javascript getAttribute
浏览数：26 /
时间：2015年06月08日
var nodes = document.getElementsByTagName("script"); var node = nodes[nodes.length - 1]; var src = document.querySelector ? node.src : node.getAttribute("src", 4);
以前一直以为 node.getAttribute("src", 4) 是笔误，后面在MSDN中找到了对应IE中的API[1]，
才明白这种写法是兼容IE的写法。
getAttribute method Retrieves the value of the specified attribute. Document Object Model (DOM) Level 2 HTML Specification, Section 1.6.5 Syntax object.getAttribute(strAttributeName, lFlags) Parameters strAttributeName [in] Type: String String that specifies the name of the attribute. lFlags [in, optional] Type: Integer Integer that specifies one or more of the following flags: 0 Default. Performs a property search that is not case-sensitive, and returns an interpolated value if the property is found. 1 Performs a case-sensitive property search. To find a match, the uppercase and lowercase letters in strAttributeName must exactly match those in the attribute name. 2 Returns attribute value as a String. This flag does not work for event properties. 4 Returns attribute value as a fully expanded URL. Only works for URL attributes. Return value Type: Variant Variant that returns a String, Variant of type Integer, or Boolean value as defined by the attribute. If the attribute is not present, this method returns null.
[1] http://msdn.microsoft.com/en-us/library/ie/ms536429(v=vs.85).aspx
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