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feat(minifier): add compress.treeshake.invalidImportSideEffects #728

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feat(minifier): add compress.treeshake.invalidImportSideEffects #728

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17 changes: 17 additions & 0 deletions src/docs/guide/usage/minifier/dead-code-elimination.md
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Expand Up @@ -255,3 +255,20 @@ const jQuery = $;

// output (with `compress.treeshake.propertyReadSideEffects: false`)
```

### Ignoring Invalid Import Statement Side Effects

By default, Oxc minifier assumes that import statements have side effects. This is because import statements have side effects in the following cases:

- the import cannot be resolved
- the import name is not exported from the imported module

You can tell Oxc minifier to ignore those possibilities by setting `compress.treeshake.invalidImportSideEffects` option to `false`.

```js
// input
import { existing } from "cannot-be-resolved";
import { missing } from "somewhere";

// output (with `compress.treeshake.invalidImportSideEffects: false`)
```