shimMissingExports

• 类型：boolean

  ¥Type: boolean

• 默认值：false

  ¥Default: false

当 true 设置为 true 时，会为缺失的导出创建填充变量，而不是抛出错误。

¥When true, creates shim variables for missing exports instead of throwing an error.

示例

¥Examples

启用 shimming

¥Enable shimming

export default {
  shimMissingExports: true,
};

示例场景

¥Example scenario

module-a.js：

export { nonExistent } from './module-b.js';

module-b.js：

// nonExistent is not actually exported here
export const something = 'value';

使用 shimMissingExports: false（默认）时，这会引发错误。使用 shimMissingExports: true，Rolldown 将创建一个填充变量：

¥With shimMissingExports: false (default), this would throw an error. With shimMissingExports: true, Rolldown will create a shim variable:

// Bundled output (simplified)
const nonExistent = undefined;
export { nonExistent, something };