I using elastic directive for resizing textarea from this answer.
But i using ng-show for textarea, and on click height of textarea is 0.
So i need to use $watch somehow to trigger directive on click, but don't know how.
Html:
<textarea ng-show="showOnClick" elastic ng-model="someProperty"></textarea>
<a ng-click="showOnClick = true"> Show text area </a>
Directive:
.directive('elastic', [
'$timeout',
function($timeout) {
return {
restrict: 'A',
link: function($scope, element) {
$scope.initialHeight = $scope.initialHeight || element[0].style.height;
var resize = function() {
element[0].style.height = $scope.initialHeight;
element[0].style.height = "" + element[0].scrollHeight + "px";
};
element.on("input change", resize);
$timeout(resize, 0);
}
};
}
]);
Here is JSFIDDLE
as requested, the solution is to $watch the ngShow attr and run some sort of init function when the value is true.
user produced jsfiddle
example code:
.directive('elastic', [
'$timeout',
function($timeout) {
return {
restrict: 'A',
scope: {
ngShow: "="
},
link: function($scope, element, attr) {
$scope.initialHeight = $scope.initialHeight || element[0].style.height;
var resize = function() {
element[0].style.height = $scope.initialHeight;
element[0].style.height = "" + element[0].scrollHeight + "px";
};
if (attr.hasOwnProperty("ngShow")) {
function ngShow() {
if ($scope.ngShow === true) {
$timeout(resize, 0);
}
}
$scope.$watch("ngShow", ngShow);
setTimeout(ngShow, 0);
}
element.on("input change", resize);
$timeout(resize, 0);
}
};
}
]);
I start with angularJS and I want to check if the email entered in the form already exists or not . for that, I will use RESTto communicate withe back_end.My problem is : how to check email before sending the form with a directive and display an error message if the email is already used.
<form name="registrationForm">
<div>
<label>Email</label>
<input type="email" name="email" class="form-group"
ng-model="registration.user.email"
ng-pattern="/^[_a-z0-9]+(\.[_a-z0-9]+)*#[a-z0-9-]+(\.[a-z0-9-]+)*(\.[a-z]{2,8})$/"
required compare-to="registration.user.email"
/>
the model
demoApp.directive('existTo', [function () {
return {
require: "ngModel",
scope: {
otherModelValue: "=existTo"
},
link: function(scope, element, attributes, ngModel) {
ngModel.$validators.existTo = function(modelValue) {
return modelValue == scope.otherModelValue;
};
scope.$watch("otherModelValue", function() {
ngModel.$validate();
});
}
}; }]);
back_end checkmail: the controller
demoApp.controller('signupCtrl',function($scope,$http) {
$scope.verficationEmail = function(mail) {
$scope.test = mail;
var urll="";
var test="";
$scope.urll="http://localhost:8080/app/personne/verifmail?msg=";
$scope.aplrest=$scope.urll+$scope.test;
var ch3=$scope.aplrest;
$http.post(ch3).
success(function(respons) {
$scope.data = respons;
$scope.valid = respons.valid;
if ( $scope.valid == "false") {
$scope.msgalert="mail used";
}
})
};});
thank you in advance for your assistance
You will most likely want to put the verficiation function in a service and inject it wherever it's needed:
demoApp.factory('verifyEmail', function() {
return function(mail) {
var test=mail;
var urll="http://localhost:8080/app/personne/verifmail?msg=";
var aplrest=urll+test;
var ch3=aplrest;
return $http.post(ch3)
};
});
Then...
In your directive:
demoApp.directive('existTo', ["$q","verifyEmail",function ($q, verifyEmail) {
return {
require: "ngModel",
scope: {
// This is probably not needed as ngModel's
// validators will pass the current value anyway
otherModelValue: "=existTo"
},
link: function(scope, element, attributes, ngModel) {
// Note the change to $asyncValidators here <-------------
ngModel.$asyncValidators.existTo = function(modelValue) {
var deferred = $q.defer()
verifyEmail(modelValue).then(function(respons){
deferred.resolve(respons.valid);
});
return deferred.promise
};
scope.$watch("otherModelValue", function() {
ngModel.$validate();
});
}
}; }]);
In your controller:
demoApp.controller('signupCtrl',function($scope,$http,verifyEmail) {
$scope.verficationEmail = function (mail) {
verifyEmail(mail).success(function(respons) {
$scope.data = respons;
$scope.valid = respons.valid;
if ( $scope.valid == "false") {
$scope.msgalert="mail used";
}
});
}
});
Also, in your html you dont seem to be actually using the directive exist-to, I'm guessing that's what compare-to should have been. But, in any case, it might look like this:
<input type="email" name="email" class="form-group"
ng-model="registration.user.email"
ng-pattern="/^[_a-z0-9]+(\.[_a-z0-9]+)*#[a-z0-9-]+(\.[a-z0-9-]+)*(\.[a-z]{2,8})$/"
required exist-to
/>
Note that there's no need to pass the model value to the directive
Hope that helps.
We have requirement to show a drop down when user enters a "#".
I am planning to have a directive as following:
app.controller('MainCtrl', function($scope) {
$scope.values = ['#'];
$scope.valuesEntered = false;
});
app.directive('identifier', function ($parse) {
return {
scope: {
values: '=values'
},
link: function (scope, elm, attrs) {
elm.bind('keypress', function(e){
var char = String.fromCharCode(e.which||e.charCode||e.keyCode), matches = [];
angular.forEach(scope.values, function(value, key){
if(char === value) matches.push(char);
}, matches);
if(matches.length !== 0){
$scope.valuesEntered = true;
}
});
}
}
});
Will this be ok ?
Here is a simple directive I made that will allow you to specify an expression to evaluate when a given key is pressed or one of an array of keys is pressed.
Note that this is a one-way street. There is currently no going back once you have detected that keypress, even if the user pressed backspace.
var app = angular.module('sample', []);
app.controller('mainCtrl', function($scope) {
$scope.values = ['#', '!'];
$scope.valuesEntered = false;
$scope.valuesEntered2 = false;
});
app.directive('whenKeyPressed', function($parse) {
return {
restrict: 'A',
scope: {
action: '&do'
},
link: function(scope, elm, attrs) {
var charCodesToMatch = [];
attrs.$observe('whenKeyPressed', function(keys) {
if (angular.isArray(keys))
charCodesToMatch = keys.map(function(key) {
if (angular.isString(key))
return key.charCodeAt(0);
});
else if (angular.isString(keys))
charCodesToMatch = keys.split('').map(function(ch) {
return ch.charCodeAt(0);
});
});
elm.bind('keypress', function(e) {
var charCode = e.which || e.charCode || e.keyCode;
if (charCodesToMatch.indexOf(charCode) > -1)
scope.action();
});
}
}
});
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<div ng-app="sample">
<div ng-controller="mainCtrl">
<p>Values "#" entered? {{valuesEntered}}</p>
<textarea ng-model="str" when-key-pressed="#" do="valuesEntered = true"></textarea>
<p>Values {{values}} entered 2: {{valuesEntered2}}</p>
<textarea ng-model="str2" when-key-pressed="{{values}}" do="valuesEntered2 = true"></textarea>
</div>
</div>
Plunkr demo
I have a search input field with a requery function bound to the ng-change.
<input ng-model="search" ng-change="updateSearch()">
However this fires too quickly on every character. So I end up doing something like this alot:
$scope.updateSearch = function(){
$timeout.cancel(searchDelay);
searchDelay = $timeout(function(){
$scope.requery($scope.search);
},300);
}
So that the request is only made 300ms after the user has stopped typing. Is there any solution to wrap this in a directive?
As of angular 1.3 this is way easier to accomplish, using ngModelOptions:
<input ng-model="search" ng-change="updateSearch()" ng-model-options="{debounce:3000}">
Syntax: {debounce: Miliseconds}
To solve this problem, I created a directive called ngDelay.
ngDelay augments the behavior of ngChange to support the desired delayed behavior, which provides updates whenever the user is inactive, rather than on every keystroke. The trick was to use a child scope, and replace the value of ngChange to a function call that includes the timeout logic and executes the original expression on the parent scope. The second trick was to move any ngModel bindings to the parent scope, if present. These changes are all performed in the compile phase of the ngDelay directive.
Here's a fiddle which contains an example using ngDelay:
http://jsfiddle.net/ZfrTX/7/ (Written and edited by me, with help from mainguy and Ryan Q)
You can find this code on GitHub thanks to brentvatne. Thanks Brent!
For quick reference, here's the JavaScript for the ngDelay directive:
app.directive('ngDelay', ['$timeout', function ($timeout) {
return {
restrict: 'A',
scope: true,
compile: function (element, attributes) {
var expression = attributes['ngChange'];
if (!expression)
return;
var ngModel = attributes['ngModel'];
if (ngModel) attributes['ngModel'] = '$parent.' + ngModel;
attributes['ngChange'] = '$$delay.execute()';
return {
post: function (scope, element, attributes) {
scope.$$delay = {
expression: expression,
delay: scope.$eval(attributes['ngDelay']),
execute: function () {
var state = scope.$$delay;
state.then = Date.now();
$timeout(function () {
if (Date.now() - state.then >= state.delay)
scope.$parent.$eval(expression);
}, state.delay);
}
};
}
}
}
};
}]);
And if there are any TypeScript wonks, here's the TypeScript using the angular definitions from DefinitelyTyped:
components.directive('ngDelay', ['$timeout', ($timeout: ng.ITimeoutService) => {
var directive: ng.IDirective = {
restrict: 'A',
scope: true,
compile: (element: ng.IAugmentedJQuery, attributes: ng.IAttributes) => {
var expression = attributes['ngChange'];
if (!expression)
return;
var ngModel = attributes['ngModel'];
if (ngModel) attributes['ngModel'] = '$parent.' + ngModel;
attributes['ngChange'] = '$$delay.execute()';
return {
post: (scope: IDelayScope, element: ng.IAugmentedJQuery, attributes: ng.IAttributes) => {
scope.$$delay = {
expression: <string>expression,
delay: <number>scope.$eval(attributes['ngDelay']),
execute: function () {
var state = scope.$$delay;
state.then = Date.now();
$timeout(function () {
if (Date.now() - state.then >= state.delay)
scope.$parent.$eval(expression);
}, state.delay);
}
};
}
}
}
};
return directive;
}]);
interface IDelayScope extends ng.IScope {
$$delay: IDelayState;
}
interface IDelayState {
delay: number;
expression: string;
execute(): void;
then?: number;
action?: ng.IPromise<any>;
}
This works perfectly for me: JSFiddle
var app = angular.module('app', []);
app.directive('delaySearch', function ($timeout) {
return {
restrict: 'EA',
template: ' <input ng-model="search" ng-change="modelChanged()">',
link: function ($scope, element, attrs) {
$scope.modelChanged = function () {
$timeout(function () {
if ($scope.lastSearch != $scope.search) {
if ($scope.delayedMethod) {
$scope.lastSearch = $scope.search;
$scope.delayedMethod({ search: $scope.search });
}
}
}, 300);
}
},
scope: {
delayedMethod:'&'
}
}
});
Using the directive
In your controller:
app.controller('ctrl', function ($scope,$timeout) {
$scope.requery = function (search) {
console.log(search);
}
});
In your view:
<div ng-app="app">
<div ng-controller="ctrl">
<delay-search delayed-method="requery(search)"></delay-search>
</div>
</div>
I know i'm late to the game but,hopefully this will help anyone still using 1.2.
Pre ng-model-options i found this worked for me, as ngchange will not fire when the value is invalid.
this is a slight variation on #doug's answer as it uses ngKeypress which doesn't care what state the model is in.
function delayChangeDirective($timeout) {
var directive = {
restrict: 'A',
priority: 10,
controller: delayChangeController,
controllerAs: "$ctrl",
scope: true,
compile: function compileHandler(element, attributes) {
var expression = attributes['ngKeypress'];
if (!expression)
return;
var ngModel = attributes['ngModel'];
if (ngModel) {
attributes['ngModel'] = '$parent.' + ngModel;
}
attributes['ngKeypress'] = '$$delay.execute()';
return {
post: postHandler,
};
function postHandler(scope, element, attributes) {
scope.$$delay = {
expression: expression,
delay: scope.$eval(attributes['ngKeypressDelay']),
execute: function () {
var state = scope.$$delay;
state.then = Date.now();
if (scope.promise) {
$timeout.cancel(scope.promise);
}
scope.promise = $timeout(function() {
delayedActionHandler(scope, state, expression);
scope.promise = null;
}, state.delay);
}
};
}
}
};
function delayedActionHandler(scope, state, expression) {
var now = Date.now();
if (now - state.then >= state.delay) {
scope.$parent.$eval(expression);
}
};
return directive;
};
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);