FlowLoader
The FlowLoader removes Flow type annotations from JavaScript files, ensuring they can be processed by loaders that do not support Flow syntax. It should be positioned before other loaders (e.g. builtin:swc-loader) to prevent parsing errors when encountering Flow-specific code.
Details
This loader uses flow-remove-types under the hood. You can learn more about it here.
Options
all
- Type:
boolean - Default:
false
If true, bypasses looking for an @flow pragma comment before parsing.
ignoreUninitializedFields
- Type:
boolean - Default:
false
If true, removes uninitialized class fields (foo;, foo: string;) completely rather than only removing the type.
pretty
- Type:
boolean - Default:
false
If true, removes types completely rather than replacing with spaces. This may require using source maps.
removeEmptyImports
- Type:
boolean - Default:
true
If true, removes empty import statements (import {} from 'flow-typed-module';) which were only used for importing flow types.
Example
flow-loader is automatically applied thanks to getJsTransformRules helper that is included by default in Re.Pack v5 configuration and its preset for most common libraries.


