Vue在调用组件base-input的时候，无法读出label的值，这是为什么呢？

Question

  <div id="app">
    <base-input v-model="username" required placeholder="Enter your username"></base-input>
  </div>
  <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>

  <script>
    Vue.component('base-input', {
      inheritAttrs: false,
      props: ['label', 'value'],
      template: `
    <label>
      {{ label }}
      <input
        v-bind="$attrs"
        v-bind:value="value"
        v-on:input="$emit('input', $event.target.value)"
      >
    </label>
  `
    });

    new Vue({
      el: "#app",
      data: {
        label: '用户',
        value: '',
        username: ''
      }
    })

  </script>

Answer 1

    <base-input v-model="username" :label="label" required placeholder="Enter your username"></base-input>