx) {
expect(res.status).toBe(200)
expect(res.headers.get('Content-Type')).toBe('image/svg+xml')
expect(await res.text()).toMatch(
`<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 3 3'><filter id='b' color-interpolation-filters='sRGB'><feGaussianBlur stdDeviation='1'/></filter><image filter='url(#b)' x='0' y='0' height='100%' width='100%' href='data:image/webp;base64`
`<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 3 3'><filter id='b' color-interpolation-filters='sRGB'><feGaussianBlur stdDeviation='1'/></filter><image preserveAspectRatio='none' filter='url(#b)' x='0' y='0' height='100%' width='100%' href='data:image/webp;base64`
)
} else {
expect(res.status).toBe(400)
Expand Down
8 changes: 4 additions & 4 deletions test/integration/next-image-new/base-path/test/static.test.js
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Original file line number Diff line number Diff line change
Expand Up @@ -85,28 +85,28 @@ const runTests = (isDev) => {
expect(img.attr('height')).toBe('233')
})

it('Should add a blur placeholder a statically imported jpg', async () => {
it('should add a blur placeholder a statically imported jpg', async () => {
const style = $('#basic-static').attr('style')
if (isDev) {
expect(style).toBe(
`color:transparent;background-size:cover;background-position:50% 50%;background-repeat:no-repeat;background-image:url("/docs/_next/image?url=%2Fdocs%2F_next%2Fstatic%2Fmedia%2Ftest-rect.f323a148.jpg&w=8&q=70")`
)
} else {
expect(style).toBe(
`color:transparent;background-size:cover;background-position:50% 50%;background-repeat:no-repeat;background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http%3A//www.w3.org/2000/svg' viewBox='0 0 8 6'%3E%3Cfilter id='b' color-interpolation-filters='sRGB'%3E%3CfeGaussianBlur stdDeviation='1'/%3E%3CfeComponentTransfer%3E%3CfeFuncA type='discrete' tableValues='1 1'/%3E%3C/feComponentTransfer%3E%%3C/filter%3E%3Cimage filter='url(%23b)' x='0' y='0' height='100%25' width='100%25' href='data:image/jpeg;base64,/9j/4AAQSkZJRgABAQAAAQABAAD/2wCEAAoKCgoKCgsMDAsPEA4QDxYUExMUFiIYGhgaGCIzICUgICUgMy03LCksNy1RQDg4QFFeT0pPXnFlZXGPiI+7u/sBCgoKCgoKCwwMCw8QDhAPFhQTExQWIhgaGBoYIjMgJSAgJSAzLTcsKSw3LVFAODhAUV5PSk9ecWVlcY+Ij7u7+//CABEIAAYACAMBIgACEQEDEQH/xAAnAAEBAAAAAAAAAAAAAAAAAAAABwEBAAAAAAAAAAAAAAAAAAAAAP/aAAwDAQACEAMQAAAAmgP/xAAcEAACAQUBAAAAAAAAAAAAAAASFBMAAQMFERX/2gAIAQEAAT8AZ1HjrKZX55JysIc4Ff/EABQRAQAAAAAAAAAAAAAAAAAAAAD/2gAIAQIBAT8Af//EABQRAQAAAAAAAAAAAAAAAAAAAAD/2gAIAQMBAT8Af//Z'/%3E%3C/svg%3E")`
`color:transparent;background-size:cover;background-position:50% 50%;background-repeat:no-repeat;background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http%3A//www.w3.org/2000/svg' viewBox='0 0 8 6'%3E%3Cfilter id='b' color-interpolation-filters='sRGB'%3E%3CfeGaussianBlur stdDeviation='1'/%3E%3CfeComponentTransfer%3E%3CfeFuncA type='discrete' tableValues='1 1'/%3E%3C/feComponentTransfer%3E%%3C/filter%3E%3Cimage preserveAspectRatio='none' filter='url(%23b)' x='0' y='0' height='100%25' width='100%25' href='data:image/jpeg;base64,/9j/4AAQSkZJRgABAQAAAQABAAD/2wCEAAoKCgoKCgsMDAsPEA4QDxYUExMUFiIYGhgaGCIzICUgICUgMy03LCksNy1RQDg4QFFeT0pPXnFlZXGPiI+7u/sBCgoKCgoKCwwMCw8QDhAPFhQTExQWIhgaGBoYIjMgJSAgJSAzLTcsKSw3LVFAODhAUV5PSk9ecWVlcY+Ij7u7+//CABEIAAYACAMBIgACEQEDEQH/xAAnAAEBAAAAAAAAAAAAAAAAAAAABwEBAAAAAAAAAAAAAAAAAAAAAP/aAAwDAQACEAMQAAAAmgP/xAAcEAACAQUBAAAAAAAAAAAAAAASFBMAAQMFERX/2gAIAQEAAT8AZ1HjrKZX55JysIc4Ff/EABQRAQAAAAAAAAAAAAAAAAAAAAD/2gAIAQIBAT8Af//EABQRAQAAAAAAAAAAAAAAAAAAAAD/2gAIAQMBAT8Af//Z'/%3E%3C/svg%3E")`
)
}
})

it('Should add a blur placeholder a statically imported png', async () => {
it('should add a blur placeholder a statically imported png', async () => {
const style = $('#blur-png').attr('style')
if (isDev) {
expect(style).toBe(
`color:transparent;background-size:cover;background-position:50% 50%;background-repeat:no-repeat;background-image:url("/docs/_next/image?url=%2Fdocs%2F_next%2Fstatic%2Fmedia%2Ftest.3f1a293b.png&w=8&q=70")`
)
} else {
expect(style).toBe(
`color:transparent;background-size:cover;background-position:50% 50%;background-repeat:no-repeat;background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http%3A//www.w3.org/2000/svg' viewBox='0 0 8 8'%3E%3Cfilter id='b' color-interpolation-filters='sRGB'%3E%3CfeGaussianBlur stdDeviation='1'/%3E%3C/filter%3E%3Cimage filter='url(%23b)' x='0' y='0' height='100%25' width='100%25' href='data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAgAAAAICAAAAADhZOFXAAAAOklEQVR42iWGsQkAIBDE0iuIdiLOJjiGIzjiL/Meb4okiNYIlLjK3hJMzCQG1/0qmXXOUkjAV+m9wAMe3QiV6Ne8VgAAAABJRU5ErkJggg=='/%3E%3C/svg%3E")`
`color:transparent;background-size:cover;background-position:50% 50%;background-repeat:no-repeat;background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http%3A//www.w3.org/2000/svg' viewBox='0 0 8 8'%3E%3Cfilter id='b' color-interpolation-filters='sRGB'%3E%3CfeGaussianBlur stdDeviation='1'/%3E%3C/filter%3E%3Cimage preserveAspectRatio='none' filter='url(%23b)' x='0' y='0' height='100%25' width='100%25' href='data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAgAAAAICAAAAADhZOFXAAAAOklEQVR42iWGsQkAIBDE0iuIdiLOJjiGIzjiL/Meb4okiNYIlLjK3hJMzCQG1/0qmXXOUkjAV+m9wAMe3QiV6Ne8VgAAAABJRU5ErkJggg=='/%3E%3C/svg%3E")`
)
}
})
Expand Down
19 changes: 19 additions & 0 deletions test/integration/next-image-new/default/pages/static-img.js
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Original file line number Diff line number Diff line change
Expand Up @@ -16,6 +16,9 @@ import superWidePNG from '../public/super-wide.png'

import TallImage from '../components/TallImage'

const blurDataURL =
'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNM/s/wBwAFjwJgf8HDLgAAAABJRU5ErkJggg=='

const Page = () => {
return (
<div>
Expand Down Expand Up @@ -74,6 +77,22 @@ const Page = () => {
<Image id="blur-webp-fill" src={testWEBP} placeholder="blur" fill />
<Image id="blur-avif-fill" src={testAVIF} placeholder="blur" fill />
<br />
<Image
id="blurdataurl-fill"
src="/test.jpg"
placeholder="blur"
blurDataURL={blurDataURL}
fill
/>
<Image
id="blurdataurl-ratio"
src="/test.png"
placeholder="blur"
blurDataURL={blurDataURL}
width="100"
height="200"
/>
<br />
<Image id="static-unoptimized" src={testJPG} unoptimized />
</div>
)
Expand Down
6 changes: 3 additions & 3 deletions test/integration/next-image-new/default/test/index.test.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -1139,11 +1139,11 @@ function runTests(mode) {
$html('noscript > img').attr('id', 'unused')

expect($html('#blurry-placeholder-raw')[0].attribs.style).toContain(
`color:transparent;background-size:cover;background-position:50% 50%;background-repeat:no-repeat;background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http%3A//www.w3.org/2000/svg' viewBox='0 0 400 400'%3E%3Cfilter id='b' color-interpolation-filters='sRGB'%3E%3CfeGaussianBlur stdDeviation='20'/%3E%3C/filter%3E%3Cimage filter='url(%23b)' x='0' y='0' height='100%25' width='100%25' href='data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mP8P4nhDwAGuAKPn6cicwAAAABJRU5ErkJggg=='/%3E%3C/svg%3E")`
`color:transparent;background-size:cover;background-position:50% 50%;background-repeat:no-repeat;background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http%3A//www.w3.org/2000/svg' viewBox='0 0 400 400'%3E%3Cfilter id='b' color-interpolation-filters='sRGB'%3E%3CfeGaussianBlur stdDeviation='20'/%3E%3C/filter%3E%3Cimage preserveAspectRatio='none' filter='url(%23b)' x='0' y='0' height='100%25' width='100%25' href='data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mP8P4nhDwAGuAKPn6cicwAAAABJRU5ErkJggg=='/%3E%3C/svg%3E")`
)

expect($html('#blurry-placeholder-with-lazy')[0].attribs.style).toContain(
`color:transparent;background-size:cover;background-position:50% 50%;background-repeat:no-repeat;background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http%3A//www.w3.org/2000/svg' viewBox='0 0 400 400'%3E%3Cfilter id='b' color-interpolation-filters='sRGB'%3E%3CfeGaussianBlur stdDeviation='20'/%3E%3C/filter%3E%3Cimage filter='url(%23b)' x='0' y='0' height='100%25' width='100%25' href='data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mO0/8/wBwAE/wI85bEJ6gAAAABJRU5ErkJggg=='/%3E%3C/svg%3E")`
`color:transparent;background-size:cover;background-position:50% 50%;background-repeat:no-repeat;background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http%3A//www.w3.org/2000/svg' viewBox='0 0 400 400'%3E%3Cfilter id='b' color-interpolation-filters='sRGB'%3E%3CfeGaussianBlur stdDeviation='20'/%3E%3C/filter%3E%3Cimage preserveAspectRatio='none' filter='url(%23b)' x='0' y='0' height='100%25' width='100%25' href='data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mO0/8/wBwAE/wI85bEJ6gAAAABJRU5ErkJggg=='/%3E%3C/svg%3E")`
)
})

Expand All @@ -1165,7 +1165,7 @@ function runTests(mode) {
'background-image'
)
).toBe(
`url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http%3A//www.w3.org/2000/svg' viewBox='0 0 400 400'%3E%3Cfilter id='b' color-interpolation-filters='sRGB'%3E%3CfeGaussianBlur stdDeviation='20'/%3E%3C/filter%3E%3Cimage filter='url(%23b)' x='0' y='0' height='100%25' width='100%25' href='data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mO0/8/wBwAE/wI85bEJ6gAAAABJRU5ErkJggg=='/%3E%3C/svg%3E")`
`url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http%3A//www.w3.org/2000/svg' viewBox='0 0 400 400'%3E%3Cfilter id='b' color-interpolation-filters='sRGB'%3E%3CfeGaussianBlur stdDeviation='20'/%3E%3C/filter%3E%3Cimage preserveAspectRatio='none' filter='url(%23b)' x='0' y='0' height='100%25' width='100%25' href='data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mO0/8/wBwAE/wI85bEJ6gAAAABJRU5ErkJggg=='/%3E%3C/svg%3E")`
)

await browser.eval('document.getElementById("spacer").remove()')
Expand Down
26 changes: 20 additions & 6 deletions test/integration/next-image-new/default/test/static.test.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -90,44 +90,58 @@ const runTests = (isDev) => {
expect(img.attr('height')).toBe('233')
})

it('Should add a blur placeholder a statically imported jpg', async () => {
it('should add a blur placeholder a statically imported jpg', async () => {
const style = $('#basic-static').attr('style')
if (isDev) {
expect(style).toBe(
`color:transparent;background-size:cover;background-position:50% 50%;background-repeat:no-repeat;background-image:url("/_next/image?url=%2F_next%2Fstatic%2Fmedia%2Ftest-rect.f323a148.jpg&w=8&q=70")`
)
} else {
expect(style).toBe(
`color:transparent;background-size:cover;background-position:50% 50%;background-repeat:no-repeat;background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http%3A//www.w3.org/2000/svg' viewBox='0 0 8 6'%3E%3Cfilter id='b' color-interpolation-filters='sRGB'%3E%3CfeGaussianBlur stdDeviation='1'/%3E%3CfeComponentTransfer%3E%3CfeFuncA type='discrete' tableValues='1 1'/%3E%3C/feComponentTransfer%3E%%3C/filter%3E%3Cimage filter='url(%23b)' x='0' y='0' height='100%25' width='100%25' href='data:image/jpeg;base64,/9j/4AAQSkZJRgABAQAAAQABAAD/2wCEAAoKCgoKCgsMDAsPEA4QDxYUExMUFiIYGhgaGCIzICUgICUgMy03LCksNy1RQDg4QFFeT0pPXnFlZXGPiI+7u/sBCgoKCgoKCwwMCw8QDhAPFhQTExQWIhgaGBoYIjMgJSAgJSAzLTcsKSw3LVFAODhAUV5PSk9ecWVlcY+Ij7u7+//CABEIAAYACAMBIgACEQEDEQH/xAAnAAEBAAAAAAAAAAAAAAAAAAAABwEBAAAAAAAAAAAAAAAAAAAAAP/aAAwDAQACEAMQAAAAmgP/xAAcEAACAQUBAAAAAAAAAAAAAAASFBMAAQMFERX/2gAIAQEAAT8AZ1HjrKZX55JysIc4Ff/EABQRAQAAAAAAAAAAAAAAAAAAAAD/2gAIAQIBAT8Af//EABQRAQAAAAAAAAAAAAAAAAAAAAD/2gAIAQMBAT8Af//Z'/%3E%3C/svg%3E")`
`color:transparent;background-size:cover;background-position:50% 50%;background-repeat:no-repeat;background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http%3A//www.w3.org/2000/svg' viewBox='0 0 8 6'%3E%3Cfilter id='b' color-interpolation-filters='sRGB'%3E%3CfeGaussianBlur stdDeviation='1'/%3E%3CfeComponentTransfer%3E%3CfeFuncA type='discrete' tableValues='1 1'/%3E%3C/feComponentTransfer%3E%%3C/filter%3E%3Cimage preserveAspectRatio='none' filter='url(%23b)' x='0' y='0' height='100%25' width='100%25' href='data:image/jpeg;base64,/9j/4AAQSkZJRgABAQAAAQABAAD/2wCEAAoKCgoKCgsMDAsPEA4QDxYUExMUFiIYGhgaGCIzICUgICUgMy03LCksNy1RQDg4QFFeT0pPXnFlZXGPiI+7u/sBCgoKCgoKCwwMCw8QDhAPFhQTExQWIhgaGBoYIjMgJSAgJSAzLTcsKSw3LVFAODhAUV5PSk9ecWVlcY+Ij7u7+//CABEIAAYACAMBIgACEQEDEQH/xAAnAAEBAAAAAAAAAAAAAAAAAAAABwEBAAAAAAAAAAAAAAAAAAAAAP/aAAwDAQACEAMQAAAAmgP/xAAcEAACAQUBAAAAAAAAAAAAAAASFBMAAQMFERX/2gAIAQEAAT8AZ1HjrKZX55JysIc4Ff/EABQRAQAAAAAAAAAAAAAAAAAAAAD/2gAIAQIBAT8Af//EABQRAQAAAAAAAAAAAAAAAAAAAAD/2gAIAQMBAT8Af//Z'/%3E%3C/svg%3E")`
)
}
})

it('Should add a blur placeholder a statically imported png', async () => {
it('should add a blur placeholder a statically imported png', async () => {
const style = $('#blur-png').attr('style')
if (isDev) {
expect(style).toBe(
`color:transparent;background-size:cover;background-position:50% 50%;background-repeat:no-repeat;background-image:url("/_next/image?url=%2F_next%2Fstatic%2Fmedia%2Ftest.3f1a293b.png&w=8&q=70")`
)
} else {
expect(style).toBe(
`color:transparent;background-size:cover;background-position:50% 50%;background-repeat:no-repeat;background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http%3A//www.w3.org/2000/svg' viewBox='0 0 8 8'%3E%3Cfilter id='b' color-interpolation-filters='sRGB'%3E%3CfeGaussianBlur stdDeviation='1'/%3E%3C/filter%3E%3Cimage filter='url(%23b)' x='0' y='0' height='100%25' width='100%25' href='data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAgAAAAICAAAAADhZOFXAAAAOklEQVR42iWGsQkAIBDE0iuIdiLOJjiGIzjiL/Meb4okiNYIlLjK3hJMzCQG1/0qmXXOUkjAV+m9wAMe3QiV6Ne8VgAAAABJRU5ErkJggg=='/%3E%3C/svg%3E")`
`color:transparent;background-size:cover;background-position:50% 50%;background-repeat:no-repeat;background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http%3A//www.w3.org/2000/svg' viewBox='0 0 8 8'%3E%3Cfilter id='b' color-interpolation-filters='sRGB'%3E%3CfeGaussianBlur stdDeviation='1'/%3E%3C/filter%3E%3Cimage preserveAspectRatio='none' filter='url(%23b)' x='0' y='0' height='100%25' width='100%25' href='data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAgAAAAICAAAAADhZOFXAAAAOklEQVR42iWGsQkAIBDE0iuIdiLOJjiGIzjiL/Meb4okiNYIlLjK3hJMzCQG1/0qmXXOUkjAV+m9wAMe3QiV6Ne8VgAAAABJRU5ErkJggg=='/%3E%3C/svg%3E")`
)
}
})

it('Should add a blur placeholder a statically imported png with fill', async () => {
it('should add a blur placeholder a statically imported png with fill', async () => {
const style = $('#blur-png-fill').attr('style')
if (isDev) {
expect(style).toBe(
`position:absolute;height:100%;width:100%;left:0;top:0;right:0;bottom:0;color:transparent;background-size:cover;background-position:50% 50%;background-repeat:no-repeat;background-image:url("/_next/image?url=%2F_next%2Fstatic%2Fmedia%2Ftest.3f1a293b.png&w=8&q=70")`
)
} else {
expect(style).toBe(
`position:absolute;height:100%;width:100%;left:0;top:0;right:0;bottom:0;color:transparent;background-size:cover;background-position:50% 50%;background-repeat:no-repeat;background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http%3A//www.w3.org/2000/svg' viewBox='0 0 8 8'%3E%3Cfilter id='b' color-interpolation-filters='sRGB'%3E%3CfeGaussianBlur stdDeviation='1'/%3E%3C/filter%3E%3Cimage filter='url(%23b)' x='0' y='0' height='100%25' width='100%25' href='data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAgAAAAICAAAAADhZOFXAAAAOklEQVR42iWGsQkAIBDE0iuIdiLOJjiGIzjiL/Meb4okiNYIlLjK3hJMzCQG1/0qmXXOUkjAV+m9wAMe3QiV6Ne8VgAAAABJRU5ErkJggg=='/%3E%3C/svg%3E")`
`position:absolute;height:100%;width:100%;left:0;top:0;right:0;bottom:0;color:transparent;background-size:cover;background-position:50% 50%;background-repeat:no-repeat;background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http%3A//www.w3.org/2000/svg' viewBox='0 0 8 8'%3E%3Cfilter id='b' color-interpolation-filters='sRGB'%3E%3CfeGaussianBlur stdDeviation='1'/%3E%3C/filter%3E%3Cimage preserveAspectRatio='none' filter='url(%23b)' x='0' y='0' height='100%25' width='100%25' href='data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAgAAAAICAAAAADhZOFXAAAAOklEQVR42iWGsQkAIBDE0iuIdiLOJjiGIzjiL/Meb4okiNYIlLjK3hJMzCQG1/0qmXXOUkjAV+m9wAMe3QiV6Ne8VgAAAABJRU5ErkJggg=='/%3E%3C/svg%3E")`
)
}
})

it('should add placeholder with blurDataURL and fill', async () => {
const style = $('#blurdataurl-fill').attr('style')
expect(style).toBe(
`position:absolute;height:100%;width:100%;left:0;top:0;right:0;bottom:0;color:transparent;background-size:cover;background-position:50% 50%;background-repeat:no-repeat;background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http%3A//www.w3.org/2000/svg'%3E%3Cimage style='filter:blur(20px)' x='0' y='0' height='100%25' width='100%25' href='data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNM/s/wBwAFjwJgf8HDLgAAAABJRU5ErkJggg=='/%3E%3C/svg%3E")`
)
})

it('should add placeholder even when blurDataURL aspect ratio does not match width/height ratio', async () => {
const style = $('#blurdataurl-ratio').attr('style')
expect(style).toBe(
`color:transparent;background-size:cover;background-position:50% 50%;background-repeat:no-repeat;background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http%3A//www.w3.org/2000/svg' viewBox='0 0 100 200'%3E%3Cfilter id='b' color-interpolation-filters='sRGB'%3E%3CfeGaussianBlur stdDeviation='20'/%3E%3C/filter%3E%3Cimage preserveAspectRatio='none' filter='url(%23b)' x='0' y='0' height='100%25' width='100%25' href='data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNM/s/wBwAFjwJgf8HDLgAAAABJRU5ErkJggg=='/%3E%3C/svg%3E")`
)
})
}

describe('Build Error Tests', () => {
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