如何使用角度js限制文本框中的特殊字符严重重音（反引号）

i wants to validate text box which allows special character like []^_,atoz,1 to 10 characters.am using ng-pattern="/^[a-zA-Z0-9]*$/" it allows to enter but it doesnot enable submit button.But the problem is we should not allow user to enter special characters especially Grave accent (`):i wants to validate text box which allows speci