I was wondering how to automatically format a number in an input field using an angularjs directive? When I type in an input field say 6042919283 I want it to be shown as 604-291-9283.
Thanks
You could use UI Utils mask It allows you to define an allowd input format and will handle the validation for you as well as the formatting
If your phone number is uniform i.e all the number is of digit 10 this one will work
app.directive('formatPhone', [
function() {
return {
require: 'ngModel',
restrict: 'A',
link: function(scope, elem, attrs, ctrl, ngModel) {
elem.add(phonenumber).on('keyup', function() {
var origVal = elem.val().replace(/[^\w\s]/gi, '');
if(origVal.length === 10) {
var str = origVal.replace(/(.{3})/g,"$1-");
var phone = str.slice(0, -2) + str.slice(-1);
jQuery("#phonenumber").val(phone);
}
});
}
};
}
]);
And your html;
<input type="text" id="phonenumber" ng-model="phonenumber" format-phone>
Here is how I did it with a custom directive.
customDirective.js
demoApp.directive('phoneInput', [ '$filter', '$browser', function($filter, $browser) {
return {
require: 'ngModel',
link: function($scope, $element, $attrs, ngModelCtrl) {
var listener = function() {
var value = $element.val().replace(/[^0-9]/g, '');
$element.val($filter('tel')(value, false));
};
// This runs when we update the text field
ngModelCtrl.$parsers.push(function(viewValue) {
return viewValue.replace(/[^0-9]/g, '').slice(0,10);
});
// This runs when the model gets updated on the scope directly and keeps our view in sync
ngModelCtrl.$render = function() {
$element.val($filter('tel')(ngModelCtrl.$viewValue, false));
};
$element.bind('change', listener);
$element.bind('keydown', function(event) {
var key = event.keyCode;
// If the keys include the CTRL, SHIFT, ALT, or META keys, or the arrow keys, do nothing.
// This lets us support copy and paste too
if (key == 91 || (15 < key && key < 19) || (37 <= key && key <= 40)){
return;
}
$browser.defer(listener); // Have to do this or changes don't get picked up properly
});
$element.bind('paste cut', function() {
$browser.defer(listener);
});
}
};
}]);
And using this custom filter you can filter the model.
customFilter.js
demoApp.filter('tel', function () {
return function (tel) {
console.log(tel);
if (!tel) { return ''; }
var value = tel.toString().trim().replace(/^\+/, '');
if (value.match(/[^0-9]/)) {
return tel;
}
var country, city, number;
switch (value.length) {
case 1:
case 2:
case 3:
city = value;
break;
default:
city = value.slice(0, 3);
number = value.slice(3);
}
if(number){
if(number.length>3){
number = number.slice(0, 3) + '-' + number.slice(3,7);
}
else{
number = number;
}
return ("(" + city + ") " + number).trim();
}
else{
return "(" + city;
}
};
});
HTML
<input type = "text" id="phonenumber" phone-input ng-model="USPhone" >
<p>{{USPhone | tel}}</p>
I wrote this, and works pretty well. The only catch is you cannot delete dashes "-" in the number. This code can be easily modified to account for that.
In addition, I have a validator, invalidFormat that a user can set a custom message in case the phone number is invalid
app.directive("phoneNumberValidator", function () {
return {
require: "ngModel",
restrict: "A",
link: function (scope, elem, attrs, ctrl) {
var domElement = elem[0]; // Get DOM element
var phoneNumberRegex = new RegExp("\\d{3}\\-\\d{3}\\-\\d{4}"); // Phone number regex
var cursorIndex; // Index where the cursor should be
// Create a parser to alter and validate if our
// value is a valid phone number
ctrl.$parsers.push(function (value) {
// If our value is non-existent, we return undefined
// WHY?: an angular model value should be undefined if it is empty
if (typeof value === "undefined" || value === null || value == "") {
ctrl.$setValidity('invalidFormat', true); // No invalid format if the value of the phone number is empty
return undefined;
}
// PARSER LOGIC
// =compare our value to a modified value after it has
// been transformed into a "nice" phone number. If these
// values are different, we set the viewValue to
// the "nice" phone number. If these values are the same,
// we render the viewValue (aka. "nice" phone number)
var prevValue, nextValue;
prevValue = value;
nextValue = value.replace(/[\D]/gi, ""); // Strip all non-digits
// Make the "nice" phone number
if (nextValue.length >= 4 && nextValue.length <= 6) {
nextValue = nextValue.replace(/(\d{3})(\d{3})?/, "$1-$2");
} else if (nextValue.length >= 7 && nextValue.length <= 10) {
nextValue = nextValue.replace(/(\d{3})(\d{3})(\d{4})?/, "$1-$2-$3");
}
// Save the correct index where the custor should be
// WHY?: we do this here because "ctrl.$render()" shifts
// the cursor index to the end of the phone number
cursorIndex = domElement.selectionStart;
if (prevValue != nextValue) {
ctrl.$setViewValue(nextValue); // *Calling this function will run all functions in ctrl.$parsers!
} else {
ctrl.$render(); // Render the new, "nice" phone number
}
// If our cursor lands on an index where a dash "-" is,
// move it up by one
if (cursorIndex == 4 || cursorIndex == 8) {
cursorIndex = cursorIndex + 1;
}
var valid = phoneNumberRegex.test(value); // Test the validity of our phone number
ctrl.$setValidity('invalidFormat', valid); // Set the validity of the phone number field
domElement.setSelectionRange(cursorIndex, cursorIndex); // Assign the cursor to the correct index
return value; // Return the updated value
});
}
}
});
The best place to put validators is in $parsers, which I found my answer from evidence found here: http://radify.io/blog/understanding-ngmodelcontroller-by-example-part-1/. This is why my answer is a bit different than the others.
In the HTML
<input type="tel" class="form-control" id="PhoneNumber" name="PhoneNumber" ng-model="PhoneNumber" placeholder="Phone" maxlength="12" ng-value="PhoneNumber" required phone-number-validator server-validation>
<p class="help-block" ng-if="PhoneNumber.$error.invalidFormat">Phone Number is invalid</p>
Amr Ibrahim
Custom directive for telephone format using angularjs
The field change format as user typing
Restricts the input to numbers only
Auto formats the input (541) 754-3010
app.directive("phoneNumberValidator", function () {
return {
restrict: 'A',
link: function (scope, elem, attrs, ctrl, ngModel) {
elem.add(phonenumber).on('keyup', function () {
var input = elem.val();
// Strip all characters from the input except digits
input = input.replace(/\D/g, '');
// Trim the remaining input to ten characters, to preserve phone number format
input = input.substring(0, 10);
// Based upon the length of the string, we add formatting as necessary
var size = input.length;
if (size == 0) {
input = input;
} else if (size < 4) {
input = '(' + input;
} else if (size < 7) {
input = '(' + input.substring(0, 3) + ') ' + input.substring(3, 6);
} else {
input = '(' + input.substring(0, 3) + ') ' + input.substring(3, 6) + ' - ' + input.substring(6, 10);
}
jQuery("#phonenumber").val(input);
});
}
}
});code form [ https://stackoverflow.com/a/30058928/6786941 ]
Wasn't a big fan of any of the answers here so came up with a directive of my own. It formats number with white space. Doesn't use jquery and you don't have to track key strokes.
.directive('reformatPhoneNumber', function() {
return {
require: 'ngModel',
link: function(scope, element, attrs, modelCtrl) {
modelCtrl.$parsers.push(function(number) {
var transformedNumber = number;
if (number.match(/^\d{4}$/)) {
transformedNumber = number.slice(0, 3) + " " + number.slice(3);
}
if(number.match(/^[\d\s]{8}$/)){
transformedNumber = number.slice(0, 7) + " " + number.slice(7);
}
if (number.length > 12) {
transformedNumber = number.slice(0, 12);
}
if (transformedNumber !== number) {
modelCtrl.$setViewValue(transformedNumber);
modelCtrl.$render();
}
return transformedNumber;
});
}
};
});
来源：https://stackoverflow.com/questions/22057481/a-directive-to-format-phone-number