Configuration required to get Sencha ExtJS TreeGrid example working

Question

Can someone help explain what configuration I\'m missing to get the Sencha Ext JS 4 framework TreeGrid sample working?

Here\'s what I\'ve done so far:

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Answer 1

Apart from the other configuration described, I had to go into IIS and do the following before the Tree Grid worked:

• click on the new site
  
• click on MIME types
  
• right click in open space > Add > File name extension: "json" ... MIME Type: "application/x-javascript"