I'm trying to make a dynamic form with AngularJS and JavaScript. The objective is to add how many inputs the user need and transform all those inputs in AngularJS variables that print it on body. So I got that code:
$(function(){
var number = 1;
$('a.add').click(function(e){
e.preventDefault();
$('#this_div_contains_settings').append('<input type="text" name="example'+number+'" ng-model="example'+number+'" placeholder="Anything">');
number++;
});
$('#this_div_contains_settings').on('click','a.design_button', function(e){
e.preventDefault();
$(this).parent().remove();
});
});
This function add a INPUT on my DIV with the different ng-model every time it run.
The problem is, it just work's if the {{example1}} is already on my BODY, if I add it later with another function, it just doesn't work.
I'm new with AngularJS, so I didn't understand if I need to "refresh" the AngularJS everytime I add new variable or something like that.
Any help will be appreciated :)
Using jQuery is the wrong way to solve this problem. Instead, create an array inside of your controller that will hold the models for all of these inputs.
Depending on how you define/create your controllers, $scope may be replaced with this
$scope.examples = [];
Next, create a function that will add a new example to the array:
$scope.addExample = function () {
$scope.examples.push("");
}
Now, in your template, create the inputs using an ng-repeat:
<div id="this_div_contains_settings">
<input ng-repeat="example in examples" type="text" name="example" ng-model="example" placeholder="Anything">
</div>
and have your "add" button call your addExample function on click:
<a class="add" ng-click="addExample()">Add Example</a>
Finally, remove all of the code that was included in your question.
And for your .design_button that removes all the examples, that's easy too:
<a class="design_button" ng-click="examples = []">remove all examples!</a>
by that same concept, you could even remove the need for the addExample function, however i tend to keep logic in the controller (well, actually in the services, but that's another topic) anyway rather than putting it in the template.
Related
I want to update argument of ng-click of button but not able to do it please help me... my code is
in controller
$scope.trCategoryId = 0;
and setting up this value in other function like
$scope.setClick = function (CategoryId) {
$scope.trCategoryId = CategoryId;}
in html i have define bellow
<button ng-click="ActiveTag('step1',{{trCategoryId}},0)" id="btnrename">Create</button>
it is not calling up ActiveTag function
Glad my comment worked out for you, adding it below as a solution:
Angular related attributes prefaced with ng- auto evaulate so
{{trCategoryId}} within any ng- is a no-no. It evaluates variable names against scope inside automatically, no need for the {{}}.
<button ng-click="ActiveTag('step1',trCategoryId,0)" id="btnrename">Create</button>
I have a paragraph tag which i want to hide conditionally. I am unable to hide it.
This is demo code:
Fiddle demo
This is what i have tried- made one observable variable and assig:
var viewSellerBtnVisible = ko.observable(true);
viewSellerBtnVisible(false);
viewSellerBtnVisible(false) is conditional in the original code but even then its not getting hidden.
What should i do to hide this paragraph tag?
Working demo:
var viewSellerBtnVisible = ko.observable(true);
ko.applyBindings({ viewSellerBtnVisible: viewSellerBtnVisible }, document.getElementById("txtRecommendationHeading"));
viewSellerBtnVisible(false);
<script src="https://cdnjs.cloudflare.com/ajax/libs/knockout/3.2.0/knockout-min.js"></script>
<h3 class="">People also liked...</h3>
<p id="txtRecommendationHeading" data-bind="visible: viewSellerBtnVisible" class="font11">View seller details in <strong>one click</strong></p>
In your code:
ko.applyBindings(viewSellerBtnVisible, document.getElementById("txtRecommendationHeading"));
var viewSellerBtnVisible = ko.observable(true);
viewSellerBtnVisible(false);
The model should be a JavaScript object, mapping names to values. viewSellerBtnVisible in your code is a value; Knockout cannot know what its name would be just from that.
You also apply bindings using a variable name that has not yet been defined. At the point where you applyBindings, viewSellerBtnVisible is not even an observable, it is undefined. Since parameters are passed by object sharing, and not by reference, the binding does not become an observable later. You need to have a proper sequence of instructions.
Finally, your Fiddle doesn't have Knockout loaded. When playing with Fiddle, you should add libraries you're using under "External resources".
I am trying to make an independently working div which has a form inside of it.
I use jquery to calculate the price of a product depending of the user's selections in the form. However the user is able to add multiple items in his 'cart' so the form is duplicated to another div. The problem is that the calculation pattern can't separate these two divs and the calculation will be incorrect. The form is also interactive so it will be generated by the user's input. This is really complex set and renaming every variable by the 'product number' doesn't sound really efficient to me.
I'm kind of stuck here and i don't really know how to solve this problem. I had an idea that what if I put an iframe inside of the div and load my form and its calculation script inside of it, and then use post command to transfer the price of the product to the 'main page' to calculate the total price of all of the products the user wanted.
However it seems that jQuery scripts doesn't work independently inside of these iframes, they still have connection so they broke each other.
i will appreciate any kind of suggestions and help to solve this matter, thank you!
here's the code so far
Heres the body
var productNumber = 1;
<div id="div_structure">
</div>
<button id="newProduct" >Add new product</button><br \>
add new item
<!-- language: lang-javascript -->
$('#newProduct').click(function ()
{
$('<div id="productNo'+productNumber+'">')
.appendTo('#div_structure')
.html('<label onclick="$(\'#div_productNo'+productNumber+'\').slideToggle()">Product '+productNumber +' </label>'+
'<button onclick="$(\'#product'+productNumber+'\').remove()">Remove</button>');
$('<div id="div_product'+productNumber+'" style="display: none;">').appendTo('#product'+productNumber+'');
$('<iframe src="productform.html" seamless frameborder="0" crolling="no" height="600" width="1000">').appendTo('#div_product'+productNumber+'');
productNumber++;
});
it also has a function that allows the user to remove the inserted div.
Here's just few lines from the productform
$(document).ready(function()
{
$('#productCalculation').change(function ()
{
shape = $('input[name=productShape]:checked', '#productCalculation').val();
alert(shape);
});
});
<form id="productCalculation">
<div id="div_productShape" class="product1">
<h1>Select the shape of the product</h1>
<input type="radio" name="productShape" value="r1">R1</input><br \>
<input type="radio" name="productShape" value="r2">R2</input><br \>
<input type="radio" name="productShape" value="r3">R3</input><br \>
</div>
.
.
.
</form>
I translated all of the variables so they may not function correctly since i didn't test the translated version. So the problem is, if i try to make selections in the second generated div it wont even alert() the selected variable
There are two problems with this code: You say somewhere "I translated all of the variables so they may not function correctly since i didn't test the translated version. So the problem is, if i try to make selections in the second generated div it wont even alert() the selected variable". This is because event handlers are attached to elements that are in the DOM at that specific moment. To get it to work for all elements, use event delegation:
$(document).ready(function()
{
$(document).on( 'change', '#productCalculation', function ()
{
shape = $('input[name=productShape]:checked', '#productCalculation').val();
alert(shape);
});
});
Your other question is "My question in a nutshell: Is there a way to restrict jquery to function only in certain div even though i use the same variable names in the second div ". You can use the this variable to access the element the click was invoked on. From this element you can traverse the DOM if needed, for example with .parent().
$('div').on( 'change', function( e ) {
console.log( $(this).val() );
} );
To summarise briefly what I'm trying to do: I'm providing the facility for a user to view a gallery of thumbnail images, each with a corresponding download link. When the download link is clicked, I present the user with a confirmation div, and assuming the user clicks 'agree', they'll be able to proceed with the download of the full size version of the thumbnail.
To do this, I'm using a repeater to generate the thumbnails. I'm creating a unique id for each link within the 'ItemCreated' event, along with a unique hidden field that stores the relative path for the destination file for that thumbnail.
When the user clicks on the 'Download' link for the appropriate thumbnail, my code should select the 'agree' link, and update it's target path with the hidden field value of the item that was clicked (I hope that made sense?). This basically means whenever a 'Download' button is clicked, the 'agree' link is updated to direct you to the correct file.
The problem that I'm having however is that my 'agree' link never gets updated - it seems to point to the same file for every thumbnail.
Here's a snippet of the rendered thumbnail list:
<div class="download-listing">
<div class="download">
<img src="/img/thumb0.jpg" alt="" />
<div id="downloadLink0" class="dl">Download</div>
<input type="hidden" id="hf0" value="/GetImage.ashx?path=/img/0.jpg" class="hf" />
</div>
<div class="download">
<img src="/img/thumb1.jpg" alt="" />
<div id="downloadLink1" class="dl">Download</div>
<input type="hidden" id="hf1" value="/GetImage.ashx?path=/img/1.jpg" class="hf" />
</div>
<div class="download">
<img src="/img/thumb2.jpg" alt="" />
<div id="downloadLink2" class="dl">Download</div>
<input type="hidden" id="hf2" value="/GetImage.ashx?path=/img/2.jpg" class="hf" />
</div>
</div>
<input id="count" type="hidden" value="3" />
<!-- Hidden popup -->
<div id="popup">
<p><a id="close" class="bClose action">I disagree</a><a id="file-link" class="action" href="#">I agree</a></p>
</div>
Hopefully you can see from the above code that I'm trying to extract the hidden field path from the download that's clicked, and then update the #file-link 'href' with this value.
The Javascript/Jquery I'm using (and this is where the problem seems to be) is the following:
<script type="text/javascript">
$(document).ready(function () {
for (var i = 0; i < $("#count").val(); i++) {
var index = i;
$("#downloadLink" + index).click(function () {
$('#file-link').attr('href', $('#hf' + index).val());
$('#popup').bPopup();
});
}
});
</script>
However, none of this is working! What seems to be happening is that every download link points to the same path - the last one in the list. I can't figure out where I'm going wrong. Is there something obvious I'm missing?
I appreciate any help given!
Thanks
Isn't it easier to do this:
$(function(){
$(".download .dl").click(function(){
$('#file-link').attr('href', $(this).next("input").val());
$('#popup').bPopup();
});
});
Try Something like this...
$("div[id*='downloadLink']").click(function () {
$('#file-link').attr('href',$(this).siblings('img').attr('src'));
$('#popup').bPopup();
});
After a click on any download link, this code will pass the associated image href path to the file-link element.
here is the working fiddle
I'd recommend against using all those input fields. It just creates a bunch of unnecessary markup. Why not store the #count value simply in a JavaScript variable? And the inputs that contain the image paths could be removed as well. You could store that info in an attribute on each download link, named something like "data-path". For example:
<div id="downloadLink0" class="dl" data-path="/GetImage.ashx?path=/img/0.jpg">Download</div>
Now, going back to your original problem, the above markup would solve the issue quite easily:
$('.dl').click(function(){
$('#file-link').attr('href', $(this).attr('data-path')); //could also do $(this).data('path') if using jQuery 1.6 or later
$('#popup').bPopup();
});
Other people have already suggested different ways to achieve what you want, but nobody explained why your current code doesn't work.
The reason it currently doesn't work is because of how scope works in Javascript. There is no block scope* and so your index variable is defined once, and updated every time the loop runs, until in the end it has the maximum (last) value. Then whenever your event handler is run, index still has this value, and the last item will be used.
So, in JS, the easiest way to get a new scope is to use a closure. Here's an example adapted from your code:
$(document).ready(function () {
for (var i = 0; i < $("#count").val(); i++) {
var fn = (function(index) {
return function () {
$('#file-link').attr('href', $('#hf' + index).val());
$('#popup').bPopup();
};
})(i);
$("#downloadLink" + i).click(fn);
}
});
This is not as good a way to solve your actual problem as some of the other answers. However, it demonstrates the concept of creating a scope: you're calling a function that takes one parameter, index, for which you pass the loop iterator variable i. This means that the function inside it (which it returns) can now always access the value of this parameter. The inner function gets stored in fn, which then gets passed as the click handler.
If this looks really tricky, here's a more in-depth look at function and scope in Javascript.
*Note that proposed new versions of Javascript/Ecmascript may add block scoped variables. It is not currently implemented in a cross-browser fashion, however.
You should probably calculate it from the event source (#downloadLinkn), by getting n from the end of the string.
I have a script which dynamically adds rows to a form with default values:
$(document).ready(function() {
var defaults = {
'name[]': 'Name',
'email[]': 'Email',
'organisation[]': 'Organisation',
'position[]': 'Position'
};
var setDefaults = function(inputElements, removeDefault)
{
$(inputElements).each(function() {
if (removeDefault)
{
if ($(this).data('isDefault'))
{
$(this).val('')
.removeData('isDefault')
.removeClass('default_value');
}
}
else
{
var d = defaults[this.name];
if (d && d.length)
{
this.value = d;
$(this).data('isDefault', true)
.addClass('default_value');
}
}
});
};
setDefaults(jQuery('form[name=booking] input'));
$(".add").click(function() {
var x = $("form > p:first-child").clone(true).insertBefore("form > p:last-child");
setDefaults(x.find('input'));
return false;
});
$(".remove").click(function() {
$(this).parent().remove();
});
// Toggles
$('form[name=booking]').delegate('input', {
'focus': function() {
setDefaults(this, true);
},
'blur': function() {
if (!this.value.length) setDefaults(this);
}
});
});
For the following form:
<form method="post" name="booking" action="bookingengine.php">
<p><input type="text" name="name[]">
<input type="text" name="email[]">
<input type="text" name="organisation[]">
<input type="text" name="position[]">
<span class="remove">Remove</span></p>
<p><span class="add">Add person</span><br /><br /><input type="submit" name="submit" id="submit" value="Submit" class="submit-button" /></p>
</form>
I would now like to split the form into 2 sections, each of which can have rows added dynamically to it. The second section would only have spaces for name and email, so the form as a whole, before any additional rows are added, would look something like this:
But I'm not sure how to achieve this. Either I would create a separate form with a seperate script, and then would need to know how to submit the information from both forms together, or I would just have one form but would then need to work out how to add rows dynamically to each section.
Could someone help with this?
Thanks,
Nick
I've implemented this in a fully functional example here.
I cleaned up your code a little bit, but it's basically the same. The main addition is that I wrapped the inputs in a fieldset element (you could use a div just as well, but fieldset is the semantically correct element for grouping related input fields). Your 4-input section lives in one fieldset, and your 2-input section lives in another; the "Add Person" handler looks for the parent fieldset, clones the first child, and adds it into that fieldset. Conveniently, in your use case the defaults for the first fieldset are the same as those for the second fieldset, but it would be easy enough to set up multiple sets of defaults and pass them into the setDefaults function.
A few other changes to the code:
I split your setDefaults function into two different functions, setDefaults and removeDefaults - you weren't gaining anything by making them a single function, and splitting them makes the code more legible.
I used .delegate to assign the "Remove" handler - otherwise the "Remove" button wouldn't work for new input sets. I also created the "Remove" button with jQuery, rather than cloning it, because I assumed that it wouldn't make sense to include it for the first input set.
I used jQuery in a couple of places where you were using raw Javascript (e.g. getting and setting input values). I generally assume that jQuery is more reliable for cross-browser DOM access and manipulation, so if you're loading the library already there's rarely any point not using it for all but the simplest DOM functions.
I removed your .data calls, since you can get the same information by inspecting the class, and it's generally better to reduce complexity. It's possible that .hasClass('test') is slightly slower than .data('test'), but I don't think it should make any difference here.
Create one form. Put two divs inside of it. Have your script add/remove form elements to the appropriate div.
When you submit the form it should automatically submit all of the form elements in both divs since the divs are contained in the form.