MARKLESS_COMPONENT_PROP_EXPRESSION_UNSUPPORTED
A prop expression that reads state needs a route the child can follow: a Markless compiler error.
Error from the compiler, while it builds your .tsrx files.
What happened
Markless prints the message, the reason, and a suggestion:
MARKLESS_COMPONENT_PROP_EXPRESSION_UNSUPPORTED: Prop `<propName>` on `<<childComponentName>>` is written as `<source>`, which reads state but is not an expression this compiler can route.
A child reads a prop through the graph node the parent named. An expression with no node behind it can only be seeded once, from whatever the value happened to be at render - so the child would show a stale value forever and nothing would say so.
Pass a value the compiler can follow: a plain read (`group.value`), or an expression built only from reads, operators and method calls on those reads (`group.value.includes(item.value)`). If the value needs a function of your own, put that function inside a `computed()` and pass the computed.
https://markless.dev/errors/MARKLESS_COMPONENT_PROP_EXPRESSION_UNSUPPORTEDWords in angle brackets change from case to case.
How to fix it
Start with the suggestion in the message above.
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Where it comes from
@markless/compiler raises this code. Source:
Read how to read a Markless error, or go back to all error codes.