uniapp 微信小程序使用button调用在线客服聊天功能

<button open-type="contact" style="border-radius: 0;display: flex;flex-direction: column;align-items: center;justify-content: center;">
    <image src="../../static/retail_server.png" mode="widthFix" style="height:46rpx;width: 42rpx ;margin-bottom:10rpx;"></image>
    <text>客服</text>
</button>