oxc-project/oxc · error · OxcDiagnostic

Assign object to a variable before exporting as module defau

Error message

Assign object to a variable before exporting as module default

What it means

Fires from import/no-anonymous-default-export when the default export is an inline object literal and allowObject is false. The message instructs assigning the object to a variable first so the export has an identifiable name in stack traces and tooling.

Source

Thrown at crates/oxc_linter/src/rules/import/no_anonymous_default_export.rs:163

                if !self.allow_anonymous_class && class_decl.id.is_none() =>
            {
                ctx.diagnostic(no_anonymous_default_export_diagnostic(
                    export_decl.span,
                    "Unexpected default export of anonymous class",
                ));
            }
            ExportDefaultDeclarationKind::ArrowFunctionExpression(_)
                if !self.allow_arrow_function =>
            {
                ctx.diagnostic(no_anonymous_default_export_diagnostic(
                    export_decl.span,
                    "Assign arrow function to a variable before exporting as module default",
                ));
            }
            ExportDefaultDeclarationKind::ObjectExpression(_) if !self.allow_object => {
                ctx.diagnostic(no_anonymous_default_export_diagnostic(
                    export_decl.span,
                    "Assign object to a variable before exporting as module default",
                ));
            }
            ExportDefaultDeclarationKind::CallExpression(_) if !self.allow_call_expression => {
                ctx.diagnostic(no_anonymous_default_export_diagnostic(
                    export_decl.span,
                    "Assign call result to a variable before exporting as module default",
                ));
            }
            ExportDefaultDeclarationKind::NewExpression(_) if !self.allow_new => {
                ctx.diagnostic(no_anonymous_default_export_diagnostic(
                    export_decl.span,
                    "Assign instance to a variable before exporting as module default",
                ));
            }
            ExportDefaultDeclarationKind::ArrayExpression(_) if !self.allow_array => {
                ctx.diagnostic(no_anonymous_default_export_diagnostic(
                    export_decl.span,
                    "Assign array to a variable before exporting as module default",

View on GitHub (pinned to e1e7af627c)

Solutions

1. Assign the object to a named const, then export default that variable
2. Enable `allowObject` if anonymous object default exports are acceptable

When it happens

Trigger: Thrown at crates/oxc_linter/src/rules/import/no_anonymous_default_export.rs:163 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of oxc-project/oxc@e1e7af627c (2026-08-20). Data as JSON: /api/errors/a742ae754e700b6a. Report an issue: GitHub.