function chunkStart(code) {
    assert(
      code !== codes.eof && !markdownLineEnding(code),
      'expected no eof or eol'
    )

    effects.enter(types.content)
    previous = effects.enter(types.chunkContent, {
      contentType: constants.contentTypeContent
    })
    return chunkInside(code)
  }
Before a content chunk.

```markdown
> | abc
    ^
```

@type {State}