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CSP: Hide wrapper span with class instead of style attribute #581

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CSP: Hide wrapper span with class instead of style attribute #581

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70521d2
Add nonce to styled span
JohanWinther Jun 22, 2022
4c1b33d
Use class `elm-css-style-wrapper` to hide wrapper span
JohanWinther Jun 25, 2022
ff36d64
Don't override existing value in dict
JohanWinther Jun 25, 2022
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16 changes: 11 additions & 5 deletions src/VirtualDom/Styled.elm
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Original file line number Diff line number Diff line change
Expand Up @@ -31,6 +31,7 @@ module VirtualDom.Styled exposing
, unstyledNode
)

import Css
import Css.Preprocess as Preprocess exposing (Style)
import Css.Preprocess.Resolve as Resolve
import Css.Structure as Structure
Expand Down Expand Up @@ -479,13 +480,18 @@ toKeyedStyleNode maybeNonce allStyles keyedChildNodes =

toStyleNode : Maybe Nonce -> Dict CssTemplate Classname -> VirtualDom.Node msg
toStyleNode maybeNonce styles =
-- wrap the style node in a div to prevent `Dark Reader` from blowin up the dom.
let
styleWrapperClass =
"elm-css-style-wrapper"
in
-- wrap the style node in a span to prevent `Dark Reader` from blowin up the dom.
VirtualDom.node "span"
[ VirtualDom.attribute "style" "display: none;"
, VirtualDom.attribute "class" "elm-css-style-wrapper"
]
[ VirtualDom.attribute "class" styleWrapperClass ]
[ -- this <style> node will be the first child of the requested one
toDeclaration styles
styles
|> toDeclaration
-- add css to hide the wrapper span
|> styleToDeclaration (getCssTemplate [ Css.display Css.none ]) styleWrapperClass
|> VirtualDom.text
|> List.singleton
|> VirtualDom.node "style"
Expand Down