I have a range input (between [lowerValue] and [upperValue]) on a form and I want to make a reusable directive called 'validateGreaterThan' that can be attached to any form and use the ngModel $validators functionality so I can attach multiple ones onto an input.
You can check a simple demo on jsbin here:
http://jsbin.com/vidaqusaco/1/
I've set up a directive called nonNegativeInteger and that works correctly, however, the validateGreaterThan directive I have isn't working. How can I get it to reference the lowerValue?
I appreciate any help with this.
Here is the basic idea:-
Define 2 directives and let each directive refer to the other field buy passing its name. When the validator runs on the current field you can retrieve the model value of another field and now you have values from both fields and you can ensure the relation between the 2 fields.
As per my code below I have 2 fields minimumAmount and maximumAmount where the minimumAmount cannot be greater than the maximum amount and vice-versa.
<input name="minimumAmount" type="number" class="form-control"
ng-model="entity.minimumAmount"
less-than-other-field="maximumAmount" required/>
<input name="maximumAmount" type="number"
ng-model="entity.maximumAmount"
greater-than-other-field="minimumAmount"
class="form-control"/>
Here we have 2 directives lessThanOtherField and greaterThanOtherField and they both refer to other field as we pass the other field name. greater-than-other-field="minimumAmount" we are passing the other field.
.directive('lessThanOtherField', ['$timeout',function($timeout){
return {
require: 'ngModel',
link: function (scope, elm, attrs, ctrl) {
var xFieldValidatorName = 'lessThanOtherField';
var form = elm.parent().controller('form');
var otherFieldName = attrs[xFieldValidatorName];
var formFieldWatcher = scope.$watch(function(){
return form[otherFieldName];
}, function(){
formFieldWatcher();//destroy watcher
var otherFormField = form[otherFieldName];
var validatorFn = function (modelValue, viewValue) {
var otherFieldValue = otherFormField.hasOwnProperty('$viewValue') ? otherFormField.$viewValue : undefined;
if (angular.isUndefined(otherFieldValue)||otherFieldValue==="") {
return true;
}
if (+viewValue < +otherFieldValue) {
if (!otherFormField.$valid) {//trigger validity of other field
$timeout(function(){
otherFormField.$validate();
},100);//avoid infinite loop
}
return true;
} else {
// it is invalid, return undefined (no model update)
//ctrl.$setValidity('lessThanOtherField', false);
return false;
}
};
ctrl.$validators[xFieldValidatorName] = validatorFn;
});
}
};
}])
.directive('greaterThanOtherField', ['$timeout',function($timeout){
return {
require: 'ngModel',
link: function (scope, elm, attrs, ctrl) {
var xFieldValidatorName = 'greaterThanOtherField';
var form = elm.parent().controller('form');
var otherFieldName = attrs[xFieldValidatorName];
var formFieldWatcher = scope.$watch(function(){
return form[otherFieldName];
}, function(){
formFieldWatcher();//destroy watcher
var otherFormField = form[otherFieldName];
var validatorFn = function (modelValue, viewValue) {
var otherFieldValue = otherFormField.hasOwnProperty('$viewValue') ? otherFormField.$viewValue : undefined;
if (angular.isUndefined(otherFieldValue)||otherFieldValue==="") {
return true;
}
if (+viewValue > +otherFieldValue) {
if (!otherFormField.$valid) {//trigger validity of other field
$timeout(function(){
otherFormField.$validate();
},100);//avoid infinite loop
}
return true;
} else {
// it is invalid, return undefined (no model update)
//ctrl.$setValidity('lessThanOtherField', false);
return false;
}
};
ctrl.$validators[xFieldValidatorName] = validatorFn;
});
}
};
}])
I am trying to restrict input as numbers on below fields
Postal Code:
<input type="text" id="zipCode1" name="zipCode1" size="4" maxlength="5" ng-model="zipCode1" ng-change="myNumbers(zipCode1)" />
<input type="text" id="zipCode2" name="zipCode2" size="3" maxlength="4" ng-model="zipCode2" ng-change="myNumbers(zipCode2)" />
it doesn't work with
$scope.myNumbers = function(fieldName){
var tN = fieldName.replace(/[^\d]/g, "");
if(tN != fieldName)
fieldName = tN
};
It works with below code but changing both the fields
$scope.$watch('myNumbers', function() {
var tN = $scope.myNumbers.replace(/[^\d]/g, "");
if(tN != $scope.myNumbers)
$scope.myNumbers = tN;
})
Need to change the value for the input field where user is typing and not both
Use the directive found here: https://stackoverflow.com/a/19675023/149060 instead of the ng-change function. Replicated here for easy reference:
angular.module('app').
directive('onlyDigits', function () {
return {
restrict: 'A',
require: '?ngModel',
link: function (scope, element, attrs, ngModel) {
if (!ngModel) return;
ngModel.$parsers.unshift(function (inputValue) {
var digits = inputValue.split('').filter(function (s) { return (!isNaN(s) && s != ' '); }).join('');
ngModel.$viewValue = digits;
ngModel.$render();
return digits;
});
}
};
});
You could try adding to the inputs ng-pattern='/^\d{2}$/'
Here is a directive I've done to restrict the keys allowed.
angular.module('app').directive('restrictTo', function() {
return {
restrict: 'A',
link: function (scope, element, attrs) {
var re = RegExp(attrs.restrictTo);
var exclude = /Backspace|Enter|Tab|Delete|Del|ArrowUp|Up|ArrowDown|Down|ArrowLeft|Left|ArrowRight|Right/;
element[0].addEventListener('keydown', function(event) {
if (!exclude.test(event.key) && !re.test(event.key)) {
event.preventDefault();
}
});
}
}
});
And the input would look like:
<input type="text" name="zipCode1" maxlength="5" ng-model="zipCode1" restrict-to="[0-9]">
The regular expression evaluates the pressed key, not the value.
It also works perfectly with inputs type="number" because prevents from changing its value, so the key is never displayed and it does not mess with the model.
I need help to create a AngularJS directive with Complexify. It's a password meter. I needed this:
<input type="password" ng-model="password" />
<password-meter value="password" complexity="complexity"></passwordMeter>
<span class="label label-important" ng-show="complexity > 60">STRONG</span>
In my example, when password complexity is high, my <span> is display.
My code:
app.directive('passwordMeter', function() {
return {
restrict: 'E',
link: function link(scope, element, attrs) {
var minLengthPassword = 6;
var strengthScaleFactor = 1;
$(element).complexify({
minimumChars: minLengthPassword,
strengthScaleFactor: strengthScaleFactor
}, function(valid, complexity) {
if(valid) {
scope.complexity = complexity;
} else {
scope.complexity = 0;
}
});
scope.$watch('password', function() {
if(!scope.password) {
scope.complexity = 0;
}
});
}
};
});
Your code has some errors you need to fix:
If you define a directive name which is camel-case (passwordMeter) it maps to password-meter in your templates
To use the directive as an element like you do you need to set restrict: 'E' and not 'A'
jquery-complexify works on inputs so you need to include the input you define outside the password-meter directive inside your directive and reference it.
I've created a working plunker for you http://plnkr.co/edit/PdK8U7q3GzWVVUX5alrS?p=preview
I tried to use ng-model on input tag with type file:
<input type="file" ng-model="vm.uploadme" />
But after selecting a file, in controller, $scope.vm.uploadme is still undefined.
How do I get the selected file in my controller?
I created a workaround with directive:
.directive("fileread", [function () {
return {
scope: {
fileread: "="
},
link: function (scope, element, attributes) {
element.bind("change", function (changeEvent) {
var reader = new FileReader();
reader.onload = function (loadEvent) {
scope.$apply(function () {
scope.fileread = loadEvent.target.result;
});
}
reader.readAsDataURL(changeEvent.target.files[0]);
});
}
}
}]);
And the input tag becomes:
<input type="file" fileread="vm.uploadme" />
Or if just the file definition is needed:
.directive("fileread", [function () {
return {
scope: {
fileread: "="
},
link: function (scope, element, attributes) {
element.bind("change", function (changeEvent) {
scope.$apply(function () {
scope.fileread = changeEvent.target.files[0];
// or all selected files:
// scope.fileread = changeEvent.target.files;
});
});
}
}
}]);
I use this directive:
angular.module('appFilereader', []).directive('appFilereader', function($q) {
var slice = Array.prototype.slice;
return {
restrict: 'A',
require: '?ngModel',
link: function(scope, element, attrs, ngModel) {
if (!ngModel) return;
ngModel.$render = function() {};
element.bind('change', function(e) {
var element = e.target;
$q.all(slice.call(element.files, 0).map(readFile))
.then(function(values) {
if (element.multiple) ngModel.$setViewValue(values);
else ngModel.$setViewValue(values.length ? values[0] : null);
});
function readFile(file) {
var deferred = $q.defer();
var reader = new FileReader();
reader.onload = function(e) {
deferred.resolve(e.target.result);
};
reader.onerror = function(e) {
deferred.reject(e);
};
reader.readAsDataURL(file);
return deferred.promise;
}
}); //change
} //link
}; //return
});
and invoke it like this:
<input type="file" ng-model="editItem._attachments_uri.image" accept="image/*" app-filereader />
The property (editItem.editItem._attachments_uri.image) will be populated with the contents of the file you select as a data-uri (!).
Please do note that this script will not upload anything. It will only populate your model with the contents of your file encoded ad a data-uri (base64).
Check out a working demo here:
http://plnkr.co/CMiHKv2BEidM9SShm9Vv
How to enable <input type="file"> to work with ng-model
Working Demo of Directive that Works with ng-model
The core ng-model directive does not work with <input type="file"> out of the box.
This custom directive enables ng-model and has the added benefit of enabling the ng-change, ng-required, and ng-form directives to work with <input type="file">.
angular.module("app",[]);
angular.module("app").directive("selectNgFiles", function() {
return {
require: "ngModel",
link: function postLink(scope,elem,attrs,ngModel) {
elem.on("change", function(e) {
var files = elem[0].files;
ngModel.$setViewValue(files);
})
}
}
});
<script src="//unpkg.com/angular/angular.js"></script>
<body ng-app="app">
<h1>AngularJS Input `type=file` Demo</h1>
<input type="file" select-ng-files ng-model="fileArray" multiple>
<code><table ng-show="fileArray.length">
<tr><td>Name</td><td>Date</td><td>Size</td><td>Type</td><tr>
<tr ng-repeat="file in fileArray">
<td>{{file.name}}</td>
<td>{{file.lastModified | date : 'MMMdd,yyyy'}}</td>
<td>{{file.size}}</td>
<td>{{file.type}}</td>
</tr>
</table></code>
</body>
This is an addendum to #endy-tjahjono's solution.
I ended up not being able to get the value of uploadme from the scope. Even though uploadme in the HTML was visibly updated by the directive, I could still not access its value by $scope.uploadme. I was able to set its value from the scope, though. Mysterious, right..?
As it turned out, a child scope was created by the directive, and the child scope had its own uploadme.
The solution was to use an object rather than a primitive to hold the value of uploadme.
In the controller I have:
$scope.uploadme = {};
$scope.uploadme.src = "";
and in the HTML:
<input type="file" fileread="uploadme.src"/>
<input type="text" ng-model="uploadme.src"/>
There are no changes to the directive.
Now, it all works like expected. I can grab the value of uploadme.src from my controller using $scope.uploadme.
I create a directive and registered on bower.
This lib will help you modeling input file, not only return file data but also file dataurl or base 64.
{
"lastModified": 1438583972000,
"lastModifiedDate": "2015-08-03T06:39:32.000Z",
"name": "gitignore_global.txt",
"size": 236,
"type": "text/plain",
"data": "data:text/plain;base64,DQojaWdub3JlIHRodW1ibmFpbHMgY3JlYXRlZCBieSB3aW5kb3dz…xoDQoqLmJhaw0KKi5jYWNoZQ0KKi5pbGsNCioubG9nDQoqLmRsbA0KKi5saWINCiouc2JyDQo="
}
https://github.com/mistralworks/ng-file-model/
This is a slightly modified version that lets you specify the name of the attribute in the scope, just as you would do with ng-model, usage:
<myUpload key="file"></myUpload>
Directive:
.directive('myUpload', function() {
return {
link: function postLink(scope, element, attrs) {
element.find("input").bind("change", function(changeEvent) {
var reader = new FileReader();
reader.onload = function(loadEvent) {
scope.$apply(function() {
scope[attrs.key] = loadEvent.target.result;
});
}
if (typeof(changeEvent.target.files[0]) === 'object') {
reader.readAsDataURL(changeEvent.target.files[0]);
};
});
},
controller: 'FileUploadCtrl',
template:
'<span class="btn btn-success fileinput-button">' +
'<i class="glyphicon glyphicon-plus"></i>' +
'<span>Replace Image</span>' +
'<input type="file" accept="image/*" name="files[]" multiple="">' +
'</span>',
restrict: 'E'
};
});
For multiple files input using lodash or underscore:
.directive("fileread", [function () {
return {
scope: {
fileread: "="
},
link: function (scope, element, attributes) {
element.bind("change", function (changeEvent) {
return _.map(changeEvent.target.files, function(file){
scope.fileread = [];
var reader = new FileReader();
reader.onload = function (loadEvent) {
scope.$apply(function () {
scope.fileread.push(loadEvent.target.result);
});
}
reader.readAsDataURL(file);
});
});
}
}
}]);
function filesModelDirective(){
return {
controller: function($parse, $element, $attrs, $scope){
var exp = $parse($attrs.filesModel);
$element.on('change', function(){
exp.assign($scope, this.files[0]);
$scope.$apply();
});
}
};
}
app.directive('filesModel', filesModelDirective);
I had to do same on multiple input, so i updated #Endy Tjahjono method.
It returns an array containing all readed files.
.directive("fileread", function () {
return {
scope: {
fileread: "="
},
link: function (scope, element, attributes) {
element.bind("change", function (changeEvent) {
var readers = [] ,
files = changeEvent.target.files ,
datas = [] ;
for ( var i = 0 ; i < files.length ; i++ ) {
readers[ i ] = new FileReader();
readers[ i ].onload = function (loadEvent) {
datas.push( loadEvent.target.result );
if ( datas.length === files.length ){
scope.$apply(function () {
scope.fileread = datas;
});
}
}
readers[ i ].readAsDataURL( files[i] );
}
});
}
}
});
I had to modify Endy's directive so that I can get Last Modified, lastModifiedDate, name, size, type, and data as well as be able to get an array of files. For those of you that needed these extra features, here you go.
UPDATE:
I found a bug where if you select the file(s) and then go to select again but cancel instead, the files are never deselected like it appears. So I updated my code to fix that.
.directive("fileread", function () {
return {
scope: {
fileread: "="
},
link: function (scope, element, attributes) {
element.bind("change", function (changeEvent) {
var readers = [] ,
files = changeEvent.target.files ,
datas = [] ;
if(!files.length){
scope.$apply(function () {
scope.fileread = [];
});
return;
}
for ( var i = 0 ; i < files.length ; i++ ) {
readers[ i ] = new FileReader();
readers[ i ].index = i;
readers[ i ].onload = function (loadEvent) {
var index = loadEvent.target.index;
datas.push({
lastModified: files[index].lastModified,
lastModifiedDate: files[index].lastModifiedDate,
name: files[index].name,
size: files[index].size,
type: files[index].type,
data: loadEvent.target.result
});
if ( datas.length === files.length ){
scope.$apply(function () {
scope.fileread = datas;
});
}
};
readers[ i ].readAsDataURL( files[i] );
}
});
}
}
});
If you want something a little more elegant/integrated, you can use a decorator to extend the input directive with support for type=file. The main caveat to keep in mind is that this method will not work in IE9 since IE9 didn't implement the File API. Using JavaScript to upload binary data regardless of type via XHR is simply not possible natively in IE9 or earlier (use of ActiveXObject to access the local filesystem doesn't count as using ActiveX is just asking for security troubles).
This exact method also requires AngularJS 1.4.x or later, but you may be able to adapt this to use $provide.decorator rather than angular.Module.decorator - I wrote this gist to demonstrate how to do it while conforming to John Papa's AngularJS style guide:
(function() {
'use strict';
/**
* #ngdoc input
* #name input[file]
*
* #description
* Adds very basic support for ngModel to `input[type=file]` fields.
*
* Requires AngularJS 1.4.x or later. Does not support Internet Explorer 9 - the browser's
* implementation of `HTMLInputElement` must have a `files` property for file inputs.
*
* #param {string} ngModel
* Assignable AngularJS expression to data-bind to. The data-bound object will be an instance
* of {#link https://developer.mozilla.org/en-US/docs/Web/API/FileList `FileList`}.
* #param {string=} name Property name of the form under which the control is published.
* #param {string=} ngChange
* AngularJS expression to be executed when input changes due to user interaction with the
* input element.
*/
angular
.module('yourModuleNameHere')
.decorator('inputDirective', myInputFileDecorator);
myInputFileDecorator.$inject = ['$delegate', '$browser', '$sniffer', '$filter', '$parse'];
function myInputFileDecorator($delegate, $browser, $sniffer, $filter, $parse) {
var inputDirective = $delegate[0],
preLink = inputDirective.link.pre;
inputDirective.link.pre = function (scope, element, attr, ctrl) {
if (ctrl[0]) {
if (angular.lowercase(attr.type) === 'file') {
fileInputType(
scope, element, attr, ctrl[0], $sniffer, $browser, $filter, $parse);
} else {
preLink.apply(this, arguments);
}
}
};
return $delegate;
}
function fileInputType(scope, element, attr, ctrl, $sniffer, $browser, $filter, $parse) {
element.on('change', function (ev) {
if (angular.isDefined(element[0].files)) {
ctrl.$setViewValue(element[0].files, ev && ev.type);
}
})
ctrl.$isEmpty = function (value) {
return !value || value.length === 0;
};
}
})();
Why wasn't this done in the first place? AngularJS support is intended to reach only as far back as IE9. If you disagree with this decision and think they should have just put this in anyway, then jump the wagon to Angular 2+ because better modern support is literally why Angular 2 exists.
The issue is (as was mentioned before) that without the file api
support doing this properly is unfeasible for the core given our
baseline being IE9 and polyfilling this stuff is out of the question
for core.
Additionally trying to handle this input in a way that is not
cross-browser compatible only makes it harder for 3rd party solutions,
which now have to fight/disable/workaround the core solution.
...
I'm going to close this just as we closed #1236. Angular 2 is being
build to support modern browsers and with that file support will
easily available.
Alternatively you could get the input and set the onchange function:
<input type="file" id="myFileInput" />
document.getElementById("myFileInput").onchange = function (event) {
console.log(event.target.files);
};
Try this,this is working for me in angular JS
let fileToUpload = `${documentLocation}/${documentType}.pdf`;
let absoluteFilePath = path.resolve(__dirname, fileToUpload);
console.log(`Uploading document ${absoluteFilePath}`);
element.all(by.css("input[type='file']")).sendKeys(absoluteFilePath);