[Float][Fizz][Fiber] support imagesrcset and imagesizes for ReactDOM.preload()
#26940
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As discussed, we're just going to never render "href" when imagesrcset is specified because that will double load in Safari which is worse than missing a preload in very old browsers. However, if Safari fixes that, we'll be able to reenable it so the option will still be there in our API.
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…le cases where srcset and sizes are used over src. Normally we key off an href however in the case of responsive images it is possible that no src attribute is desired. Right now this happens most prominently with Safari which does understand srcset for the img tag but not for the link preload tag. Because of this it can be detrimental to preload with a fallback src since Safari will end up downloading the wrong image 100% of the time. The solution to this is to allow the user to omit the href if they provide imagesrcset (and optionally) imagesizes. Effectively the key for image preloads will become the union of src (href), imagesrcset, and imagesizes.
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….preload()` (#26940) For float methods the href argument is usually all we need to uniquely key the request. However when preloading responsive images it is possible that you may need more than one preload for differing imagesizes attributes. When using imagesrcset for preloads the href attribute acts more like a fallback href. For keying purposes the imagesrcset becomes the primary key conceptually. This change updates the keying logic for `ReactDOM.preload()` when you pass `{as: "image"}` 1. If `options.imageSrcSet` is a non-emtpy string the key is defined as `options.imageSrcSet + options.imageSizes`. The `href` argument is still required but does not participate in keying. 2. If `options.imageSrcSet` is empty, missing, or an invalid format the key is defined as the `href`. Changing the `options.imageSizes` does not affect the key as this option is inert when not using `options.imageSrcSet` Additionally, currently there is a bug in webkit (Safari) that causes preload links to fail to use imageSrcSet and fallback to href even when the browser will correctly resolve srcset on an `<img>` tag. Because the drawbacks of preloading the wrong image (href over imagesrcset) in a modern browser outweight the drawbacks of not preloading anything for responsive images in browsers that do not support srcset at all we will omit the `href` attribute whenever `options.imageSrcSet` is provided. We still require you provide an href since we want to be able to revert this behavior once all major browsers support it bug link: https://bugs.webkit.org/show_bug.cgi?id=231150 DiffTrain build for [fc929cf](fc929cf)
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This PR updates the vendored react dependencies using `pnpm sync-react` ### React upstream changes - facebook/react#27028 - facebook/react#27027 - facebook/react#27019 - facebook/react#26954 - facebook/react#26987 - facebook/react#26985 - facebook/react#26933 - facebook/react#26625 - facebook/react#27011 - facebook/react#27008 - facebook/react#26997 - facebook/react#26989 - facebook/react#26955 - facebook/react#26963 - facebook/react#26983 - facebook/react#26914 - facebook/react#26951 - facebook/react#26977 - facebook/react#26958 - facebook/react#26940 - facebook/react#26939 - facebook/react#26887 - facebook/react#26947 - facebook/react#26945 - facebook/react#26942 - facebook/react#26938 - facebook/react#26844 - facebook/react#25510 - facebook/react#26932 - facebook/react#26896 - facebook/react#26913 - facebook/react#26888 - facebook/react#26827 - facebook/react#26889 - facebook/react#26877 - facebook/react#26873 - facebook/react#26880 - facebook/react#26842 - facebook/react#26858 - facebook/react#26754 - facebook/react#26753 - facebook/react#26881 ### Related Closes #49409 (by facebook/react#26977) fix NEXT-1189 Co-authored-by: Shu Ding <g@shud.in>
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Fixes #49409 ### React upstream changes - facebook/react#27045 - facebook/react#27051 - facebook/react#27032 - facebook/react#27031 - facebook/react#27029 - facebook/react#27028 - facebook/react#27027 - facebook/react#27019 - facebook/react#26954 - facebook/react#26987 - facebook/react#26985 - facebook/react#26933 - facebook/react#26625 - facebook/react#27011 - facebook/react#27008 - facebook/react#26997 - facebook/react#26989 - facebook/react#26955 - facebook/react#26963 - facebook/react#26983 - facebook/react#26914 - facebook/react#26951 - facebook/react#26977 - facebook/react#26958 - facebook/react#26940 - facebook/react#26939 - facebook/react#26887 - facebook/react#26947 - facebook/react#26945 - facebook/react#26942 - facebook/react#26938 - facebook/react#26844 - facebook/react#25510 - facebook/react#26932 - facebook/react#26896 - facebook/react#26913 - facebook/react#26888 - facebook/react#26827 - facebook/react#26889 - facebook/react#26877 - facebook/react#26873 - facebook/react#26880 - facebook/react#26842 - facebook/react#26858 - facebook/react#26754 - facebook/react#26753 - facebook/react#26881 --------- Co-authored-by: Jiachi Liu <inbox@huozhi.im>
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This PR updates the vendored react dependencies using `pnpm sync-react` ### React upstream changes - facebook/react#27028 - facebook/react#27027 - facebook/react#27019 - facebook/react#26954 - facebook/react#26987 - facebook/react#26985 - facebook/react#26933 - facebook/react#26625 - facebook/react#27011 - facebook/react#27008 - facebook/react#26997 - facebook/react#26989 - facebook/react#26955 - facebook/react#26963 - facebook/react#26983 - facebook/react#26914 - facebook/react#26951 - facebook/react#26977 - facebook/react#26958 - facebook/react#26940 - facebook/react#26939 - facebook/react#26887 - facebook/react#26947 - facebook/react#26945 - facebook/react#26942 - facebook/react#26938 - facebook/react#26844 - facebook/react#25510 - facebook/react#26932 - facebook/react#26896 - facebook/react#26913 - facebook/react#26888 - facebook/react#26827 - facebook/react#26889 - facebook/react#26877 - facebook/react#26873 - facebook/react#26880 - facebook/react#26842 - facebook/react#26858 - facebook/react#26754 - facebook/react#26753 - facebook/react#26881 ### Related Closes #49409 (by facebook/react#26977) fix NEXT-1189 Co-authored-by: Shu Ding <g@shud.in>
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….preload()` (facebook#26940) For float methods the href argument is usually all we need to uniquely key the request. However when preloading responsive images it is possible that you may need more than one preload for differing imagesizes attributes. When using imagesrcset for preloads the href attribute acts more like a fallback href. For keying purposes the imagesrcset becomes the primary key conceptually. This change updates the keying logic for `ReactDOM.preload()` when you pass `{as: "image"}` 1. If `options.imageSrcSet` is a non-emtpy string the key is defined as `options.imageSrcSet + options.imageSizes`. The `href` argument is still required but does not participate in keying. 2. If `options.imageSrcSet` is empty, missing, or an invalid format the key is defined as the `href`. Changing the `options.imageSizes` does not affect the key as this option is inert when not using `options.imageSrcSet` Additionally, currently there is a bug in webkit (Safari) that causes preload links to fail to use imageSrcSet and fallback to href even when the browser will correctly resolve srcset on an `<img>` tag. Because the drawbacks of preloading the wrong image (href over imagesrcset) in a modern browser outweight the drawbacks of not preloading anything for responsive images in browsers that do not support srcset at all we will omit the `href` attribute whenever `options.imageSrcSet` is provided. We still require you provide an href since we want to be able to revert this behavior once all major browsers support it bug link: https://bugs.webkit.org/show_bug.cgi?id=231150
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….preload()` (#26940) For float methods the href argument is usually all we need to uniquely key the request. However when preloading responsive images it is possible that you may need more than one preload for differing imagesizes attributes. When using imagesrcset for preloads the href attribute acts more like a fallback href. For keying purposes the imagesrcset becomes the primary key conceptually. This change updates the keying logic for `ReactDOM.preload()` when you pass `{as: "image"}` 1. If `options.imageSrcSet` is a non-emtpy string the key is defined as `options.imageSrcSet + options.imageSizes`. The `href` argument is still required but does not participate in keying. 2. If `options.imageSrcSet` is empty, missing, or an invalid format the key is defined as the `href`. Changing the `options.imageSizes` does not affect the key as this option is inert when not using `options.imageSrcSet` Additionally, currently there is a bug in webkit (Safari) that causes preload links to fail to use imageSrcSet and fallback to href even when the browser will correctly resolve srcset on an `<img>` tag. Because the drawbacks of preloading the wrong image (href over imagesrcset) in a modern browser outweight the drawbacks of not preloading anything for responsive images in browsers that do not support srcset at all we will omit the `href` attribute whenever `options.imageSrcSet` is provided. We still require you provide an href since we want to be able to revert this behavior once all major browsers support it bug link: https://bugs.webkit.org/show_bug.cgi?id=231150 DiffTrain build for commit fc929cf.
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For float methods the href argument is usually all we need to uniquely key the request. However when preloading responsive images it is possible that you may need more than one preload for differing imagesizes attributes. When using imagesrcset for preloads the href attribute acts more like a fallback href. For keying purposes the imagesrcset becomes the primary key conceptually.
This change updates the keying logic for
ReactDOM.preload()when you pass{as: "image"}options.imageSrcSetis a non-emtpy string the key is defined asoptions.imageSrcSet + options.imageSizes. Thehrefargument is still required but does not participate in keying.options.imageSrcSetis empty, missing, or an invalid format the key is defined as thehref. Changing theoptions.imageSizesdoes not affect the key as this option is inert when not usingoptions.imageSrcSetAdditionally, currently there is a bug in webkit (Safari) that causes preload links to fail to use imageSrcSet and fallback to href even when the browser will correctly resolve srcset on an
<img>tag. Because the drawbacks of preloading the wrong image (href over imagesrcset) in a modern browser outweight the drawbacks of not preloading anything for responsive images in browsers that do not support srcset at all we will omit thehrefattribute wheneveroptions.imageSrcSetis provided. We still require you provide an href since we want to be able to revert this behavior once all major browsers support itbug link: https://bugs.webkit.org/show_bug.cgi?id=231150