Interface TypeScriptOptions

When enabled, type-only class fields are only removed if they are prefixed with the declare modifier:

Also generate a .d.ts declaration file for TypeScript files.

The source file must be compliant with all isolatedDeclarations requirements.

When enabled, class fields without initializers are removed.

For example:

class Foo {
   x: number;
   y: number = 0;
}
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// transform into

class Foo {
   x: number;
}
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The option is used to align with the behavior of TypeScript's useDefineForClassFields: false option. When you want to enable this, you also need to set [crate::CompilerAssumptions::set_public_class_fields] to true. The set_public_class_fields: true + remove_class_fields_without_initializer: true is equivalent to useDefineForClassFields: false in TypeScript.

When set_public_class_fields is true and class-properties plugin is enabled, the above example transforms into:

class Foo {
  constructor() {
    this.y = 0;
  }
}
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Defaults to false.

Rewrite or remove TypeScript import/export declaration extensions.

• When set to rewrite, it will change .ts, .mts, .cts extensions to .js, .mjs, .cjs respectively.
• When set to remove, it will remove .ts/.mts/.cts/.tsx extension entirely.
• When set to true, it's equivalent to rewrite.
• When set to false or omitted, no changes will be made to the extensions.