Intent to Ship: Custom Highlight API
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Daniel Clark
Aug 12, 2021, 5:23:21 PM8/12/21
to blin...@chromium.org, Fernando Fiori, Bo Cupp, Sanket Joshi (EDGE)
Contact emails
sa...@microsoft.com, ffi...@microsoft.com, pc...@microsoft.com, dan...@microsoft.com
Explainer
https://github.com/MicrosoftEdge/MSEdgeExplainers/blob/main/highlight/explainer.md
Specification
https://drafts.csswg.org/css-highlight-api-1/
Summary
The custom highlight API provides a way for web developers to style the text of arbitrary ranges. This is useful in a variety of scenarios, including editing frameworks that wish to implement their own selection, find-on-page over virtualized documents, multiple selections to represent online collaboration, or spellchecking frameworks.
Blink component
Search tags
Custom Highlight API, Highlight API
TAG review
https://github.com/w3ctag/design-reviews/issues/584
TAG review status
Issues addressed
Risks
Interoperability and Compatibility
Low: This feature received positive support from Safari and Firefox at TPAC 2019. Safari has implemented the feature.
Gecko: No signal (https://github.com/mozilla/standards-positions/issues/482)
WebKit: Shipped/Shipping (https://developer.apple.com/safari/technology-preview/release-notes/)
Highlight API listed in Release 99 notes.
Web developers: Strongly positive (https://github.com/w3c/csswg-drafts/issues/4307)
Multiple use cases have been pointed out in this issue. CKEditor has also shown support from the first highlight API explainer.
Ergonomics
The highlight API will be the first use case for constructible StaticRanges, which the API permits as an alternative to Iive Ranges because they do not incur cost during DOM mutations.
Activation
No. Web developers should be able to use the feature as-is. It is also easy to feature detect (checking for the existence of CSS.highlights).
Debuggability
DevTools shows ::highlight pseudo elements, in the same way that it shows other pseudo elements.
Is this feature fully tested by web-platform-tests?
Yes
https://wpt.fyi/results/css/css-highlight-api?label=master&label=experimental&aligned&q=css
https://wpt.fyi/results/css/css-highlight-api/painting?label=master&label=experimental&aligned&q=css
Flag name
--enable-blink-features=HighlightAPI
Requires code in //chrome?
False
Tracking bug
Estimated milestones
Comments:
Highlight API does not yet support all of the pseudos at https://www.w3.org/TR/css-pseudo-4/#highlight-styling -- the current implementation only supports color and background-color. However, we believe there is value in shipping starting with just these styles, since they are sufficient to support key scenarios like custom find-on-page.
Link to entry on the Chrome Platform Status
https://chromestatus.com/feature/5436441440026624
Links to previous Intent discussions
Intent to prototype: https://groups.google.com/a/chromium.org/g/blink-dev/c/Ix2u8NHG5Po/m/jjMjWIHXAQAJ
This intent message was generated by Chrome Platform Status.
Emilio Cobos Álvarez
Aug 12, 2021, 6:13:22 PM8/12/21
to Daniel Clark, blin...@chromium.org, Fernando Fiori, Bo Cupp, Sanket Joshi (EDGE)
Is Safari actually shipping it? What I see is that they implement it as
a (default off) experimental feature, which I don't think qualifies as
"shipping" by any means.
-- Emilio
On 8/12/21 23:23, 'Daniel Clark' via blink-dev wrote:
>
> Contact emails
>
> sa...@microsoft.com <mailto:sa...@microsoft.com>, ffi...@microsoft.com
> <mailto:ffi...@microsoft.com>, pc...@microsoft.com
> <mailto:pc...@microsoft.com>, dan...@microsoft.com
> <mailto:dan...@microsoft.com>
>
>
> Explainer
>
> https://github.com/MicrosoftEdge/MSEdgeExplainers/blob/main/highlight/explainer.md
> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2FMicrosoftEdge%2FMSEdgeExplainers%2Fblob%2Fmain%2Fhighlight%2Fexplainer.md&data=04%7C01%7Cdaniec%40microsoft.com%7C2a12427c7e9e481ecaa308d95c5061c5%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637642322580446981%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=JbmmAHzPIolZl%2F08pDC6uY6blTXwG27Q78ZxI07V%2Bpk%3D&reserved=0>
>
>
> Specification
>
> https://drafts.csswg.org/css-highlight-api-1/
> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdrafts.csswg.org%2Fcss-highlight-api-1%2F&data=04%7C01%7Cdaniec%40microsoft.com%7C2a12427c7e9e481ecaa308d95c5061c5%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637642322580446981%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=9Vob9NWrYA1B1vnZAAIqKnfJrxJm6abIkAy5BR4sb%2FE%3D&reserved=0>
>
>
> Search tags
>
> Custom Highlight API
> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fchromestatus.com%2Ffeatures%23tags%3ACustom%2520Highlight%2520API&data=04%7C01%7Cdaniec%40microsoft.com%7C2a12427c7e9e481ecaa308d95c5061c5%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637642322580456973%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=dtLSnJKHBXzsvFzIUhU5u3SZIYa2dQVlX%2Bp3IlnKm8E%3D&reserved=0>,
> Highlight API
> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fchromestatus.com%2Ffeatures%23tags%3AHighlight%2520API&data=04%7C01%7Cdaniec%40microsoft.com%7C2a12427c7e9e481ecaa308d95c5061c5%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637642322580466968%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=uNCxe0DTl6YNhLM2H9PjUOH5fEDwMWvlj7B0BPvtlmE%3D&reserved=0>
>
>
> TAG review
>
> https://github.com/w3ctag/design-reviews/issues/584
> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Fw3ctag%2Fdesign-reviews%2Fissues%2F584&data=04%7C01%7Cdaniec%40microsoft.com%7C2a12427c7e9e481ecaa308d95c5061c5%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637642322580606896%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=52NnOpqK8kGtRxCojyZ%2FCPSzHshjCkrRxer9d4LZsGM%3D&reserved=0>
> (https://github.com/mozilla/standards-positions/issues/482
> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fchromestatus.com%2Fadmin%2Ffeatures%2Flaunch%2F5436441440026624%2F5%3Fintent%3D1&data=04%7C01%7Cdaniec%40microsoft.com%7C2a12427c7e9e481ecaa308d95c5061c5%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637642322580616885%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=iPwb2TD48%2FUN4daesvLn5tpneL9Xtw4gP3V4npnc4PU%3D&reserved=0>)
>
> /WebKit/: Shipped/Shipping
> (https://developer.apple.com/safari/technology-preview/release-notes/
> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdeveloper.apple.com%2Fsafari%2Ftechnology-preview%2Frelease-notes%2F&data=04%7C01%7Cdaniec%40microsoft.com%7C2a12427c7e9e481ecaa308d95c5061c5%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637642322580626879%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=CMKjNCReqT7GrKiIU5ay4Z94wc5CSUva9V4s8dOM3b4%3D&reserved=0>)
> (https://github.com/w3c/csswg-drafts/issues/4307
> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Fw3c%2Fcsswg-drafts%2Fissues%2F4307&data=04%7C01%7Cdaniec%40microsoft.com%7C2a12427c7e9e481ecaa308d95c5061c5%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637642322580626879%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=PtNZoxOgIqrnXs3sA8y6NTD64rnRTtFUdbcI4jFmnIE%3D&reserved=0>)
>
> Yes
> https://wpt.fyi/results/css/css-highlight-api?label=master&label=experimental&aligned&q=css
> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwpt.fyi%2Fresults%2Fcss%2Fcss-highlight-api%3Flabel%3Dmaster%26label%3Dexperimental%26aligned%26q%3Dcss&data=04%7C01%7Cdaniec%40microsoft.com%7C2a12427c7e9e481ecaa308d95c5061c5%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637642322580636878%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=QIFpmEJMdwUcAsfYnmNb4uz652DFkIf7rlXSoLl052c%3D&reserved=0>
>
> https://wpt.fyi/results/css/css-highlight-api/painting?label=master&label=experimental&aligned&q=css
> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwpt.fyi%2Fresults%2Fcss%2Fcss-highlight-api%2Fpainting%3Flabel%3Dmaster%26label%3Dexperimental%26aligned%26q%3Dcss&data=04%7C01%7Cdaniec%40microsoft.com%7C2a12427c7e9e481ecaa308d95c5061c5%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637642322580646868%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=jYoxJY4LYwMUwDD3nfE1OE0WxEfCKWM7ARlncHDfxjQ%3D&reserved=0>
>
>
> Estimated milestones
>
> *Comments:*
>
> --
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> <https://groups.google.com/a/chromium.org/d/msgid/blink-dev/BL0PR00MB0435222C2F1E0F4BC013388FC5F99%40BL0PR00MB0435.namprd00.prod.outlook.com?utm_medium=email&utm_source=footer>.
a (default off) experimental feature, which I don't think qualifies as
"shipping" by any means.
-- Emilio
On 8/12/21 23:23, 'Daniel Clark' via blink-dev wrote:
>
> Contact emails
>
> sa...@microsoft.com <mailto:sa...@microsoft.com>, ffi...@microsoft.com
> <mailto:ffi...@microsoft.com>, pc...@microsoft.com
> <mailto:pc...@microsoft.com>, dan...@microsoft.com
> <mailto:dan...@microsoft.com>
>
>
> Explainer
>
> https://github.com/MicrosoftEdge/MSEdgeExplainers/blob/main/highlight/explainer.md
> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2FMicrosoftEdge%2FMSEdgeExplainers%2Fblob%2Fmain%2Fhighlight%2Fexplainer.md&data=04%7C01%7Cdaniec%40microsoft.com%7C2a12427c7e9e481ecaa308d95c5061c5%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637642322580446981%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=JbmmAHzPIolZl%2F08pDC6uY6blTXwG27Q78ZxI07V%2Bpk%3D&reserved=0>
>
>
> Specification
>
> https://drafts.csswg.org/css-highlight-api-1/
> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdrafts.csswg.org%2Fcss-highlight-api-1%2F&data=04%7C01%7Cdaniec%40microsoft.com%7C2a12427c7e9e481ecaa308d95c5061c5%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637642322580446981%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=9Vob9NWrYA1B1vnZAAIqKnfJrxJm6abIkAy5BR4sb%2FE%3D&reserved=0>
>
>
> Summary
>
> The custom highlight API provides a way for web developers to style the
> text of arbitrary ranges. This is useful in a variety of scenarios,
> including editing frameworks that wish to implement their own selection,
> find-on-page over virtualized documents, multiple selections to
> represent online collaboration, or spellchecking frameworks.
>
>
> Blink component
>
> Blink>Editing
> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fbugs.chromium.org%2Fp%2Fchromium%2Fissues%2Flist%3Fq%3Dcomponent%3ABlink%253EEditing&data=04%7C01%7Cdaniec%40microsoft.com%7C2a12427c7e9e481ecaa308d95c5061c5%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637642322580456973%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=DSrNFxsJ8cs5yhk4UkJpHyMJcI0JAfp1tQo3AfYcuSY%3D&reserved=0>
>
> Summary
>
> The custom highlight API provides a way for web developers to style the
> text of arbitrary ranges. This is useful in a variety of scenarios,
> including editing frameworks that wish to implement their own selection,
> find-on-page over virtualized documents, multiple selections to
> represent online collaboration, or spellchecking frameworks.
>
>
> Blink component
>
> Blink>Editing
>
>
> Search tags
>
> Custom Highlight API
> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fchromestatus.com%2Ffeatures%23tags%3ACustom%2520Highlight%2520API&data=04%7C01%7Cdaniec%40microsoft.com%7C2a12427c7e9e481ecaa308d95c5061c5%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637642322580456973%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=dtLSnJKHBXzsvFzIUhU5u3SZIYa2dQVlX%2Bp3IlnKm8E%3D&reserved=0>,
> Highlight API
> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fchromestatus.com%2Ffeatures%23tags%3AHighlight%2520API&data=04%7C01%7Cdaniec%40microsoft.com%7C2a12427c7e9e481ecaa308d95c5061c5%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637642322580466968%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=uNCxe0DTl6YNhLM2H9PjUOH5fEDwMWvlj7B0BPvtlmE%3D&reserved=0>
>
>
> TAG review
>
> https://github.com/w3ctag/design-reviews/issues/584
> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Fw3ctag%2Fdesign-reviews%2Fissues%2F584&data=04%7C01%7Cdaniec%40microsoft.com%7C2a12427c7e9e481ecaa308d95c5061c5%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637642322580606896%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=52NnOpqK8kGtRxCojyZ%2FCPSzHshjCkrRxer9d4LZsGM%3D&reserved=0>
>
>
> TAG review status
>
> Issues addressed
>
>
> Risks
>
>
> Interoperability and Compatibility
>
> Low: This feature received positive support from Safari and Firefox at
> TPAC 2019. Safari has implemented the feature.
>
>
>
> /Gecko/: No signal
>
> TAG review status
>
> Issues addressed
>
>
> Risks
>
>
> Interoperability and Compatibility
>
> Low: This feature received positive support from Safari and Firefox at
> TPAC 2019. Safari has implemented the feature.
>
>
>
> (https://github.com/mozilla/standards-positions/issues/482
> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fchromestatus.com%2Fadmin%2Ffeatures%2Flaunch%2F5436441440026624%2F5%3Fintent%3D1&data=04%7C01%7Cdaniec%40microsoft.com%7C2a12427c7e9e481ecaa308d95c5061c5%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637642322580616885%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=iPwb2TD48%2FUN4daesvLn5tpneL9Xtw4gP3V4npnc4PU%3D&reserved=0>)
>
> /WebKit/: Shipped/Shipping
> (https://developer.apple.com/safari/technology-preview/release-notes/
> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdeveloper.apple.com%2Fsafari%2Ftechnology-preview%2Frelease-notes%2F&data=04%7C01%7Cdaniec%40microsoft.com%7C2a12427c7e9e481ecaa308d95c5061c5%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637642322580626879%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=CMKjNCReqT7GrKiIU5ay4Z94wc5CSUva9V4s8dOM3b4%3D&reserved=0>)
> Highlight API listed in Release 99 notes.
>
> /Web developers/: Strongly positive
>
> (https://github.com/w3c/csswg-drafts/issues/4307
> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Fw3c%2Fcsswg-drafts%2Fissues%2F4307&data=04%7C01%7Cdaniec%40microsoft.com%7C2a12427c7e9e481ecaa308d95c5061c5%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637642322580626879%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=PtNZoxOgIqrnXs3sA8y6NTD64rnRTtFUdbcI4jFmnIE%3D&reserved=0>)
> Multiple use cases have been pointed out in this issue. CKEditor has
> also shown support from the first highlight API explainer.
>
>
> Ergonomics
>
>
> The highlight API will be the first use case for constructible
> StaticRanges, which the API permits as an alternative to Iive
> Ranges because they do not incur cost during DOM mutations.
>
>
> Activation
>
> No. Web developers should be able to use the feature as-is. It is also
> easy to feature detect (checking for the existence of CSS.highlights).
>
>
> Debuggability
>
> DevTools shows ::highlight pseudo elements, in the same way that it
> shows other pseudo elements.
>
>
> Is this feature fully tested by web-platform-tests
> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fchromium.googlesource.com%2Fchromium%2Fsrc%2F%2B%2Fmaster%2Fdocs%2Ftesting%2Fweb_platform_tests.md&data=04%7C01%7Cdaniec%40microsoft.com%7C2a12427c7e9e481ecaa308d95c5061c5%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637642322580636878%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=v8r9hOHYZI4s7T6GQlUJs%2BFgUiIkAuKdhxDv4LhyBlM%3D&reserved=0>?
> also shown support from the first highlight API explainer.
>
>
> Ergonomics
>
>
> The highlight API will be the first use case for constructible
> StaticRanges, which the API permits as an alternative to Iive
> Ranges because they do not incur cost during DOM mutations.
>
>
> Activation
>
> No. Web developers should be able to use the feature as-is. It is also
> easy to feature detect (checking for the existence of CSS.highlights).
>
>
> Debuggability
>
> DevTools shows ::highlight pseudo elements, in the same way that it
> shows other pseudo elements.
>
>
> Is this feature fully tested by web-platform-tests
>
> Yes
> https://wpt.fyi/results/css/css-highlight-api?label=master&label=experimental&aligned&q=css
> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwpt.fyi%2Fresults%2Fcss%2Fcss-highlight-api%3Flabel%3Dmaster%26label%3Dexperimental%26aligned%26q%3Dcss&data=04%7C01%7Cdaniec%40microsoft.com%7C2a12427c7e9e481ecaa308d95c5061c5%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637642322580636878%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=QIFpmEJMdwUcAsfYnmNb4uz652DFkIf7rlXSoLl052c%3D&reserved=0>
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>
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>
> --enable-blink-features=HighlightAPI
>
>
> Requires code in //chrome?
>
> False
>
>
> Tracking bug
>
> https://crbug.com/1164461
> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fcrbug.com%2F1164461&data=04%7C01%7Cdaniec%40microsoft.com%7C2a12427c7e9e481ecaa308d95c5061c5%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637642322580646868%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=keAnqP2t51eI2ffdFlfF0hslBCgaq3icRpE6yGDAViU%3D&reserved=0>
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>
> False
>
>
> Tracking bug
>
> https://crbug.com/1164461
>
>
> Estimated milestones
>
> *Comments:*
>
>
> Highlight API does not yet support all of the pseudos at
> https://www.w3.org/TR/css-pseudo-4/#highlight-styling
> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.w3.org%2FTR%2Fcss-pseudo-4%2F%23highlight-styling&data=04%7C01%7Cdaniec%40microsoft.com%7C2a12427c7e9e481ecaa308d95c5061c5%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637642322580656862%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=Xxbo55hYTNdAiHtLdB1C8Ks5w1QSMduaV%2FKIkOs%2Fz9Q%3D&reserved=0>--
>
> Highlight API does not yet support all of the pseudos at
> https://www.w3.org/TR/css-pseudo-4/#highlight-styling
> the current implementation only supports color and
> background-color. However, we believe there is value in shipping
> starting with just these styles, since they are sufficient to
> support key scenarios like custom find-on-page.
>
>
> Link to entry on the Chrome Platform Status
>
> https://chromestatus.com/feature/5436441440026624
> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fchromestatus.com%2Ffeature%2F5436441440026624&data=04%7C01%7Cdaniec%40microsoft.com%7C2a12427c7e9e481ecaa308d95c5061c5%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637642322580656862%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=IJMDdWVT8l26gAsifKvSuBSs%2FvrrSaABLT0DxYXJtME%3D&reserved=0>
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>
>
> Link to entry on the Chrome Platform Status
>
> https://chromestatus.com/feature/5436441440026624
>
>
> Links to previous Intent discussions
>
> Intent to prototype:
> https://groups.google.com/a/chromium.org/g/blink-dev/c/Ix2u8NHG5Po/m/jjMjWIHXAQAJ
> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgroups.google.com%2Fa%2Fchromium.org%2Fg%2Fblink-dev%2Fc%2FIx2u8NHG5Po%2Fm%2FjjMjWIHXAQAJ&data=04%7C01%7Cdaniec%40microsoft.com%7C2a12427c7e9e481ecaa308d95c5061c5%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637642322580666856%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=mlQ9DkwrjX2a7kORyyRXlWuB2ge8ImPTsnO%2FZ3QTnYY%3D&reserved=0>
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> This intent message was generated by Chrome Platform Status
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> This intent message was generated by Chrome Platform Status
>
> --
> You received this message because you are subscribed to the Google
> Groups "blink-dev" group.
> To unsubscribe from this group and stop receiving emails from it, send
> an email to blink-dev+...@chromium.org
> <mailto:blink-dev+...@chromium.org>.
> To view this discussion on the web visit
> https://groups.google.com/a/chromium.org/d/msgid/blink-dev/BL0PR00MB0435222C2F1E0F4BC013388FC5F99%40BL0PR00MB0435.namprd00.prod.outlook.com
> <https://groups.google.com/a/chromium.org/d/msgid/blink-dev/BL0PR00MB0435222C2F1E0F4BC013388FC5F99%40BL0PR00MB0435.namprd00.prod.outlook.com?utm_medium=email&utm_source=footer>.
Daniel Clark
Aug 12, 2021, 6:36:17 PM8/12/21
to emi...@mozilla.com, blin...@chromium.org, Fernando Fiori, Bo Cupp, Sanket Joshi (EDGE)
Oh, you're right, I hadn't realized they still have it off by default.
So my mail should have said that WebKit has implemented it but not shipped it.
-----Original Message-----
From: Emilio Cobos Álvarez <emi...@mozilla.com>
Sent: Thursday, August 12, 2021 3:13 PM
To: Daniel Clark <dan...@microsoft.com>; blin...@chromium.org
Cc: Fernando Fiori <ffi...@microsoft.com>; Bo Cupp <pc...@microsoft.com>; Sanket Joshi (EDGE) <sa...@microsoft.com>
Subject: Re: [blink-dev] Intent to Ship: Custom Highlight API
Is Safari actually shipping it? What I see is that they implement it as a (default off) experimental feature, which I don't think qualifies as "shipping" by any means.
-- Emilio
On 8/12/21 23:23, 'Daniel Clark' via blink-dev wrote:
>
> Contact emails
>
> sa...@microsoft.com <mailto:sa...@microsoft.com>, ffi...@microsoft.com
> <mailto:ffi...@microsoft.com>, pc...@microsoft.com
> <mailto:pc...@microsoft.com>, dan...@microsoft.com
> <mailto:dan...@microsoft.com>
>
>
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So my mail should have said that WebKit has implemented it but not shipped it.
-----Original Message-----
From: Emilio Cobos Álvarez <emi...@mozilla.com>
Sent: Thursday, August 12, 2021 3:13 PM
To: Daniel Clark <dan...@microsoft.com>; blin...@chromium.org
Cc: Fernando Fiori <ffi...@microsoft.com>; Bo Cupp <pc...@microsoft.com>; Sanket Joshi (EDGE) <sa...@microsoft.com>
Subject: Re: [blink-dev] Intent to Ship: Custom Highlight API
Is Safari actually shipping it? What I see is that they implement it as a (default off) experimental feature, which I don't think qualifies as "shipping" by any means.
-- Emilio
On 8/12/21 23:23, 'Daniel Clark' via blink-dev wrote:
>
> Contact emails
>
> sa...@microsoft.com <mailto:sa...@microsoft.com>, ffi...@microsoft.com
> <mailto:ffi...@microsoft.com>, pc...@microsoft.com
> <mailto:pc...@microsoft.com>, dan...@microsoft.com
> <mailto:dan...@microsoft.com>
>
>
> Explainer
>
> ub.com%2FMicrosoftEdge%2FMSEdgeExplainers%2Fblob%2Fmain%2Fhighlight%2F
> explainer.md&data=04%7C01%7Cdaniec%40microsoft.com%7C18a8e4ed1ccc4
> 482d4dc08d95dde6345%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C63764
> 4032020524159%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2lu
> MzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=%2FZClTeCRozA8x8hx
> 1c0AodwctVLfVg5Fi7QhZz7RadI%3D&reserved=0
> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgit
> hub.com%2FMicrosoftEdge%2FMSEdgeExplainers%2Fblob%2Fmain%2Fhighlight%2
> Fexplainer.md&data=04%7C01%7Cdaniec%40microsoft.com%7C18a8e4ed1ccc
> 4482d4dc08d95dde6345%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C6376
> 44032020524159%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2l
> uMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=%2FZClTeCRozA8x8h
> x1c0AodwctVLfVg5Fi7QhZz7RadI%3D&reserved=0>
>
>
> Specification
>
> https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdraf
> ts.csswg.org%2Fcss-highlight-api-1%2F&data=04%7C01%7Cdaniec%40micr
> osoft.com%7C18a8e4ed1ccc4482d4dc08d95dde6345%7C72f988bf86f141af91ab2d7
> cd011db47%7C1%7C0%7C637644032020524159%7CUnknown%7CTWFpbGZsb3d8eyJWIjo
> iMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&
> ;sdata=CtIZuZYQJrML4h5ElG4jzcszVVLEDJujzJs7wcZgQFk%3D&reserved=0
> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdra
> fts.csswg.org%2Fcss-highlight-api-1%2F&data=04%7C01%7Cdaniec%40mic
> rosoft.com%7C18a8e4ed1ccc4482d4dc08d95dde6345%7C72f988bf86f141af91ab2d
> 7cd011db47%7C1%7C0%7C637644032020524159%7CUnknown%7CTWFpbGZsb3d8eyJWIj
> oiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&am
> p;sdata=CtIZuZYQJrML4h5ElG4jzcszVVLEDJujzJs7wcZgQFk%3D&reserved=0>
>
>
> Summary
>
> The custom highlight API provides a way for web developers to style
> the text of arbitrary ranges. This is useful in a variety of
> scenarios, including editing frameworks that wish to implement their
> own selection, find-on-page over virtualized documents, multiple
> selections to represent online collaboration, or spellchecking frameworks.
>
>
> Blink component
>
> Blink>Editing
> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fbug
> s.chromium.org%2Fp%2Fchromium%2Fissues%2Flist%3Fq%3Dcomponent%3ABlink%
> 253EEditing&data=04%7C01%7Cdaniec%40microsoft.com%7C18a8e4ed1ccc44
>
> Summary
>
> The custom highlight API provides a way for web developers to style
> the text of arbitrary ranges. This is useful in a variety of
> scenarios, including editing frameworks that wish to implement their
> own selection, find-on-page over virtualized documents, multiple
> selections to represent online collaboration, or spellchecking frameworks.
>
>
> Blink component
>
> Blink>Editing
> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fbug
> s.chromium.org%2Fp%2Fchromium%2Fissues%2Flist%3Fq%3Dcomponent%3ABlink%
> 82d4dc08d95dde6345%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637644
> 032020524159%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luM
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> Iq73fXLvxsTnMFVVZ4ZGyB0z0HQpEs%3D&reserved=0>
>
>
> Search tags
>
> Custom Highlight API
> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fchr
> omestatus.com%2Ffeatures%23tags%3ACustom%2520Highlight%2520API&dat
>
> Search tags
>
> Custom Highlight API
> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fchr
> a=04%7C01%7Cdaniec%40microsoft.com%7C18a8e4ed1ccc4482d4dc08d95dde6345%
> 7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637644032020524159%7CUnkn
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> N%2BD7aYU%3D&reserved=0>,
> Highlight API
> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fchr
> omestatus.com%2Ffeatures%23tags%3AHighlight%2520API&data=04%7C01%7
> Cdaniec%40microsoft.com%7C18a8e4ed1ccc4482d4dc08d95dde6345%7C72f988bf8
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> p;reserved=0>
>
>
> TAG review
>
> https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgith
> ub.com%2Fw3ctag%2Fdesign-reviews%2Fissues%2F584&data=04%7C01%7Cdan
> iec%40microsoft.com%7C18a8e4ed1ccc4482d4dc08d95dde6345%7C72f988bf86f14
> 1af91ab2d7cd011db47%7C1%7C0%7C637644032020534152%7CUnknown%7CTWFpbGZsb
> 3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%
> 7C1000&sdata=RymFBBO5TL%2BCd5lNhbxyFWE4VBfvsyMHwU2eMrp3XxQ%3D&
> reserved=0
> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgit
> hub.com%2Fw3ctag%2Fdesign-reviews%2Fissues%2F584&data=04%7C01%7Cda
> niec%40microsoft.com%7C18a8e4ed1ccc4482d4dc08d95dde6345%7C72f988bf86f1
> 41af91ab2d7cd011db47%7C1%7C0%7C637644032020534152%7CUnknown%7CTWFpbGZs
> b3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D
> %7C1000&sdata=RymFBBO5TL%2BCd5lNhbxyFWE4VBfvsyMHwU2eMrp3XxQ%3D&
> ;reserved=0>
>
>
> TAG review status
>
> Issues addressed
>
>
> Risks
>
>
> Interoperability and Compatibility
>
> Low: This feature received positive support from Safari and Firefox at
> TPAC 2019. Safari has implemented the feature.
>
>
>
> /Gecko/: No signal
> (https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgit
>
> TAG review status
>
> Issues addressed
>
>
> Risks
>
>
> Interoperability and Compatibility
>
> Low: This feature received positive support from Safari and Firefox at
> TPAC 2019. Safari has implemented the feature.
>
>
>
> /Gecko/: No signal
> hub.com%2Fmozilla%2Fstandards-positions%2Fissues%2F482&data=04%7C0
> 1%7Cdaniec%40microsoft.com%7C18a8e4ed1ccc4482d4dc08d95dde6345%7C72f988
> bf86f141af91ab2d7cd011db47%7C1%7C0%7C637644032020534152%7CUnknown%7CTW
> FpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6
> Mn0%3D%7C1000&sdata=v6tkqxZXJAGTwR5fyCF2M767AO4CAcSTYo70X6JoE1w%3D
> &reserved=0
> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fchr
> omestatus.com%2Fadmin%2Ffeatures%2Flaunch%2F5436441440026624%2F5%3Fint
> ent%3D1&data=04%7C01%7Cdaniec%40microsoft.com%7C18a8e4ed1ccc4482d4
> dc08d95dde6345%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C6376440320
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> qiwb12lwE%2Byi6Io96M%2BMwcz4%3D&reserved=0>)
>
> /WebKit/: Shipped/Shipping
> (https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdev
> eloper.apple.com%2Fsafari%2Ftechnology-preview%2Frelease-notes%2F&
> data=04%7C01%7Cdaniec%40microsoft.com%7C18a8e4ed1ccc4482d4dc08d95dde63
> 45%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637644032020534152%7CU
> nknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1ha
> WwiLCJXVCI6Mn0%3D%7C1000&sdata=B0Mq2lj6VCppjqdBkA5AMV%2FPn4J19xNPA
> 9ttkz7y6Hw%3D&reserved=0
> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdev
> eloper.apple.com%2Fsafari%2Ftechnology-preview%2Frelease-notes%2F&
> data=04%7C01%7Cdaniec%40microsoft.com%7C18a8e4ed1ccc4482d4dc08d95dde63
> 45%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637644032020534152%7CU
> nknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1ha
> WwiLCJXVCI6Mn0%3D%7C1000&sdata=B0Mq2lj6VCppjqdBkA5AMV%2FPn4J19xNPA
> 9ttkz7y6Hw%3D&reserved=0>) Highlight API listed in Release 99
> notes.
>
> /Web developers/: Strongly positive
> (https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgit
>
> /Web developers/: Strongly positive
> hub.com%2Fw3c%2Fcsswg-drafts%2Fissues%2F4307&data=04%7C01%7Cdaniec
> %40microsoft.com%7C18a8e4ed1ccc4482d4dc08d95dde6345%7C72f988bf86f141af
> 91ab2d7cd011db47%7C1%7C0%7C637644032020534152%7CUnknown%7CTWFpbGZsb3d8
> eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1
> 000&sdata=GL1atWVnvDso%2BKMxr2uPSVOAMYNW%2BCwkxKCe7gSNEYM%3D&r
> eserved=0
> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgit
> hub.com%2Fw3c%2Fcsswg-drafts%2Fissues%2F4307&data=04%7C01%7Cdaniec
> %40microsoft.com%7C18a8e4ed1ccc4482d4dc08d95dde6345%7C72f988bf86f141af
> 91ab2d7cd011db47%7C1%7C0%7C637644032020534152%7CUnknown%7CTWFpbGZsb3d8
> eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1
> 000&sdata=GL1atWVnvDso%2BKMxr2uPSVOAMYNW%2BCwkxKCe7gSNEYM%3D&r
> eserved=0>) Multiple use cases have been pointed out in this issue.
> CKEditor has also shown support from the first highlight API
> explainer.
>
>
> Ergonomics
>
>
> The highlight API will be the first use case for constructible
> StaticRanges, which the API permits as an alternative to Iive
> Ranges because they do not incur cost during DOM mutations.
>
>
> Activation
>
> No. Web developers should be able to use the feature as-is. It is also
> easy to feature detect (checking for the existence of CSS.highlights).
>
>
> Debuggability
>
> DevTools shows ::highlight pseudo elements, in the same way that it
> shows other pseudo elements.
>
>
> Is this feature fully tested by web-platform-tests
> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fchromium.googlesource.com%2Fchromium%2Fsrc%2F%2B%2Fmaster%2Fdocs%2Ftesting%2Fweb_platform_tests.md&data=04%7C01%7Cdaniec%40microsoft.com%7C18a8e4ed1ccc4482d4dc08d95dde6345%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637644032020534152%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=L5OWLfk0JNSnsaK6JnczypT6EBpt8eVkKIKJfg41dzc%3D&reserved=0>?
> CKEditor has also shown support from the first highlight API
> explainer.
>
>
> Ergonomics
>
>
> The highlight API will be the first use case for constructible
> StaticRanges, which the API permits as an alternative to Iive
> Ranges because they do not incur cost during DOM mutations.
>
>
> Activation
>
> No. Web developers should be able to use the feature as-is. It is also
> easy to feature detect (checking for the existence of CSS.highlights).
>
>
> Debuggability
>
> DevTools shows ::highlight pseudo elements, in the same way that it
> shows other pseudo elements.
>
>
> Is this feature fully tested by web-platform-tests
>
> Yes
> https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwpt.
> fyi%2Fresults%2Fcss%2Fcss-highlight-api%3Flabel%3Dmaster%26label%3Dexp
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> ed=0>
>
>
> Flag name
>
> --enable-blink-features=HighlightAPI
>
>
> Requires code in //chrome?
>
> False
>
>
> Tracking bug
>
> https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fcrbu
>
>
> Flag name
>
> --enable-blink-features=HighlightAPI
>
>
> Requires code in //chrome?
>
> False
>
>
> Tracking bug
>
> g.com%2F1164461&data=04%7C01%7Cdaniec%40microsoft.com%7C18a8e4ed1c
> cc4482d4dc08d95dde6345%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C63
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>
>
> Estimated milestones
>
> *Comments:*
>
>
> Highlight API does not yet support all of the pseudos at
> https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.w3.org%2FTR%2Fcss-pseudo-4%2F%23highlight-styling&data=04%7C01%7Cdaniec%40microsoft.com%7C18a8e4ed1ccc4482d4dc08d95dde6345%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637644032020544145%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=fHiCT6iUl%2BlsKJF4b1bt9EGkj9V7p9tQXb2luDjJYaY%3D&reserved=0
>
> Estimated milestones
>
> *Comments:*
>
>
> Highlight API does not yet support all of the pseudos at
> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.w3.org%2FTR%2Fcss-pseudo-4%2F%23highlight-styling&data=04%7C01%7Cdaniec%40microsoft.com%7C18a8e4ed1ccc4482d4dc08d95dde6345%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637644032020544145%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=fHiCT6iUl%2BlsKJF4b1bt9EGkj9V7p9tQXb2luDjJYaY%3D&reserved=0>--
> the current implementation only supports color and
> background-color. However, we believe there is value in shipping
> starting with just these styles, since they are sufficient to
> support key scenarios like custom find-on-page.
>
>
> Link to entry on the Chrome Platform Status
>
> https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fchro
> background-color. However, we believe there is value in shipping
> starting with just these styles, since they are sufficient to
> support key scenarios like custom find-on-page.
>
>
> Link to entry on the Chrome Platform Status
>
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> ved=0>
>
>
> Links to previous Intent discussions
>
> Intent to prototype:
> https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgrou
>
>
> Links to previous Intent discussions
>
> Intent to prototype:
> ps.google.com%2Fa%2Fchromium.org%2Fg%2Fblink-dev%2Fc%2FIx2u8NHG5Po%2Fm
> %2FjjMjWIHXAQAJ&data=04%7C01%7Cdaniec%40microsoft.com%7C18a8e4ed1c
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> P%2Bvh2oCMsS6x7xc4N4Y80lLjQ9hCM%3D&reserved=0>
>
> This intent message was generated by Chrome Platform Status
> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.chromestatus.com%2F&data=04%7C01%7Cdaniec%40microsoft.com%7C18a8e4ed1ccc4482d4dc08d95dde6345%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637644032020544145%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=jXBqdPRVUTHR94BBKnmqtMMjtuqiMuqJISSP0VB3d%2F0%3D&reserved=0>.
> This intent message was generated by Chrome Platform Status
>
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> 35222C2F1E0F4BC013388FC5F99%2540BL0PR00MB0435.namprd00.prod.outlook.co
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> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgroups.google.com%2Fa%2Fchromium.org%2Fd%2Fmsgid%2Fblink-dev%2FBL0PR00MB0435222C2F1E0F4BC013388FC5F99%2540BL0PR00MB0435.namprd00.prod.outlook.com%3Futm_medium%3Demail%26utm_source%3Dfooter&data=04%7C01%7Cdaniec%40microsoft.com%7C18a8e4ed1ccc4482d4dc08d95dde6345%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637644032020544145%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=G4GreSthT%2F8zw%2FyIZHNIlUH6xU4HVaGG6gFg7W5nPlo%3D&reserved=0>.
Rick Byers
Aug 13, 2021, 11:57:59 AM8/13/21
to Daniel Clark, emi...@mozilla.com, blin...@chromium.org, Fernando Fiori, Bo Cupp, Sanket Joshi (EDGE)
LGTM1 - looks great to me!
Rick
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Florian Rivoal
Aug 13, 2021, 5:31:49 PM8/13/21
to Daniel Clark, blin...@chromium.org, Fernando Fiori, Bo Cupp, Sanket Joshi (EDGE), Delan Azabani
Hi all!
Being
one of the co-editors of this spec, I'm super happy about this getting
traction… but I think shipping is a little bit premature:
* We have a few open issues on the spec. https://github.com/w3c/csswg-drafts/labels/css-highlight-api-1
Most of them should be pretty easy, and I'm happy to prioritize them.
It seems better to get the API / behavior to be stable and then ship rather than the other way around.
* One of the open issues is possibly not easy,
but important: it has not yet been determined how this was supposed to
work with screen-readers and other assistive technologies. I think this
ought to be given serious thoughts, and probably should be solved before
shipping https://github.com/w3c/csswg-drafts/issues/6498 / https://github.com/w3c/csswg-drafts/issues/4601
* The custom highlights defined by this API are highlights, as defined in https://drafts.csswg.org/css-pseudo-4/#highlight-pseudos,
and Chrome's current behavior is actually far from spec compliant here.
Luckily, this is in the process of being fixed, but shipping custom
highights before landing those fixes risks causing a compat problem: if
people start to use custom highlight with the current/broken cascading
and painting model, and then we fix it, that's liable to cause plenty of
annoyances. As long as fixing those is considered a dependency for this
intent to ship, then that's great, but shipping the API first and
fixing the behavior later is maybe not so great. See at least https://bugs.chromium.org/p/chromium/issues/detail?id=1147859
—Florian
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Daniel Clark
Aug 17, 2021, 12:27:04 PM8/17/21
to flo...@rivoal.net, blin...@chromium.org, Fernando Fiori, Bo Cupp, Sanket Joshi (EDGE), daza...@igalia.com
Thanks Florian for your thoughts on this!
> We have a few open issues on the spec. https://github.com/w3c/csswg-drafts/labels/css-highlight-api-1
Makes sense, we’ll work on driving down these issues in CSSWG before shipping, and we’ll make sure that we have at least a clearer plan regarding accessibility for the API. I’ll update this thread when more progress has been made here.
> The custom highlights defined by this API are highlights, as defined in https://drafts.csswg.org/css-pseudo-4/#highlight-pseudos, and Chrome's current behavior is actually far from spec compliant here.
Our thinking on this is that this first version of the Highlight API is mainly useful for scenarios like custom find-on-page where highlights use simple formatting (like background-color and color), and overlapping highlight ranges are not common. So, we don’t expect the discrepancies between the Chromium implementation and the highlight pseudos specs to be a big issue. For example, many of these longstanding highlight painting issues exist with the browser’s current find-on-page implementation, but in practice they are minimally disruptive.
So our thinking is that fixing these highlight painting issues in the future would not cause significant breakage for sites built using the current capabilities of the API. Thus I’m hesitant to conclude that this reworking of the highlight painting code should be a blocker for shipping the API.
From: Florian Rivoal <flo...@rivoal.net>
Sent: Friday, August 13, 2021 2:32 PM
To: Daniel Clark <dan...@microsoft.com>
Cc: blin...@chromium.org; Fernando Fiori <ffi...@microsoft.com>; Bo Cupp <pc...@microsoft.com>; Sanket Joshi (EDGE) <sa...@microsoft.com>; Delan Azabani <daza...@igalia.com>
Subject: Re: [blink-dev] Intent to Ship: Custom Highlight API
Hi all!
Daniel Clark
Aug 17, 2021, 12:30:00 PM8/17/21
to rby...@chromium.org, emi...@mozilla.com, blin...@chromium.org, Fernando Fiori, Bo Cupp, Sanket Joshi (EDGE)
Thanks Rick!
Yes, I definitely think that the browser’s built-in find-on-page could be redefined using this. In Chromium at least they are already implemented using some of the same structures (DocumentMarker for keeping track of highlight positions). I think further down the line it could be worthwhile to look at fully transitioning things like find-on-page to Highlight API.
-- Dan
From: Rick Byers <rby...@chromium.org>
Sent: Friday, August 13, 2021 8:58 AM
To: Daniel Clark <dan...@microsoft.com>
Delan Azabani
Aug 18, 2021, 12:15:19 PM8/18/21
to blink-dev, Daniel Clark, blin...@chromium.org, Fernando Fiori, Bo Cupp, Sanket Joshi (Edge), Delan Azabani, flo...@rivoal.net
I’m also excited to see this feature ship, as it’s pretty relevant to our work at Igalia, but I feel I must share and expand on Florian’s concerns about our current behaviour.
On Wednesday, August 18, 2021 at 12:27:04 AM UTC+8 Daniel Clark wrote:
Our thinking on this is that this first version of the Highlight API is mainly useful for scenarios like custom find-on-page where highlights use simple formatting (like background-color and color), and overlapping highlight ranges are not common. So, we don’t expect the discrepancies between the Chromium implementation and the highlight pseudos specs to be a big issue. For example, many of these longstanding highlight painting issues exist with the browser’s current find-on-page implementation, but in practice they are minimally disruptive. […] Thus I’m hesitant to conclude that this reworking of the highlight painting code should be a blocker for shipping the API.
Note that it’s not just paint that’s broken, but style too, primarily because we don’t yet impl highlight inheritance. Also, surely even the proposed subset of background-color and color would have uses beyond find-on-page, like multiple selections for online collaboration?
It’s one thing to ship with missing features that we can easily
add later (such as text-decoration support, more or less), or with bugs of minor
consequence (such as <https://crbug.com/1179938>). But do we really want to be the first engine to ship this feature, with an impl that’s broken under
the spec’s very first example [0][1], color on ligature-heavy scripts (despite
working in ::selection) [2], and even ancient features like
::first-letter [3]?
Each of these bugs, if shipped and fixed later, has some impact — however small — on things like compat, author confidence, and even tutorial content. For example, strictly speaking, impl’ing highlight inheritance will break what [4] has to say about text-shadow. Fixing them after the fact in ::selection (currently a separate impl) has proven painful, because chipping away at a big problem over multiple patches has caused regressions [5].
I think it was a mistake for Blink to ship ::target-text in this kind of state, and given the wider range of use cases that ::highlight
aims to solve, I think it would be at least as much of a mistake here.
[0] https://drafts.csswg.org/css-highlight-api-1/#intro-ex
[1] https://bucket.daz.cat/work/igalia/1/1.html
[2] https://bucket.daz.cat/work/igalia/1/2.html
[3] https://bucket.daz.cat/work/igalia/1/3.html
[1] https://bucket.daz.cat/work/igalia/1/1.html
[2] https://bucket.daz.cat/work/igalia/1/2.html
[3] https://bucket.daz.cat/work/igalia/1/3.html
Cheers,
Delan Azabani
Igalia // web platform
Florian Rivoal
Aug 18, 2021, 9:30:06 PM8/18/21
to Delan Azabani, blink-dev, Daniel Clark, Fernando Fiori, Bo Cupp, Sanket Joshi (Edge)
On Aug 19, 2021, at 1:15, Delan Azabani <daza...@igalia.com> wrote:I’m also excited to see this feature ship, as it’s pretty relevant to our work at Igalia, but I feel I must share and expand on Florian’s concerns about our current behaviour.On Wednesday, August 18, 2021 at 12:27:04 AM UTC+8 Daniel Clark wrote:Our thinking on this is that this first version of the Highlight API is mainly useful for scenarios like custom find-on-page where highlights use simple formatting (like background-color and color), and overlapping highlight ranges are not common. So, we don’t expect the discrepancies between the Chromium implementation and the highlight pseudos specs to be a big issue. For example, many of these longstanding highlight painting issues exist with the browser’s current find-on-page implementation, but in practice they are minimally disruptive. […] Thus I’m hesitant to conclude that this reworking of the highlight painting code should be a blocker for shipping the API.Note that it’s not just paint that’s broken, but style too, primarily because we don’t yet impl highlight inheritance. Also, surely even the proposed subset of background-color and color would have uses beyond find-on-page, like multiple selections for online collaboration?It’s one thing to ship with missing features that we can easily add later (such as text-decoration support, more or less), or with bugs of minor consequence (such as <https://crbug.com/1179938>). But do we really want to be the first engine to ship this feature, with an impl that’s broken under the spec’s very first example [0][1], color on ligature-heavy scripts (despite working in ::selection) [2], and even ancient features like ::first-letter [3]?Each of these bugs, if shipped and fixed later, has some impact — however small — on things like compat, author confidence, and even tutorial content. For example, strictly speaking, impl’ing highlight inheritance will break what [4] has to say about text-shadow. Fixing them after the fact in ::selection (currently a separate impl) has proven painful, because chipping away at a big problem over multiple patches has caused regressions [5].
I suspect that shipping with some amount of paint bugs is probably tolerable (although I would prefer if we could deal with the worst offenders), but that we really ought to block on fixing the style part. Otherwise, the API is pretty much unusable as soon as you want to start writing styles that apply to less than the whole page (or if you manage to work around the limitations, you'll end up with content that breaks once we fix the implementation).
I think it was a mistake for Blink to ship ::target-text in this kind of state, and given the wider range of use cases that ::highlight aims to solve, I think it would be at least as much of a mistake here.[0] https://drafts.csswg.org/css-highlight-api-1/#intro-ex
[1] https://bucket.daz.cat/work/igalia/1/1.html
[2] https://bucket.daz.cat/work/igalia/1/2.html
[3] https://bucket.daz.cat/work/igalia/1/3.htmlCheers,Delan AzabaniIgalia // web platform
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Manuel Rego Casasnovas
Sep 2, 2021, 7:09:25 AM9/2/21
to Delan Azabani, blink-dev, Daniel Clark, Fernando Fiori, Bo Cupp, Sanket Joshi (Edge), flo...@rivoal.net
On 18/08/2021 18:15, Delan Azabani wrote:
> I think it was a mistake for Blink to ship ::target-text in this kind of
> state, and given the wider range of use cases that ::highlight aims to
> solve, I think it would be at least as much of a mistake here.
::target-text has a bunch of known issues, but sadly it's already shipped.
But this is a way bigger API, that will allow web authors to add
highlights all over the page. It's a really nice one, but even limiting
it to color and background-color properties, there are a bunch of issues
that we should solve before shipping. Otherwise people could start to
depend on behaviors that are going to change (like inheritance), or find
that the API is not useful for some simple cases and discard it, or
whatever.
We've collected examples that have issues in the current highlight
implementation: <https://codepen.io/dazabani13/pen/KKqzOJp>
Delan has been working on adding support for ::spelling|grammar-error.
These pseudos have many of the same issues, as they use DocumentMarkers
like custom highlights. She has been fixing some of them, but the work
is still ongoing. Anyway probably not all the issues need to be fixed
before shipping.
If you're interested, we've started writing a design doc that explores
the topic in more detail:
<https://docs.google.com/document/d/1Rfelx4qv-RhQYHUJ74QBU5MjEbmb9Wol9gvyjkywqgE>
Cheers,
Rego
Rick Byers
Sep 7, 2021, 9:05:26 PM9/7/21
to Manuel Rego Casasnovas, Delan Azabani, blink-dev, Daniel Clark, Fernando Fiori, Bo Cupp, Sanket Joshi (Edge), flo...@rivoal.net
Thanks for all the additional discussion and context. I wasn't aware of what a shaky ground we were on here today. I agree with the conclusion that we should firm it up somewhat before shipping this new API. So consider my LGTM rescinded for now. But please come back once you feel the highlighting foundation is solid enough to be safe to build upon.
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