function beforeSequenceClose(code) {
      if (code === marker) {
        effects.enter(types.codeFencedFenceSequence)
        return sequenceClose(code)
      }

      return nok(code)
    }
In closing fence, after optional whitespace, at sequence.

```markdown
  | ~~~js
  | alert(1)
> | ~~~
    ^
```

@type {State}