1.jQuery概述 jQuery是一个JavaScript库,它集成了JavaScript.DOM.CSS和Ajax,简化了JavaScript编程,提倡write less, do more. 2.jQuery与JavaScript的区别 jQuery加载比JavaScript快,jQuery在DOM绘制完毕加载,JavaScript会在页面所有元素加载完毕才开始加载 jQuery不存在覆盖问题,多个函数恢依次执行:JavaScript存在覆盖问题,前面的函数会被覆盖掉,只能执行最后一个 3…
页面加载readyState的五种状态 原文如下: 0: (Uninitialized) the send( ) method has not yet been invoked. 1: (Loading) the send( ) method has been invoked, request in progress. 2: (Loaded) the send( ) method has completed, entire response received. 3: (Interactive)…