Enum EventKind 

pub enum EventKind {
    AmbiguousExternalNamespaceError = 0,
    CircularDependency = 1,
    CircularReexportError = 2,
    Eval = 3,
    IllegalIdentifierAsNameError = 4,
    InvalidExportOptionError = 5,
    InvalidOptionError = 6,
    MissingExportError = 7,
    MissingGlobalName = 8,
    MissingNameOptionForIifeExport = 9,
    InvalidAnnotation = 10,
    MixedExports = 11,
    ParseError = 12,
    UnresolvedEntry = 13,
    UnresolvedImport = 14,
    FilenameConflict = 15,
    FilenameOutsideOutputDirectoryError = 16,
    FileNotFoundError = 17,
    AssignToImportError = 18,
    CommonJsVariableInEsm = 19,
    ImportIsUndefined = 20,
    UnsupportedFeatureError = 21,
    EmptyImportMeta = 22,
    JsonParseError = 23,
    IllegalReassignmentError = 24,
    InvalidDefineConfigError = 25,
    ResolveError = 26,
    UnhandleableError = 27,
    UnloadableDependencyError = 28,
    TransformError = 29,
    ToleratedTransform = 30,
    NapiError = 31,
    CannotCallNamespace = 32,
    ConfigurationFieldConflict = 33,
    PreferBuiltinFeature = 34,
    BundlerInitializeError = 35,
    PluginError = 36,
    AlreadyClosedError = 37,
    CouldNotCleanDirectory = 38,
    PluginTimings = 39,
    DuplicateShebang = 40,
    TsConfigError = 41,
    UnsupportedTsconfigOption = 42,
    RuntimeModuleSymbolNotFoundError = 43,
    IneffectiveDynamicImport = 45,
    RequireTlaError = 46,
    LargeBarrelModules = 47,
    SourcemapBroken = 48,
}

Variants

AmbiguousExternalNamespaceError = 0

CircularDependency = 1

Whether to emit warnings when detecting circular dependency.

Circular dependencies lead to a bigger bundle size and sometimes cause execution order issues and are better to avoid.

{@include ../docs/checks-circular-dependency.md}

CircularReexportError = 2

Eval = 3

Whether to emit warnings when detecting uses of direct evals.

See Avoiding Direct eval in Troubleshooting page for more details.

IllegalIdentifierAsNameError = 4

InvalidExportOptionError = 5

InvalidOptionError = 6

MissingExportError = 7

MissingGlobalName = 8

Whether to emit warnings when the output.globals option is missing when needed.

See output.globals.

MissingNameOptionForIifeExport = 9

Whether to emit warnings when the output.name option is missing when needed.

See output.name.

InvalidAnnotation = 10

Whether to emit warnings when a #__PURE__ / @__PURE__ annotation has no effect due to its position.

Annotations placed where they cannot annotate a call expression (e.g. before a non-call expression, before a statement declaration, or between an identifier and = in a variable declarator) are ignored by the parser. Matches Rollup’s INVALID_ANNOTATION log code.

By default, warnings are emitted only for local project files inside cwd and outside node_modules. Set this option to false to disable the warning entirely.

MixedExports = 11

Whether to emit warnings when the way to export values is ambiguous.

See output.exports.

ParseError = 12

UnresolvedEntry = 13

Whether to emit warnings when an entrypoint cannot be resolved.

UnresolvedImport = 14

Whether to emit warnings when an import cannot be resolved.

FilenameConflict = 15

Whether to emit warnings when files generated have the same name with different contents.

{@include ../docs/checks-filename-conflict.md}

FilenameOutsideOutputDirectoryError = 16

FileNotFoundError = 17

AssignToImportError = 18

CommonJsVariableInEsm = 19

Whether to emit warnings when a CommonJS variable is used in an ES module.

CommonJS variables like module and exports are treated as global variables in ES modules and may not work as expected.

{@include ../docs/checks-commonjs-variable-in-esm.md}

ImportIsUndefined = 20

Whether to emit warnings when an imported variable is not exported.

If the code is importing a variable that is not exported by the imported module, the value will always be undefined. This might be a mistake in the code.

{@include ../docs/checks-import-is-undefined.md}

UnsupportedFeatureError = 21

EmptyImportMeta = 22

Whether to emit warnings when import.meta is not supported with the output format and is replaced with an empty object ({}).

See import.meta in Non-ESM Output Formats page for more details.

JsonParseError = 23

IllegalReassignmentError = 24

InvalidDefineConfigError = 25

ResolveError = 26

UnhandleableError = 27

UnloadableDependencyError = 28

TransformError = 29

ToleratedTransform = 30

NapiError = 31

CannotCallNamespace = 32

Whether to emit warnings when a namespace is called as a function.

A module namespace object is an object and not a function. Calling it as a function will cause a runtime error.

{@include ../docs/checks-cannot-call-namespace.md}

ConfigurationFieldConflict = 33

Whether to emit warnings when a config value is overridden by another config value with a higher priority.

{@include ../docs/checks-configuration-field-conflict.md}

PreferBuiltinFeature = 34

Whether to emit warnings when a plugin that is covered by a built-in feature is used.

Using built-in features is generally more performant than using plugins.

BundlerInitializeError = 35

PluginError = 36

AlreadyClosedError = 37

CouldNotCleanDirectory = 38

Whether to emit warnings when Rolldown could not clean the output directory.

See output.cleanDir.

PluginTimings = 39

Whether to emit warnings when plugins take significant time during the build process.

{@include ../docs/checks-plugin-timings.md}

DuplicateShebang = 40

Whether to emit warnings when both the code and postBanner contain shebang

Having multiple shebangs in a file is a syntax error.

TsConfigError = 41

UnsupportedTsconfigOption = 42

Whether to emit warnings when a tsconfig option or combination of options is not supported.

RuntimeModuleSymbolNotFoundError = 43

IneffectiveDynamicImport = 45

Whether to emit warnings when a module is dynamically imported but also statically imported, making the dynamic import ineffective for code splitting.

RequireTlaError = 46

LargeBarrelModules = 47

Whether to emit info logs when a barrel module has a very large number of re-exports (more than 5000).

Such modules can significantly slow down module resolution. Consider using @rolldown/plugin-transform-imports to rewrite barrel imports at the source level so the barrel file is never loaded.

See Large barrel modules for more details.

SourcemapBroken = 48

Whether to emit warnings when a plugin transforms code without generating a sourcemap.

Trait Implementations

impl Clone for EventKind

fn clone(&self) -> EventKind

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for EventKind

impl Debug for EventKind

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for EventKind

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.