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https://issues.apache.org/jira/browse/SLING-7024?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16107060#comment-16107060
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Konrad Windszus commented on SLING-7024:
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Also the same limitation doesn't apply if multiple attributes are set at the
same time, i.e. for the case when {{attributeName}} is {{null}} in
https://github.com/apache/sling/blob/4df9ab2d6592422889c71fa13afd453a10a5a626/bundles/scripting/sightly/compiler/src/main/java/org/apache/sling/scripting/sightly/impl/plugin/AttributePlugin.java#L71.
> Sightly doesn't allow to emit style attributes for `data-sly-attribute`
> -----------------------------------------------------------------------
>
> Key: SLING-7024
> URL: https://issues.apache.org/jira/browse/SLING-7024
> Project: Sling
> Issue Type: Bug
> Components: Scripting
> Affects Versions: Scripting HTL Compiler 1.0.8
> Reporter: Konrad Windszus
> Assignee: Radu Cotescu
>
> For the following Sightly script
> {code}
> <a data-sly-attribute.style="${'background-color: #00ff00' @
> context='style-token'}"></a>
> {code}
> The generated a element will not contain a style attribute.
> Instead the following error is emitted in the log
> {code}
> 31.07.2017 09:26:12.448 *WARN* [172.19.0.1 [1501493172400] GET /<some URL>
> HTTP/1.1] org.apache.sling.scripting.sightly.impl.engine.SightlyScriptEngine
> Script <some script path> 11:32: ${'background-color: #00ff00' @
> context='style-token'}: Refusing to generate attribute 'style' for security
> reasons.
> {code}
> This is unexpected as neither the HTL spec
> (https://github.com/Adobe-Marketing-Cloud/htl-spec/blob/master/SPECIFICATION.md#223-attribute)
> nor the adobe documentation at
> https://docs.adobe.com/docs/en/htl/docs/block-statements.html#attribute
> mentions that. Please either document that or rather lift that limitation.
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