摘要：
本文转载，需看原文，请走这里:(E文不好 各位还是直接看代码吧)变量声明The var declaration allows you to chain definitions in a comma separated list; what’s more that list can reference variables declared earlier in the same list.Take this code as an example:var el = document.getElementById(“my-element”);var elWidth = el.offsetWidth; 阅读全文