Develop Reference

How to simulate an autofocus

I created a webview (Android) for our site.
I put the input in autofocus:
<input name="barcode"
type="search"
placeholder="Scan Barcode"
class="form-control"
autocomplete="off"
autofocus
required>
When the page is loaded the input is selected but the keyboard of Android does not open => Perfect
But when I focus on this input the android keyboard opens and I do not want it to open because this input is only used to scan barcodes
So I would like to "simulate" an autofocus when closing a modal (for example) rather than a simple focus, how to do?
$('.modal').on('hidden.bs.modal', function (e) {
$("input[name='barcode']").focus();
});
EDIT : More details :
We use these scannettes to access our intranet site :
https://www.jmprime.co.uk/product_info.php/android-barcode-scanner-with-gun-grip-rugged-handheld-ip67-device-with-1d-barcode-reader-p-238
On the page in question there is only one input, the goal is to enter the input without opening the android keyboard in order to scan a bar code (they are then sent to the database)

As of This answer, readonly seems to work.
I found it difficult to work directly on the input, so I would still use the trick of the fake input.
With timeout set at 1ms it works like charm. (updated fiddle below)
<input id="barcode" name="barcode" type="hidden" placeholder="Scan Barcode" required>
<label for="barcode" class="your-cool-class-to-make-this-look-like-an-input" />
With the for attribute, when clicked, it will focus the related input.
https://jsfiddle.net/ubdnvsk0/26/

Try this:
I used Bootstrap 4 for modaland jQuery.
I forgot to why .focus() sometimes doesn't execute but I remember by putting it into setTimeout() with a time of 0, it does the trick.
Just in case you get confused with the code: () => {} is similar to
function() {}, it's an anonymous function / callback
Arrow functions are a more concise way to write function, introduced
in ES6.
Arrow functions are anonymous functions, which means you
cannot name it. Arrow functions do not bind to this, they don't create
their own this, thus the enclosing this is being used.
Reading Material: 'Arrow Functions - developer.mozilla.org'
$(document).ready(() => {
$('#myModal').on('hidden.bs.modal', () => {
setTimeout(() => {
$("#barcode").focus();
}, 0);
})
});
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.1.0/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.0/umd/popper.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.1.0/js/bootstrap.min.js"></script>
<div class="container">
<input id="barcode" name="barcode" type="search" placeholder="Scan Barcode" class="form-control" autocomplete="off" autofocus required readonly><br>
<!-- Button to Open the Modal -->
<button type="button" class="btn btn-primary" data-toggle="modal" data-target="#myModal">
Open modal
</button>
<!-- The Modal -->
<div class="modal" id="myModal">
<div class="modal-dialog">
<div class="modal-content">
<!-- Modal Header -->
<div class="modal-header">
<h4 class="modal-title">Modal Heading</h4>
<button type="button" class="close" data-dismiss="modal">×</button>
</div>
<!-- Modal body -->
<div class="modal-body">
Modal body..
</div>
<!-- Modal footer -->
<div class="modal-footer">
<button type="button" class="btn btn-danger" data-dismiss="modal">Close</button>
</div>
</div>
</div>
</div>
</div>

Weird behaviour of my scope variables

I am new in this field and want to write a app, now I meet some problems. Here is a simple version of my code, what I want is the API only show signUp first. After I press signUp and press submit the button shown should be only signout
Now, my scope variable doesn't work, two button show here. Could you modify it and tell me the reason? Please use the rootscope and scope and sc.logIn() if possible so that I can know how to write in this way. Thanks!
https://plnkr.co/edit/ewhLZsKKTWTzlECsj4xO?p=preview
angular.module('myApp',['myApp.dashboard','myApp.signUp']);
angular.module('myApp.dashboard').controller('mainControl',mainControl);
mainControl.$inject = ['$rootScope','$scope'];
function mainControl($rootScope,$scope){
$rootScope.logged=false;
$scope.logged=$rootScope.logged;
}
angular.module('myApp.signUp').controller('signUpControl',signUpControl);
signUpControl.$inject = ['$rootScope','$scope'];
function signUpControl($rootScope){
alert("haha");
this.logIn=function(){
$rootScope.logged=true;
};
}

There are couple of issues with your code.
Whenever you declare a module without a second argument, it just tries to fetch the module that is already declared / defined. In order to create a new module, you need to pass in the dependencies or an empty array, if there are no dependencies.
Also, you need to watch on the changes being done to the scope to ensure your changes are notified to the controllers to make them visible on the view.
Here is the working solution:
angular.module('myApp', ['myApp.dashboard', 'myApp.signUp']);
angular.module('myApp.dashboard', []).controller('mainControl', mainControl);
function mainControl($rootScope, $scope) {
$rootScope.logged = false;
$rootScope.$watch(() => $rootScope.logged, function() {
$scope.logged = $rootScope.logged;
});
}
mainControl.$inject = ['$rootScope', '$scope'];
angular.module('myApp.signUp', []).controller('signUpControl', signUpControl);
signUpControl.$inject = ['$rootScope', '$scope'];
function signUpControl($rootScope) {
this.logIn = function() {
var a = 1;
$rootScope.logged = true;
};
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.5.8/angular.min.js"></script>
<div ng-app="myApp">
<div ng-controller="mainControl as mc">
<div>{{mc.logged}}
<div ng-hide="logged">
<button type="button" class="btn" data-toggle="modal" data-target=".signUp">Sign Up</button>
</div>
<div ng-show="logged">
<button>Sign Out</button>
</div>
</div>
<div class="signUp modal fade" id="signUp" ng-controller='signUpControl as sc'>
<div class="modal-dialog">
<div class="modal-content">
<div class="modal-header">
<h4 class="modal-title">sigh up</h4>
<button type="button" class="close" data-dismiss="modal" aria-label="Close">×</button>
</div>
<div class="modal-body">
<form id="signUpForm" name="signUpForm" ng-submit="sc.logIn()">
<label for="email">
<span>email:</span>
<input type="email" name="email">
</label>
<button class="submit" id="signUpSubmit" type="submit" value="signUp">submit</button>
</form>
</div>
<div class="modal-footer">
</div>
</div>
</div>
</div>
</div>
</div>
For some reason the code snippet doesnt let me submit the form.
You can find a working solution here : Codepen

It is not weird at all.
Open your console, it shows errors.
Your main problem is angular bootstrap error.
angular.module('myApp.dashboard', [])
------------------------------- ^^ ------- must be an array even empty

Reset data on click for a different controller

I have two divs - the first contains the second. The contained div has its own controller. When I click an icon button in the container, I change a variable which then affects the visibility of the contained div.
It looks like this:
<div ng-controller="BarController">
<div class="navbar navbar-default navbar-fixed-top">
<div class="container-fluid">
<div class="col-lg-2 page-title">My Page</div>
<div class="col-lg-10">
<span class="actions">
<i class="fa fa-lg fa-download fa-inverse" tooltip="Download"
ng-click="showSecondaryBar=!showSecondaryBar"></i>
</span>
</div>
</div>
</div>
<div class="download navbar download-in download-out"
ng-class="{'myhidden': !showSecondaryBar}"
ng-cloak>
<div class="col-lg-offset-4 col-lg-4 form-inline form-group" ng-controller="TagsController">
<div class="download-label col-lg-6">
<label>Download by tags:</label>
</div>
<div class="download-tags col-lg-6">
<tags-input class="bootstrap" spellcheck="false" min-length="1" ng-model="tags" add-from-autocomplete-only="true">
<auto-complete source="loadTags($query)" min-length="1" load-on-down-arrow="true"
load-on-focus="true" max-results-to-show="5"
highlight-matched-text="false"></auto-complete>
</tags-input>
</div>
</div>
</div>
</div>
The <tags-input> is taken from ng-tags-input and I would like to reset the tags that were already typed to it whenever the icon button is clicked (which changes the visilibyt of the div that contains the ng-tags-input).
Problem is, because I have the TagsController which contains the data (tags) and this data is not visible in the BarController, I'm not sure how I can reset the tags array to become empty.
I thought of using a service but it fills like too much of a coupling. I would prefer to have a function in TagsController which is called upon click. But I can't figure out how to do it from another controller

You are right you have to use a service.
Why don't you use a broadcast as your TagsController is included in BarController?
You can include a scope.broadcast("Event") in BarController
Then a "on" listener on TagsController who will reset the tags array when "Event" Occur.
I would personnaly to this.
https://docs.angularjs.org/api/ng/type/$rootScope.Scope

You can use $broadcast on $rootScope to send an event to TagsController. So TagsController can receive this event by registering an event listener for it. See following example.
Refer to $rootScope API docs
angular.module('app',[])
.controller('ParentController', function($rootScope) {
var parentCtrl = this;
parentCtrl.someFlag = true;
parentCtrl.changeFlag = function() {
parentCtrl.someFlag = !parentCtrl.somFlag;
$rootScope.$broadcast('resettags', {'defaultTags': 'whatever_tag'});
}
})
.controller('ChildController', function($rootScope){
var childCtrl = this;
childCtrl.tags = "Some tags entered by user";
$rootScope.$on('resettags', function(event, args) {
childCtrl.tags = args.defaultTags;
});
});
.myHidden {
display: none;
}
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<div ng-app="app">
<div id="main" ng-controller="ParentController as parentCtrl">
<button type="button" ng-click="parentCtrl.changeFlag()">Toggle</button>
<div ng-class="{'myHidden' : !parentCtrl.someFlag}">
<div ng-controller="ChildController as childCtrl">
<h1>{{childCtrl.tags}}</h1>
</div>
</div>
</div>
</div>

How to properly open and close Bootstrap modal from AngularJS

On my html page, I got just a simple Bootstrap modal and button to call it:
<button class="btn btn-primary" data-toggle="modal" data-target="#addUpdateGroup">Add group</button>
<div class="modal fade" id="addUpdateGroup" tabindex="-1" role="dialog" aria-labelledby="addUpdateGrouplLabel" aria-hidden="true">
<div class="modal-dialog">
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal"><span aria-hidden="true">×</span><span class="sr-only">Close</span></button>
</div>
<form name="addUpdateGroupForm" ng-submit="addUpdateGroupForm.$valid && groupCtrl.addUpdateGroup()" novalidate>
<div class="modal-body">
<input type="hidden" ng-model="groupCtrl.group.id" name="groupid" />
<label for="groupname">Group name:</label>
<br>
<input ng-model="groupCtrl.group.name" type="text" name="groupname" id="groupname" required />
<br><br>
<label for="groupcolor">Boja grupe:</label>
</div>
<div class="modal-footer">
<button type="submit" class="btn btn-primary">Add</button>
<button type="button" class="btn btn-default" data-dismiss="modal">Cancel</button>
</div>
</form>
</div>
</div>
</div>
It's a just simple form. The validation is done by AngularJS.
Now...when user submits the form, I'd like for the modal to close, but ONLY if it was valid input.
So I've put the code for closing the modal into the controller:
this.addUpdateGroup = function() {
// Adding a new group
if (typeof this.group.id === 'undefined') {
this.id += 1;
this.group.id = this.id;
this.groups.push(this.group);
// Updating an existing group
} else {
this.groups[this.group.id].name = this.group.name;
this.groups[this.group.id].color = this.group.color;
}
// Clean the form and remove the modal
this.group = {};
$scope.addUpdateGroupForm.$setPristine(true);
$('.modal').modal('hide');
};
But this doesn't follow the best practice of not manipulating the DOM from the controller.
QUESTION: Is there a better way? How would you implement a modal which needs to be shown or hidden when certain function in controller is called?

You are not following Angular best practices. If you havent done so already, review this legendary answer: https://stackoverflow.com/a/15012542/202913 Specifically points 1 - 3 of that post.
That out of the way, you should be using either of the following two libraries. Both of them implement Bootstrap's functionality, but with a native Angular implementation, i.e. it does not rely on the Javascript library of Bootstrap (but does use the Bootstrap's CSS):
angular-ui/bootstrap
angular-strap
Both are excellent, so use whichever library feels more comfortable to your coding style.

Modal Form Submission without refresh

I have a modal window that pops up when I want to add a new project to my dashboard. I have gotten it to work with jquery post however, I cannot prevent it from refreshing. What I want to do is after the project is added to the database, show a success message and close the modal window after few seconds and not refresh the page (parent page of modal).
Here is my modal
<div class="modal fade" id="add-project-dialog" tabindex="-1" role="dialog" aria-labelledby="basicModal" aria-hidden="true">
<div class="modal-dialog">
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal" aria-hidden="true">&times;</button>
<h4 class="modal-title" id="myModalLabel">Add a new Project</h4>
</div>
<div class="modal-body">
<h3>New Project:</h3>
<form class="form-horizontal" id="add-project-form" action="/projects/add" method="POST">
<fieldset>
<!-- Text input-->
<div class="form-group">
<label class="col-md-4 control-label" for="name">Project Name</label>
<div class="col-md-4">
<input id="name" name="name" type="text" placeholder="" class="form-control input-md">
</div>
</div>
<!-- Text input-->
<div class="form-group">
<label class="col-md-4 control-label" for="description">Project Description</label>
<div class="col-md-4">
<input id="description" name="description" type="text" placeholder="" class="form-control input-md">
</div>
</div>
<!-- Text input-->
<div class="form-group">
<label class="col-md-4 control-label" for="project_state">Project State</label>
<div class="col-md-4">
<input id="project_state" name="project_state" type="text" placeholder="" class="form-control input-md">
</div>
</div>
</fieldset>
<div class="modal-footer">
<button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
<button id="add-btn" class="btn" type="submit">Add</button>
</div>
</form>
</div>
</div>
Here is my project-dashboard.js
AddProject = function(){
$(document).ready(function() {
$("#submit").submit(function(event){
event.preventDefault();
$.ajax({
url: "/projects/add",
type:"POST",
data:
{
'name': $('#name').val(),
'description': $('#description').val(),
'project_state': $('#project_state').val()
}
});
});
});
}
My views.py
class AddProject(webapp2.RedirectHandler):
def get(self):
template_values = {
#'greetings': greetings,
#'url_linktext': url_linktext,
}
path = os.path.join(os.path.dirname(__file__), '../templates/project-add.html')
self.response.write(template.render(path, template_values))
def post(self):
project = Project()
project.name = self.request.get('name')
project.description = self.request.get('description')
project.project_state = self.request.get('project_state')
time.sleep(2)
project.put()
self.redirect('/projects')
I have tried removing the self.redirect('/projects') however that only takes me to a blank page that is /projects/add (that is the action in the form).

The issue is that you added .ready(foo) handler inside of the AddProject function. I suppose that document is loaded when AddProject is called.
Another issue is that in your HTML, the form has id add-project-form, so you should do $("#add-project-form") instead of $("#submit").
$(document).ready(function () {
$("#add-project-form").submit(function(event){
event.preventDefault();
$.ajax({
url: "/projects/add",
type:"POST",
data:
{
'name': $('#name').val(),
'description': $('#description').val(),
'project_state': $('#project_state').val()
}
});
});
});
});
Take ready handler outside of the AddProject function and it should work (the submit handler is added).

Edit: After some debugging, the answer was to use the right id and proper placing of the javascript code, as noted by the comments.
For starters, a refresh is easy to avoid, just make sure to prevent the default event from running; since you're using jQuery, I would recommend doing return false to end the function, since it both 'prevents default' and 'stops propagation'.
So the first thing you should do is check if your javascript code is actually running and not erring in the middle of execution. If everything is fine there, the worst case is that the project is not actually added (server side error) but the page should not refresh.
Your server side code has nothing to do with the refresh (if it's being properly hijacked), so the response doesn't really matter, I would actually return the id of the new project (so you could provide a link for the newly created item or something like that), but i digress...

Here is a snippet for not only closing modals without page refresh but when pressing enter it submits modal and closes without refresh
I have it set up on my site where I can have multiple modals and some modals process data on submit and some don't. What I do is create a unique ID for each modal that does processing. For example in my webpage:
HTML (modal footer):
<div class="modal-footer form-footer"><br>
<span class="caption">
<button id="PreLoadOrders" class="btn btn-md green btn-right" type="button" disabled>Add to Cart <i class="fa fa-shopping-cart"></i></button>
<button id="ClrHist" class="btn btn-md red btn-right" data-dismiss="modal" data-original-title="" title="Return to Scan Order Entry" type="cancel">Cancel <i class="fa fa-close"></i></a>
</span>
</div>
jQUERY:
$(document).ready(function(){
// Allow enter key to trigger preloadorders form
$(document).keypress(function(e) {
if(e.which == 13) {
e.preventDefault();
if($(".trigger").is(".ok")) //custom validation dont copy
$("#PreLoadOrders").trigger("click");
else
return;
}
});
});
As you can see this submit performs processing which is why I have this jQuery for this modal. Now let's say I have another modal within this webpage but no processing is performed and since one modal is open at a time I put another $(document).ready() in a global php/js script that all pages get and I give the modal's close button a class called: ".modal-close":
HTML:
<div class="modal-footer caption">
<button type="submit" class="modal-close btn default" data-dismiss="modal" aria-hidden="true">Close</button>
</div>
jQuery (include global.inc):
$(document).ready(function(){
// Allow enter key to trigger a particular class button
$(document).keypress(function(e) {
if(e.which == 13) {
if($(".modal").is(":visible")){
$(".modal:visible").find(".modal-close").trigger('click');
}
}
});
});
Now you should get no page refreshes on any of your modals if u follow these steps.