[improvement] rename packages dir to src (#3659)

src/sidebar/demo/index.vue

@@ -0,0 +1,68 @@
+<template>
+  <demo-section>
+    <demo-block :title="$t('basicUsage')">
+      <van-sidebar
+        :active-key="activeKey"
+        @change="onChange"
+      >
+        <van-sidebar-item :title="$t('title')" />
+        <van-sidebar-item
+          :title="$t('title')"
+          info="8"
+        />
+        <van-sidebar-item
+          :title="$t('title')"
+          info="99"
+        />
+        <van-sidebar-item
+          :title="$t('title')"
+          info="99+"
+        />
+      </van-sidebar>
+    </demo-block>
+  </demo-section>
+</template>
+
+<script>
+export default {
+  i18n: {
+    'zh-CN': {
+      title: '标签名称'
+    }
+  },
+
+  data() {
+    return {
+      activeKey: 0
+    };
+  },
+
+  methods: {
+    onChange(key) {
+      this.activeKey = key;
+    }
+  }
+};
+</script>
+
+<style lang="less">
+@import '../../style/var';
+
+.demo-sidebar {
+  .van-sidebar {
+    width: auto;
+    margin: 0 15px;
+    padding: 20px 0;
+    background-color: @white;
+
+    &::after {
+      display: none;
+    }
+  }
+
+  .van-sidebar-item {
+    width: 85px;
+    margin: 0 auto;
+  }
+}
+</style>