message: chore(cli): demo-block add demoName class
diff: <template>
  - <div class="van-doc-demo-block">
  + <div class="van-doc-demo-block" :class="demoName">
  <h2 v-if="title" class="van-doc-demo-block__title">{{ title }}</h2>
  <div v-if="card" class="van-doc-demo-block__card">
  <slot />
  </template>
  <script>
  +import { decamelize } from '../../common';
  +
  export default {
  name: 'demo-block',
  @@ -16,6 +18,17 @@ export default {
  card: Boolean,
  title: String,
  },
  +
  + computed: {
  + demoName() {
  + const { meta } = this.$route || {};
  + if (meta && meta.name) {
  + return `demo-${decamelize(meta.name)}`;
  + }
  +
  + return '';
  + },
  + },
  };
  </script>
  