本文讨论了在Web开发中使用$(document).ready()与onload事件处理程序的区别。前者通常更受欢迎，但在某些情况下可能需要后者来确保所有资源都已加载完成，例如获取图片的真实尺寸。
Using $(document).ready() is almost always preferable to using an
onload handler, but we need to keep in mind that because supporting
files may not have loaded, attributes such as image height and width are
not necessarily available at this time. If these are needed, we may at times also choose to implement an onload handler (or more likely, jQuery's .load() equivalent); the two mechanisms can coexist peacefully.
onload handler, but we need to keep in mind that because supporting
files may not have loaded, attributes such as image height and width are
not necessarily available at this time. If these are needed, we may at times also choose to implement an onload handler (or more likely, jQuery's .load() equivalent); the two mechanisms can coexist peacefully.
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