将vue函数数据传递到模式

<template>
  <div>
    <child-component :data="myData"></child-component>
  </div>
</template>

<script>
import ChildComponent from './ChildComponent.vue';

export default {
  components: {
    ChildComponent
  },
  data() {
    return {
      myData: 'Hello World'
    };
  }
};
</script>

<template>
  <div>
    <p>{{ data }}</p>
  </div>
</template>

<script>
export default {
  props: ['data']
};
</script>

<template>
  <div>
    <child-component @custom-event="handleEvent"></child-component>
  </div>
</template>

<script>
import ChildComponent from './ChildComponent.vue';

export default {
  components: {
    ChildComponent
  },
  methods: {
    handleEvent(data) {
      console.log(data);
    }
  }
};
</script>

<template>
  <div>
    <button @click="emitEvent">Click Me</button>
  </div>
</template>

<script>
export default {
  methods: {
    emitEvent() {
      this.$emit('custom-event', 'Hello World');
    }
  }
};
</script>

import Vue from 'vue';
import Vuex from 'vuex';

Vue.use(Vuex);

export default new Vuex.Store({
  state: {
    myData: 'Hello World'
  },
  mutations: {
    updateData(state, newData) {
      state.myData = newData;
    }
  }
});

<template>
  <div>
    <p>{{ myData }}</p>
    <button @click="updateData">Update Data</button>
  </div>
</template>

<script>
import { mapState, mapMutations } from 'vuex';

export default {
  computed: {
    ...mapState(['myData'])
  },
  methods: {
    ...mapMutations(['updateData'])
  }
};
</script>

<template>
  <div>
    <button @click="updateData">Update Data</button>
  </div>
</template>

<script>
import { mapMutations } from 'vuex';

export default {
  methods: {
    ...mapMutations(['updateData'])
  }
};
</script>