DioxusLabs/dioxus · error · syn::Error

Unknown option for component macro

Error message

Unknown option for component macro

What it means

Error "Unknown option for component macro" thrown in DioxusLabs/dioxus.

Source

Thrown at packages/core-macro/src/component.rs:652

#[derive(Default)]
pub struct ComponentMacroOptions {
    pub lazy: bool,
}

impl Parse for ComponentMacroOptions {
    fn parse(input: ParseStream) -> Result<Self> {
        let mut lazy_load = false;

        while !input.is_empty() {
            let ident = input.parse::<Ident>()?;
            let ident_name = ident.to_string();
            if ident_name == "lazy" {
                lazy_load = true;
            } else if ident_name == "no_case_check" {
                // we used to have this?
            } else {
                return Err(Error::new(
                    ident.span(),
                    "Unknown option for component macro",
                ));
            }

            if input.peek(Token![,]) {
                input.parse::<Token![,]>()?;
            }
        }

        Ok(Self { lazy: lazy_load })
    }
}

View on GitHub (pinned to 393d190a80)

When it happens

Trigger: Thrown at packages/core-macro/src/component.rs:652 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of DioxusLabs/dioxus@393d190a80 (2026-08-16). Data as JSON: /api/errors/9f3eaf03651a187e. Report an issue: GitHub.