SOURCE

<div id="app">
    <div class="block">
    <div class="radio">
        排序：
        <el-radio-group v-model="reverse">
        <el-radio :label="true">倒序</el-radio>
        <el-radio :label="false">正序</el-radio>
        </el-radio-group>
    </div>

    <el-timeline :reverse="reverse">
        <el-timeline-item
        v-for="(activity, index) in activities"
        :key="index"
        :timestamp="activity.timestamp">
        {{activity.content}}
        </el-timeline-item>
    </el-timeline>
    </div>

</div>