我想实现预替换或替换网页源码里的某些内容，比如不良词语，链接什么的，图片什么的。
在加载网页呈现之前就进行替换，替换之后再显示给用户，而不是加载后再进行替换，请问有没有相关API可以实现，或有没有类似功能的扩展呢?
回复内容：
我想实现预替换或替换网页源码里的某些内容，比如不良词语，链接什么的，图片什么的。
在加载网页呈现之前就进行替换，替换之后再显示给用户，而不是加载后再进行替换，请问有没有相关API可以实现，或有没有类似功能的扩展呢?
这个你可以通过开发chrome插件
插件可以监听页面内容的加载过程，并且在DOM加载完成后就执行JS脚本，替换其中的内容就好
曾经开发过类似的插件，就页面上每个可点击位置的流量数据显示在页面上
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