how to set props valye in vue code example

Example 1: vuejs does props factory function have access to vue instance

Vue.component('foo', {
  template: '<div>{{ num }}</div>',
  props: {
    func: {
      type: Number,
      default: () => this.a,
    },
  },
  data() {
    return { 
      num: this.func(),
      a: -22
    }
  }
})

new Vue({
  el: '#app',
});

Example 2: vue passing props

<!-- Dynamically assign the value of a variable -->
<blog-post v-bind:title="post.title"></blog-post>

<!-- Dynamically assign the value of a complex expression -->
<blog-post
  v-bind:title="post.title + ' by ' + post.author.name"
></blog-post>

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