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javascript - 用ajax换一个屏幕的数据

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Jun 06, 2016 pm 08:37 PM

ajaxjavascriptphpseoFront-end development

为了达到更好的用户体验，使用ajax来做数据的切换。假设，一页显示100个产品，产品有图片，有标题以及其他属性。用户点击一些条件，ajax重新加载一页数据。如何操作dom，让加载的过程看起来更柔和？这个词不知道用的对不对，最简单粗暴的就是，数据dom全清掉，通过ajax获取的json重新组织dom替换过去。更好的做法是怎样呢？

这个问题，大家的回答，已经很收益了。我在加大些范围，如何在用户体验与SEO之间平衡呢？我需要搜索引擎收录我的数据，但是这种AJAX的方式，搜索引擎又不认识?

回复内容：

先说明点，清除dom和页面加载自然没有必然联系，不能说我操作了dom，我页面加载就不友好了。页面的友好性是通过交互实现。当然了，频繁大量的操作dom会带来性能问题，会延长页面的加载时间。

先说明下实现

要是我来做的话，会使用模板引擎如handlebars，拿到数据后渲染成html插入到dom中。如果使用了MVVM框架，只需要改变下model就可以了，但是大部分的框架还是如题主所说的粗暴方式处理的，angularjs除外。所以楼主不要纠结了，就得简单粗暴的干，关键是怎么粗暴的干，让人感觉不出来。

再说下效果

首先，在不同页切换时，加个loading的效果。
其次，使用模板引擎管理你的html
如果所有的产品不是一次性展示在页面上，使用图片懒加载
请求过的数据要缓存下来，避免再次请求

SEO

如果要做SEO的话，这种方式是不可行的，因为你的数据都是通过js去渲染的，搜索引擎爬取你的链接时，页面内容都是空的，那怎么收录你的产品链接？
刚咨询了我们的SEO工程师，国内搜索引擎还是以百度为主的，暂时还没办法执行js。为了SEO还是采用后端渲染的方式吧。
除非你们产品有这么吊,那就像它这样
javascript - 用ajax换一个屏幕的数据

你提的这个问题是不是想问通过什么样的交互才能感觉起来更好？其实这个关键靠你自己的想象了
可以这样，点击执行ajax的时候，把要替换的dom先用渐隐效果隐藏掉，然后弹出一个loading的提示，成功获取数据后，替换数据，然后loadding消失，dom显示
获取数据有时候会很快，所以，在替换完数据后，延迟一下再进行交互，大约300ms就够了

"柔和"主要靠的是交互细节，比如加载过程中的视觉反馈（进度条／菊花），加载过程中的交互（正在加载的时候做了其他操作怎么办？是mask蒙住，是中止之前的加载，还是操作无效并有视觉反馈“加载中请勿操作”？），以及加载时间过长时的反馈（类似gmail“加载比预期慢，是否切换到普通html版本” “仍在进行/重试”）等等

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