What does the model option in a component do?

Question

Vue.js

model: {
    prop: 'checked',
    event: 'change'
  },
  props: {
    checked: Boolean,
    value: String
  }

I didn’t find a description about model, and such a props entry is not at all clear what it does.
Sidebar from:
https://ru.vuejs.org/v2/guide/components.html#%D0%...

Answer 1

This props entry allows you to determine in advance which props the component will accept, and what data types are expected in those props.