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[css-inline] Allow background of an inline area to extend to before-and after-edges of the line area · Issue #1974 · w3c/csswg-drafts · GitHub
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[css-inline] Allow background of an inline area to extend to before-and after-edges of the line area #1974

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Description

Per the 20171109 joint TTWG/CSS meeting

As illustrated at fillLineGap.pdf, a common captioning style requires the background of inline areas to extend to the before-and after-edges of the containing line area. This styling capability is not currently supported by CSS.

This capability mirrors the itts:fillLineGap styling attribute at https://www.w3.org/TR/ttml-imsc1.0.1/#itts-fillLineGap

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