IE6内存泄漏的解决办法（一）

最新推荐文章于 2024-11-13 21:53:29 发布

原创最新推荐文章于 2024-11-13 21:53:29 发布 · 657 阅读

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文章标签：

#ie #attributes #string #null #function #leak

本文介绍了一个用于解决Internet Explorer中由于JS创建DOM对象时产生的循环引用而导致的内存泄漏问题的方法。通过一个具体的函数实现示例，展示了如何正确地管理DOM元素以避免内存泄漏，并确保在函数结束时将创建的元素引用设为空。

IE下内存泄漏的官方说明http://msdn.microsoft.com/en-us/library/bb250448(VS.85).aspx

1. 对于使用JS创建DOM对象时产生的循环引用导致的内存泄漏问题

可以参考文章《Finally, the alternative fix for IE6's memory leak is available》

makeDOM : function (tagname, attributes, children) { try{ // If we were invoked with two arguments, the attributes argument is // an array or string; it should really be the children arguments. if (arguments.length == 2 && (attributes instanceof Array || typeof attributes == "string")) { children = attributes; attributes = null; } // Create the element var e = document.createElement(tagname); // Set attributes if (attributes) { for(var name in attributes) e[name]= attributes[name]; } // Add children, if any were specified. if (children != null) { if (children instanceof Array) { // If it really is an array for(var i = 0; i < children.length; i++) { // Loop through kids var child = children[i]; if (typeof child == "string") // Handle text nodes child = document.createTextNode(child); e.appendChild(child); // Assume anything else is a Node } } else if (typeof children == "string") // Handle single text child e.appendChild(document.createTextNode(children)); else e.appendChild(children); // Handle any other single child } // Finally, return the element. return e; }catch(err){ throw "Error happens when make DOM: " + "tag:" + tagname + " attr:" + attributes.toAttrString(); }finally{ e = null; } },//end makeDOM : function (tagname, attributes, children) {

其中需要注意的语句是

finally{ e = null; }

finally语句将会在return后，将e置为null