HEEx attribute value in quotes send less data than values in braces

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The websocket diff update for data-quotes={"#{@value}"} sends '123'.

The websocket diff update for data-braces={@value} sends ' data-braces="123"'.

value = "123"
~H"""
<div data-quotes={"#{@value}"} data-braces={@value} />
"""

Is there a documentation about optimizations like this?

2

I would guess that is a way to let you nil the value and not get the attribute?

Empty attribute string vs no attribute set.

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This also isn’t actually an optimization. Boolean attributes even with empty “value” are still considered to be true or set: Boolean attribute (HTML) - Glossary | MDN

The only way to make them be false is by not rendering the attribute at all.

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