Target has no effect on hydration

[edgylord]

Using:
map-transform@1.5.4

const source = {
	data: [
		{
			content: {
				name: 'An interesting piece',
				meta: {
					author: 'fredj',
					date: 1533750490952
				}
			}
		}
	]
}

const def = [
	'data[0].content',
	{
		title: 'name',
		author: 'meta.author',
	},
]

//docs: provide MapTransform with a target that the transformation will be applied to
const target = { id: '12345', title: 'Default title' }
const result = await mapTransform(def)(source, { target })

//expect:
//{
//  id: '12345',
//  title: 'An interesting piece',
//  author: 'fredj',
//}

//returns (=> no id field):
//{
//  title: 'An interesting piece',
//  author: 'fredj',
//}

[kjellmorten]

Thanks for submitting an issue, @edgylord, and sorry for not getting back to you sooner.

But I am a bit unsure of what you're getting at here. How does "hydration" play into this?

[edgylord]

@kjellmorten As I understand it: a transformed object will be merged into a target object finally. But as i see all the target objects original properties are removed in the process. Based on my reading of the documentation, these properties are supposed to be preserved. So, my question is: Will all the original properties of the target object be removed in the final result (is this the intended behaviour), or should the target object fields (that not interesect with the fields of the transformed object) meant to remain in the final result?