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Home > Backend Development > PHP Tutorial > javascript - 不刷新页面就可以更新数据是怎么弄的？

javascript - 不刷新页面就可以更新数据是怎么弄的？

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Release： 2016-06-06 20:15:21
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例如一个订单提醒，我不刷新页面订单的数量会自动变化

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例如一个订单提醒，我不刷新页面订单的数量会自动变化

1 ajax http轮询
2 long-polling
3 websocket长连接
4 基于flash socket实现

以上是4种方法。 还有其他。
推荐2和3. 简单场景，并发不大也可以用1. 1实现最简单。

Ajax异步请求

setInterval + Ajax

1.js 做一个定时器
2.5分钟请求一次ajax
3.回调的值进行数量赋值

AJAX/WEBSOCKET

fetch轮询

Related labels：
javascript php
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