Angular Select

HTML

<div ng-app="myApp">
    <div ng-controller="MyCtrl">
       <button ng-click="isInput1ReadOnly = !isInput1ReadOnly">Click Me</button>
        <input type="text" ng-readonly="isInput1ReadOnly" value="Angular Rules!"/>
        Is it read-only? {{isInput1ReadOnly}}
    </div>
</div>

JavaScript

var app = angular.module('myApp', []);

app.controller('MyCtrl', function($scope) {
    // Set the starting value
    $scope.isInput1ReadOnly = false;
    $scope.p = "testp1";
    
});