html - AngularJS validation input diffrent than zero -

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starting i'm realy new in progrraming especialy angular. want validate input not allow number 0 . here code:

<form ng-app="linearequation" ng-controller="calcctrl"                name="calculator" ng-init="notvalid=true" novalidate>         <div>             <h3 class="field">kalkulator oblicza wartość równania                  <var>ax = b</var>.</h3>             <div class="field">                 <p>                     podaj wartość a:<br/>                     <input type="number" name="fielda" ng-model="a" required integer />                     <span class="error" ng-show="calculator.fielda.$invalid"/>                     <span  ng-show="calculator.fielda.$error.number">                     proszę podać liczbę</span><br/>                 </p>                 <p>                     podaj wartość b:<br/>                     <input type="number" name="fieldb" ng-model="b" required integer />                     <span class="error" ng-show="calculator.fieldb.$invalid"/>                     <span  ng-show="calculator.fieldb.$error.number">                     proszę podać liczbę</span>                 </p>                 <p>                     <button type="submit"                                    ng-disabled="                                     calculator.fielda.$dirty &&                                     calculator.fielda.$invalid ||                                     calculator.fieldb.$dirty &&                                       calculator.fieldb.$invalid"                                   ng-click="count()">                         oblicz                     </button>                 </p>             </div>             <p class="field" id="result">x = {{c.tofixed(2)}}</p>         </div>

how should validate it. button doesn't seem disabled on load of page. how manage this? answerws.

you should remove both $dirty if want button disabled on start. , better use ng-pattern directive validate numbers 1-9 , omit "0". input should that:

<input type="number" name="fielda" ng-model="a" required ng-pattern="/[1-9]/" />

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