Sean Sean - 4 months ago 79
AngularJS Question

AngularJS input mask with validation

I have a directive which has a mask and validation for an input control. It's basically a time input where the user can input something like 45 (45 mins) or 2.5 (2.5 hours => 150 minutes). The input is a

type=number
when editing but a
type=text
when displaying the result using a filter.

(Only increments of 15 mins are allowed, and the filter is applied on the blur event)

All works fine EXCEPT that the initial value, when I click into the textbox, gets lost. In the
focus
event, the
scope.minutes
value is undefined, where this should be the
90
value set in the controller. I can't figure out why.



angular.module('demoApp', [])
.controller('MainController', MainController)
.filter("hoursMinutes", function () {
return function (mins) {
if (mins == 0) return "0 mins";
var hours = ((mins - (mins % 60)) / 60);
var minutes = (mins % 60);
return (hours > 0 ? hours + " hr" + (hours === 1 ? "" : "s") : "") + (minutes > 0 ? " " + minutes + " min" + (minutes === 1 ? "" : "s") : "");
}
})
.directive("ixTimeEntry", function ($filter) {
return {
restrict: "A",
require: 'ngModel',
scope: {
minutes: "=",
filter: "@",
inputFormat: "@"
},
link: function (scope, element, attr, ngModel) {

// could set a max attribute, so mins can't be more than 1440 (a day)?

var inputFormat = scope.inputFormat || "minutes";
var filter = scope.filter || "hoursMinutes";

// for DOM -> model validation
ngModel.$parsers.unshift(function (value) {
var result = validate(value);
ngModel.$setValidity('ixTimeEntry', result.valid);
return result.value;
});

// for model -> DOM validation
ngModel.$formatters.unshift(function (value) {
ngModel.$setValidity('ixTimeEntry', true);
return $filter(filter)(value);
});

function validate(input) {
var result = { valid: false, value: input };
if (input === undefined) return result;
input = +input;
if (input === 0) return result;
if (input < 0) return result;

if (inputFormat === "minutes") {
// entering as minutes:
// if 15, 30, 45, 60, 75, 90, etc => treat as minutes
// if .25, .5, .75, 1, 1.25, ...12 => treat as hours
// else (e.g. 13, 14, 16, 17, 18, etc) => invalid
if (input % 15 === 0) result = { valid: true, value: input };
if (input % .25 === 0 && input <= 12) result = { valid: true, value: input * 60 };
} else if (inputFormat === "hours") {
// entering as hours:
// if .25, .5, .75, 1, 1.25, etc => treat as hours
// else => invalid
if (input % .25 === 0) result = { valid: true, value: input * 60 };
} else {
throw "Invalid inputFormat in timeEntry";
}

return result;
}

function addMask(text) {
return $filter(filter)(text);
}

function removeMask(text) {
if (inputFormat === "hours")
return +text / 60;
return text;
}

element.val(addMask(scope.minutes));

element.bind("blur", function () {
element.attr("type", "text");
scope.$apply(function () {
var value = validate(element.val()).value;
scope.minutes = value;
element.val(addMask(value));
});
});

element.bind("focus", function () {
element.attr("type", "number");
scope.$apply(function () {
element.val(removeMask(scope.minutes));
});
});
}
};
});;


function MainController() {
var vm = this;
vm.minutes1 = 90;
}

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>

<div ng-app="demoApp" ng-controller="MainController as vm">
<form id="timeForm" name="timeForm" >
<input type="text" class="form-control" name="time" placeholder="time" ix-time-entry input-format="minutes" minutes="vm.minutes" filter="hoursMinutes" ng-required="true" ng-model="vm.minutes1" />
</form>
<br>
Model: {{vm.minutes1}}<br>
Valid: {{timeForm.time.$valid}}<br>
</div>




Answer

You only set vm.minutes1 = 90; in your MainController. It works if you set vm.minutes = 90; as well.

angular.module('demoApp', [])
	.controller('MainController', MainController)
  .filter("hoursMinutes", function () {
            return function (mins) {
                if (mins == 0) return "0 mins";
                var hours = ((mins - (mins % 60)) / 60);
                var minutes = (mins % 60);
                return (hours > 0 ? hours + " hr" + (hours === 1 ? "" : "s") : "") + (minutes > 0 ? " " + minutes + " min" + (minutes === 1 ? "" : "s") : "");
            }
        })
  .directive("ixTimeEntry", function ($filter) {
            return {
                restrict: "A",
                require: 'ngModel',
                scope: {
                    minutes: "=",
                    filter: "@",
                    inputFormat: "@"
                },
                link: function (scope, element, attr, ngModel) {
                    
                    // could set a max attribute, so mins can't be more than 1440 (a day)?

                    var inputFormat = scope.inputFormat || "minutes";
                    var filter = scope.filter || "hoursMinutes";

                    // for DOM -> model validation
                    ngModel.$parsers.unshift(function (value) {
                        var result = validate(value);
                        ngModel.$setValidity('ixTimeEntry', result.valid);
                        return result.value;
                    });

                    // for model -> DOM validation
                    ngModel.$formatters.unshift(function (value) {
                        ngModel.$setValidity('ixTimeEntry', true);
                        return $filter(filter)(value);
                    });

                    function validate(input) {
                        var result = { valid: false, value: input };
                        if (input === undefined) return result;
                        input = +input;
                        if (input === 0) return result;
                        if (input < 0) return result;

                        if (inputFormat === "minutes") {
                            // entering as minutes:
                            // if 15, 30, 45, 60, 75, 90, etc       => treat as minutes
                            // if .25, .5, .75, 1, 1.25, ...12      => treat as hours
                            // else (e.g. 13, 14, 16, 17, 18, etc)  => invalid 
                            if (input % 15 === 0) result = { valid: true, value: input };
                            if (input % .25 === 0 && input <= 12) result = { valid: true, value: input * 60 };
                        } else if (inputFormat === "hours") {
                            // entering as hours:
                            // if .25, .5, .75, 1, 1.25, etc        => treat as hours
                            // else                                 => invalid
                            if (input % .25 === 0) result = { valid: true, value: input * 60 };
                        } else {
                            throw "Invalid inputFormat in timeEntry";
                        }

                        return result;
                    }

                    function addMask(text) {
                        return $filter(filter)(text);
                    }

                    function removeMask(text) {
                        if (inputFormat === "hours")
                            return +text / 60;
                        return text;
                    }

                    element.val(addMask(scope.minutes));

                    element.bind("blur", function () {
                        element.attr("type", "text");
                        scope.$apply(function () {
                            var value = validate(element.val()).value;
                            scope.minutes = value;
                            element.val(addMask(value));
                        });
                    });

                    element.bind("focus", function () {
                        element.attr("type", "number");
                        scope.$apply(function () {
                            element.val(removeMask(scope.minutes));
                        });
                    });
                }
            };
        });;


function MainController() {
	var vm = this;
  vm.minutes = 90;
  vm.minutes1 = 90;
}
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>

<div ng-app="demoApp" ng-controller="MainController as vm">
<form id="timeForm" name="timeForm" >
<input type="text" class="form-control" name="time" placeholder="time" ix-time-entry input-format="minutes"  minutes="vm.minutes" filter="hoursMinutes" ng-required="true" ng-model="vm.minutes1" />
</form>
<br>
Model: {{vm.minutes1}}<br>
Valid: {{timeForm.time.$valid}}<br>
</div>