javascript - How does vue configure the event types it listens to?

Question

Vue.component('button-counter', {
  template: '<button v-on:click="increment()">{{ counter }}</button>',
  data: function () {
    return {
      counter: 0
    }
  },
  methods: {
    increment: function () {
      this.counter += 1
    }
  },
})

For example, in the above component, I hope that the event v-on listens to is passed by the parent component, instead of writing it as click here. How should I write it?

Of course I know how to use props to pass, I want to know how to write v-on later. If you write propname directly, Vue will think that the event to be monitored is propname, not the specific event.

Answer 1

The questioner has special needs. If so, you may have to use render instead of template:

<p id="app">
  <button-counter :event="'click'">abc</button-counter>
</p>

const counter = Vue.component('button-counter', {
  render(createElement) {
    return createElement(
      'button', {
        on: {
          [this.event]: this.increment,
        },
      },
      `${this.counter}`,
    )
  },
  data() {
    return {
      counter: 0,
    }
  },
  props: {
    event: String
  },
  methods: {
    increment() {
      this.counter += 1
    },
  },
})

new Vue({
  el: '#app',
  components: {
    'button-counter': counter,
  },
})

Answer 2

Parent components pass parameters to subcomponents through props. Props can be functions, so you can pass a function to subcomponents