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Product Version = NetBeans IDE 8.0.2 (Build 201411181905) Operating System = Windows 7 version 6.1 running on amd64 Java; VM; Vendor = 1.7.0_51 Runtime = Java HotSpot(TM) 64-Bit Server VM 24.51-b03 when you write <input type="number" name="tel" pattern="[0-9]{10,11}"/> an error occured, the pattern attribute is not recognized
This was fixed in current dev build, by updating html validator. http://hg.netbeans.org/web-main/rev/26573d86f877