angularjs - Missing step attribute error message in input -

angular js provide validation several html5 introduced attributes of input, min or requiredincluding .

<input type="number" name="input1" id="input1" min="0"          ng-model="$ctrl.input1"ng-required /> <div ng-messages="formname.input1.$error" class="em-messages">     <div ng-message="required">this value required</div>     <div ng-message="min">you must not use negative values</div> </div> 

for step attribute such validation working, no error message can displayed material way default, what's easiest way implement (for example step="0.001"?

<input type="number" name="input1" id="input1" min="0" step="0.001"         ng-model="$ctrl.input1"ng-required /> <div ng-messages="formname.input1.$error" class="em-messages">     <div ng-message="required">this value required</div>     <div ng-message="min">you must not use negative values</div>     <div ng-message="step">you can work 0.001 steps</div> </div> 

simple, use regex this:

<input type="number" name="input1" id="input1" min="0" step="any"         ng-model="$ctrl.input1"ng-required           ng-pattern="/^[0-9]\d*((.|,)\d{1,3})?$/" /> <div ng-messages="formname.input1.$error" class="em-messages">     <div ng-message="required">this value required</div>     <div ng-message="min">you must not use negative values</div>     <div ng-message="pattern">you can work 0.001 steps</div> </div> 

to eplain regex quickly:
[1-9]\d* means there can natural numbers
((.|,)\d{1,3})? . or , can follow seperate fraction
\d{1,3} defines there have 1 3 numbers have follow

now pattern show error message in angular material style.

depending on how step should like, have modify either \d{1,3}, reflect amount past commata numbers , maybe wrap modulo, if want todo link step="0.005".