問(wèn)題種種做底層接口兼容,無(wú)非就是利用if,判斷客戶端支持哪個(gè)接口的問(wèn)題。最著名的例子就是事件: 復(fù)制代碼代碼如下: var addEvent = function(e, what, how) { if (e.addEventListener) e.addEventListener(what, how, false) else if (e.attachEvent) e.attachEvent('on' + what, how) ...
www.dbjr.com.cn/article/245...htm 2025-5-19