no mutation error

[ha404]

Should this error on mutation?

  const formattedQuery = {
    ...query,
  }

  delete formattedQuery['access-token']

[ljharb]

Yes. delete should be entirely forbidden.

You probably want const { 'access-token': unused, ...formattedQuery } = query; instead.

[ha404]

Thanks! I don't see an error thrown for using delete what am I missing in the config?

[ljharb]

It probably just doesn't check for it yet, but it should.

[AlanFoster]

I believe it should be possible to write a simple rule for this, by adding a visitor for the UnaryExpression node, and checking that the node.operator === 'delete'