Comments (3)
You are right, null
and undefined
are described only for attributes, so I need to update the documentation to describe the null
and undefined
behavior as hole, and also the fact that every primitive, not just string
, would land as text.
Will create a ticket in the right repository, thanks for pointing this out.
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A common pattern is also to render true
or false
, but even more common is to use ternary:
wire()`${true ? 'test' : ''}`; // test
wire()`${false ? 'test' : ''}`; //
Since documentation explains that null
or undefined
are handled as empty strings, if you want to use:
wire()`${value && 'test'}`
then pass either null
or any truthy as value.
As summary, it's been like this since 2017, and nobody complained so far, so this is a major breaking change that I'm not willing to push unless many others would find current documented behavior not good enough.
from hyperhtml.
I don't see where the documentation explains that null
or undefined
are handled as empty strings.
That false
renders as a string, and thus can't be used directly in conditional rendering, is likely to confuse people coming from React, given they officially recommend this pattern.
I understand fixing this would be a breaking change, and others have not yet raised it as a concern, and it has trivial workarounds, and thus you aren't inclined to fix it. Still, documenting the current behavior more explicitly might be worthwhile.
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