window.open（）在Android上从setTimeout调用时返回undefined
[英]window.open() returns undefined when called from setTimeout on Android
问题描述
I am having strange behaviour on my Android emulator. 
我的Android模拟器上有奇怪的行为。 window.open() always returns undefined when called from setTimeout or callback function eg AJAX callback. 当从setTimeout或回调函数调用时，window.open（）总是返回undefined，例如AJAX回调。 However window.open() successfully opens a popup when called from an event handler eg onclick here is sample code: 但是，当从事件处理程序调用时，window.open（）会成功打开一个弹出窗口，例如onclick这里是示例代码：
<html> <head> </head> <body> <script type="text/javascript"> function fnc() { setTimeout(function() { alert(window.open('about:blank')) }, 100); } </script> <input type="button" onclick="fnc()" value="push me"> </body> </html>
In the example alert(window.open('about:blank')) shows 'undefined' and the popup is not created The same function works when called straight from fnc() 在示例警报（window.open（'about：blank'））中显示'undefined'并且未创建弹出窗口从fnc（）直接调用时，同样的函数有效
Any ideas? 有任何想法吗？
Thanks 谢谢
1 个解决方案
解决方案1
3 2010-09-19 11:47:38
Try the following: 请尝试以下方法：
<html> <head> <script type="text/javascript"> function go(){ window.open('about:blank'); } function fnc() { var buttonnode= document.createElement('input'); buttonnode.setAttribute('type','button'); buttonnode.setAttribute('name','sal'); buttonnode.setAttribute('style','display:none;'); document.body.appendChild(buttonnode); buttonnode.onclick = go; setTimeout(function() { buttonnode.click() }, 100); } </script> </head> <body> <input type="button" onclick="fnc()" value="do later"><br/> </body> </html>
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