[Ext JS 4] browser compatibility

Preface it is reasonable to say that Ext js development should not be compatible with browsers, because Ext js itself considers the compatibility of various browsers. This article is not so much about the compatibility of Ext js development as about the compatibility of web development. Internet explorer cannot open the internet site operation aborted this error is reported in IE 7 and earlier versions. (Chinese error: "Internet Explorer cannot open internet site, operation terminated") the page cannot be opened. However, chrome and firefox are already normal in IE 8 (and later versions. There are basically two reasons: 1. the page tag does not match. For example, <div> has a start tag, but the end tag of </div> is missing. 2. append child elements to the page elements before the page load is complete. A typical example of Ext js is not to create components in Ext. onReady.

Expected identifier, String or number [javascript] view plaincopyExt. create ('ext. window. window ', {title: 'test Window', height: 580, width: 600, layout: 'fit', html: 'This is Test Window! ',}). Show ();

 

The preceding section is abnormal in IE and abnormal. Delete the comma (,) at the end of the html configuration item. It seems that IE and syntax are more rigorous. During console development, you always like to use console. log () to print some information on the console, but this object is not found in IE browsers. Therefore, before using the console, you need to make a non-empty judgment if (typeof (console )! = "Undefined" & console! = Null)