Why is the length of the slot 0?

[Lazydd]

Vue version

3.4.15

Link to minimal reproduction

https://play.vuejs.org/#eNq1VF9P2zAQ/yonb1I3DVIK2ktUKm0TD5smhjbeCA9Zc2kNjhPFTgeq+t1358SpW0opD+Qlvt/99fl3txRfqipaNChiMTbTWlYWDNqmmiRaFlVZW7iuESGvywIG0ZAFNh8kelpqYyFLbQrncLNMNICVVmEMgyqtUVsYDY4YvcdHwk6OT1pxOpcqI30MNywCOFf+tt29B399kBB8EsqF6+MoTPPBUehKzrDq3YPUYfrWLdSEEbpL+W9nCS+XsV3IAR6jbY/bQFprPOqR57sb3GSdKQCDqy1DC36BPpoxhuo6POnprqQB+EzS0xeTsrS6TfR42NKYCEyCxaJSqUWSAMaOyjFT9jwR/EuEU5DKG8I7ScQm9RIU6pmdw4qMxqZK9cSo0kYter5c61eUktXj4WY2Nyx03MDFkbCGMuRyFt2ZUtPcuWYlYloWlVRY/6qspNFKROzbmIhUqfLfD4fZusHu4uQzx+n9DvzOPDCWiKsaDdYLTESvs2k9Q9uqL/5c4gOde2VRZo0i6z3K32hK1XCNrdnXRmdUdmDnqv3utofUs2tz8WBRG38pLpQt22dLBG2Tb3uuvi73LDpzfvTO1EW/ibYXF6hUz+j9LIXZXGKXZba5yBjollmGudR4VZeVGbvUzI4YUv14Q5xaTT583M+sTC48k/pUi+O8rLkSZp3ULmQiev4xzCKRvJMiOjKicIGKsFFPz10E5V9gQCbMT9Bpgb0W4vVxuI61SVRPVS66Y257nW3ihj1767Y7crhGxKCb4i8R7LBnAGMfFXegIOJI/RNzG38+qWge/GXnowlNL2eK3EJxE0xgp3az3LfqmZ766Y/hPVuYiHXdbuCN0Xe72w3bW2ZxLPNuB0V+5YWvvZdEgccr2OT+8AlCVh3Eq1cwawe3nrDric1uuq3+A9r3obo=

Steps to reproduce

run

What is expected?

slot.length=1

What is actually happening?

slot.length=0

System Info

No response

Any additional comments?

No response

[LinusBorg]

Because $slots.icon is a function. Slots are ways functions in Vue 3

[Lazydd]

how do I get the length of the slot