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38. JS sdk 涉及点 #38

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ly525 opened this issue Aug 11, 2017 · 0 comments
Open

38. JS sdk 涉及点 #38

ly525 opened this issue Aug 11, 2017 · 0 comments
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4.1 技术落地<正则表达式>

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@ly525
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ly525 commented Aug 11, 2017 •
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  1. 通过JS动态引入的方式加载的CSS文件总是异步的，所以不会阻塞其他文件的风险
  2. 重复加载问题: 提供给publisher的代码，不必再引入多个脚本引入多个脚本来渲染组件。但是很多时候大家都用复制粘贴来解决问题时，publisher还是会这么干，因此脚本有可能会重复执行。如果不希望二次执行，可以在脚本执行时创建一个标识符，比如window[xxxx] = 1从而让代码在二次执行的时候提前退出。判断页面上广告位数量>0的时候才去加载数据。
  3. 使用throttle 解决滚动时候页面抖动问题
  4. 判断元素是否出现在滚动区域
  5. 如果元素出现在滚动区域，判断图片是否有lazy_src属性，使用图片懒加载。

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  1. trim => return str.replace(/^[\s\xa0]+|[\s\xa0]+$/g, "")
@ly525 ly525 added CSS and removed CSS labels Jul 12, 2018
@ly525 ly525 added this to 鲁班H5 中的应用 in 4.1 技术落地<正则表达式> May 5, 2020
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