保留一份支持的浏览器列表(及其版本号)。
Keep a list of the browsers (and their version Numbers) you support.
您可以想象一下处理所有支持的浏览器的代码大拼盘。
You can imagine the spaghetti code when dealing with all of the browsers it must support.
这种技术最不推崇，提供支持的浏览器也少。
This technique is the least favorable and has the least browser support.
应用推荐