How do you customize model directive for a component?

The v-model directive on a component uses value as the prop and input as the event, but some input types such as checkboxes and radio buttons may need to use the value attribute for a server side value. In this case, it is preferred to customize model directive.

Let's take an example of checkbox component,

Vue.component('custom-checkbox', {
model: {
prop: 'checked',
event: 'change'
},
props: {
checked: Boolean
},
template: `
<input
type="checkbox"
v-bind:checked="checked"
v-on:change="$emit('change', $event.target.checked)"
>
`
})

Now you can use v-model on this customized component as below,

<custom-checkbox v-model="selectFramework"></custom-checkbox>

The selectFramework property will be passed to the checked prop and same property will be updated when custom checkbox component emits a change event with a new value.