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I'm submitting this tiny change to improve conditional rendering.
Currently, only "None" nodes are skipped.
This is useful to implement conditional rendering based on a nullable variable, as shown in the docs.
print(div[error and b[error]])
Unfortunately, most conditional rendering often relies on a boolean condition, and in this case, you can't do
print(div[has_error and b[error_msg]])
because you will get an errorValueError: False is not a valid child element
The current best way to have conditional rendering based on a boolean is to adopt the ternary operator
print(div[b[error_msg] if has_error else None])
.Drawbacks are:
else None
part all the time, which is tediousThe suggested change aims to allow the
print(div[has_error and b[error_msg]])
syntax for boolean conditional rendering.