We Keep Coding

How to capture clicked element using $(this) inside of a vue(js) instance

I am reworking an old app of mine and I am having issues with dom manipulation and basic selections within a vue instance.
Essentially I have information in a database that I load in via ajax.
Each record in the db has 2 sections. The header tab(title, time, date etc) and the body of the record(notes, ideas, etc)
When loaded, the header shows normally to the user but if they want to see what that note contains, they have to click on the header for the bottom to appear.
consider the following html:
<vuejs for loop>
<div v-bind:id='item._id' class="tabW" v-on:click="blueTabClick" >
<div class="blueTabMainColor">
<!-- header stuff here -->
</div>
<div class="notesOpenedW">
<!-- interior informaton here, HIDDEN BY CSS -->
</div>
</div>
<vuejs for loop ender>
This HTML is essentially inside a Vue for/loop directive, and generates however many "tabs(tabW)" as needed based on how much info I have in the DB
All I want the user to do is to be able to click whichever tab(tabW) they want information on, and for the notes show underneath(notesOpenedW).
I stripped my entire app and js and tried to keep it as simple a test as possible and even with the below, I still can't get anything.
here is my JS(JQ):
$(document).ready(function(evt){
$(".blueTabMainColor").click(function(){
$(this).next(".notesOpenedW").fadeToggle();
});
});
With this basic code, when I put it inside a Vue instance, via:
methods: {
blueTabClick: function (evt) {
evt.preventDefault();
$(".blueTabMainColor").click(function(){
//alert("you clicked me");
$(this).next(".notesOpenedW").fadeToggle();
});
}
}
It doesn't work, but if I take it out of the Vue instance, it works just fine.
how can I get this to work? or am I going about it the wrong way?

Vue will not cohabit happily with JQuery. You're $(this) will not work because you're not even in the document at that point, you're in pure js, virtual DOM, another universe. Then, if it did, the event listener you call may not exist. You will need to fundamentally transition this code to Vue if you want it to work, I fear.

You can achieve this by setting a ref on "notesOpenedW".
https://v2.vuejs.org/v2/api/#ref
I would strongly recommend to wrap this behaviour in a dedicated component
That would have the following content :
<div class="tabW" v-on:click="blueTabClick" >
<div class="blueTabMainColor">
<!-- header stuff here -->
</div>
<div class="notesOpenedW" ref="notesToggleDiv">
<!-- interior informaton here, HIDDEN BY CSS -->
</div>
</div>
And the method :
methods: {
blueTabClick: function () {
$(this.$refs.notesToggleDiv).fadeToggle();
}
}
Be aware that when using Vue, manipulating directly the dom is usually a bad idea.
As i showed you, it is possible to use jQuery with Vue if you absolutely need it (or cannot afford to rework more deeply your application).
Edit : Just found this article that i think would help you a lot :
https://www.smashingmagazine.com/2018/02/jquery-vue-javascript/?utm_campaign=Revue%20newsletter&utm_medium=Newsletter&utm_source=Vue.js%20Developers

jQuery UI Dialog: Dialog Element Disappearing from the DOM

I'm working on a project and I am attempting to create a modal dialog "pop-up" to capture data in a form. I haven't worked with jQuery UI's Dialog widget previously, but I've worked with others and it seemed straight forward.
I created the following very simple code snippet to test as I went along:
<div class="app-email">
<div>
<a href="#"
class="app-email-opener">
Click to add or edit your e-mail settings.
</a>
</div>
<div class="app-email-modal">
Oh, Hai.
</div>
</div>
$('.content').on({
click: function () {
console.log('I was totes clicked.');
var parent = $(this).parents('.app-email');
console.log(parent);
var target = parent.find('.app-email-modal');
console.log(target);
$(target).dialog('open');
}
}, '.app-email-opener');
$('.app-email-modal').dialog({
autoOpen: false,
modal: true,
show: false
});
For reference: the class 'content' is a higher level block to catch delegated events without having to go all the way up the DOM.
The issue I'm running into is that the div with class="app-email-modal" seems to flash onto the page and then disappear from the DOM completely. jQuery, therefore, isn't able to find it and do anything because at that point it simply doesn't exist.
The overall project is in ASP.NET MVC 4, using Visual Studio 2013.
Any information would be greatly appreciated.

So, finally discovered what's happening via this previously answered question:
Jquery Dialog - div disappears after initialization
//EDIT
For any possible future usefuless -
What was happening was that jQuery UI will move any DOM elements specified as Dialogs to the bottom of the page, rather than keep them in the location specified in the HTML markup. So, in my case, I was looking for things by class, but only within the scope of the app-email-openers parent app-email div.
To remedy this, I used templating (in my case, Razor) to add unique ids to each app-email-modal div, and added a data- attribute to associate the link with the specific unique id. This way they jQuery UI can move the elements as it sees fit, but there still easily accessible.
//END EDIT
I feel like that functionality should be better spelled out in the documentation. Even their own example doesn't operate like this.
Corollary: I attempted to use the appendTo option to have the DOM elements not be shifted to the bottom of the page, but they're still moved to the bottom. So, there's that.

reccommended way to output HTML from JavaScript

I know this has probably been asked before, but here goes: I have a web application that needs to generate modal dialogs. alert, confirm, and prompt are too simple and ugly, and that modal window function...it's a long story. I can't use it. So, I'm going to create the modal box using DOM functions and CSS. However, I need to put quite a lot of content into the dialog, and I'm wondering what the best way to do this is. Putting the HTML into a string and using innerHTML is unwieldy. I could use the DOM, but that's annoying and takes too much time to code. I know I can use a script with a weird type tag (something like x-random/x-htmlstuff) and then copy it's content to the innerHTML, but is there a better, more "official" way to do this?

if the layout of the modals are static, just put them into the HTML of the page. Use CSS to set them to display: none when the page is displayed normally. When you want to display the model, use
document.getElementById('modal-id').style.display = 'block';

I've heard that some people use this solution:
<script type="text/html" id="popup_html">
html...
</script>
(of course, you should make it invisible)
But, most likely, if you're trying to write a lot of HTML from javascript, then you should retrace and think if there's a better way.
If you're using the same div multiple times, you should just create it in the HTML page, and display it when needed
if you're creating a new element - see if you can use the document.createElement and appendChild methods (assuming there aren't many nodes involved)
if neither apply - retrace. For large projects, maybe object-oriented javascript can help.

There's no magical way that I'm aware of. I usually just use innerHTML and write the HTML out in a well formatting from such as:
box.innerHTML = "<div id='boxChild'>\n" +
" <p>Put whatever content here</p>\n" +
"</div>";
The \n make it so if you view your code, it will be well formatted, and no one long string once the JS writes it.

A way to do this, is to generate the popups within the html and show or hide them when you need, like this:
<div class="myPopup">
<div class="pop-message msg-01">This a pre generated alert with the id: <span class="dynamic-field-01"></span></div>
<div class="pop-message msg-02">This another pre generated alert with the id: <span class="dynamic-field-02"></span></div>
<div class="pop-message msg-03">...</div>
</div>
.pop-message {
display: none;
}
Now while user navigates the page, you are going to hide and show the .pop-message's while replacing those .dynamic-field's if needed.

I would suggest having the HTML for your modal content in separate files, and then loading it asynchronously when you need it to popup the modal.
partials/modal.html
<div class="content">My modal content</div>
main.js
var modalContent = null;
function _fillModal() {
modal.innerHTML = modalContent; // something like this
}
function openModal() {
if (!modalContent) {
// XMLHttpRequest, which populates the modalContent variable
// and in the callback, calls _fillModal()
}
// If already filled, just call
_fillModal()
}
If you want the content to be dynamic, make modal.html a template, and use a JS template library (for example http://underscorejs.org/#template), or write a simple RegExp replace yourself.

I'd suggest loading it with innerHTML or using jQuery to simplify things, but if you need
a modal window, could you use the jQuery UI modal dialog, shown here?
If you have the content loaded in divs in your HTML, and have them have css display:none;, and then show them with
document.getElementById("unshown-div").style.display="block";
If you can use jQuery, a modal box could be done with
<div id="modal" style="display:hidden">
Here is a modal dialog bbox
</div>
and your script:
$("#dialog").dialog();
Whatever you do, just don't use document.write()

sharepoint 2010. Include javascript in code for all item display forms

I have javascript which can hide empty fields from sharepoint display form.
http://sharepointjavascript.wordpress.com/2009/10/15/hide-empty-rows-in-dispform/
I need to add programmatically this javascript to all display forms.
I dont know how to do it. Any ideas?

.each loops through all elements which matches a specific selector. If the code below is not sufficient, change the selector ("td.ms-formbody") such that your desired elements are matched.
$("td.ms-formbody").each(function(){ /* Should walk through all elements */
var val = $(this).text().replace(/\s|\xA0/g,'');
if($(this).parents().html().match('FieldName="#H#')==null){
if(val.length==0){
$(this).parents('tr:first').hide();
}
}
});
If you're still stuck, provide your HTML code, so that a more specific answer can be offered.

You can add a custom template file, overriding the ordinary DefaultTemplates.ascx (under ControlTemplates).
Create _NewTemplates.ascx file (empty). It should go under ControlTemplates as well
Copy all the Register stuff from the original ASCX
Add the ListForm template copied from DefaultTemplates.ascx (you might need to add a couple more template, depending on the list types you want to support)
Now edit the rendering template to add your JS
<SharePoint:RenderingTemplate ID="ListForm" runat="server"">
<Template>
--> add your code here
<script language="javascript">add functions or hook up enternal JS file</script>
--> continue original markup from this point
Save the file and run IISRESET, that's it

Html Helpers generates ID from model properties. How do I target 1 particular element with JavaScript and CSS if many elements have the same ID?

As it's recommended, Javascript must be kept in a physically separate file (to be unobtrusive). So how do I access a particular element in particular page? should I detect those elements by id? that would mean 2 elements can't have the same id even if they are not located in the same page.
Well, for instance, using the Html helpers methods generates element's name + id from the model's properties. If I use the same model in several pages, many elements will have the same id. How can I target them in different pages. By the way, CSS work the same way.
EDIT
Let's say I've this
<% = Html.TextBoxFor(x => x.FirstName)%>
It will generates
<input type = "Text" name = "FirstName" id = "FirstName"/>
Let's say I've this textbox in 2 differen pages. If want, for instance, to disable the textbox located in page A, how do I do it knowing they are two of them in 2 different pages. How do I discriminate them from my external javascript file?
Thanks for helping

I suggest that for each page the uses the same model, you create a wrapper div
<div class="pageA">
// the model stuff here
<% = Html.TextBoxFor(x => x.FirstName)%>
</div>
<div class="pageB">
// the model stuff here
<% = Html.TextBoxFor(x => x.FirstName)%>
</div>
and then use Jquery selectors to get the correct element $(".pageA input[name='FirstName']") (not sure if this syntax is correct).

You cannot have multiple elements on the page with the same id. That isn't valid HTML.
So when you use the same HTML helper multiple times, you need to pass different names:
<%: Html.TextBox("Foo", Model.Foo) %>
<%: Html.TextBox("Bar", Model.Bar) %>

Correct me if i'm wrong, but are you saying, you have some elements with the same id, on multiple pages, that you want to attach different behaviour to? If so then this could help you out. if not, then what Craig said.
You can use more specific selectors, or give your selectors context
have a look at the documentations here: http://api.jquery.com/jQuery/
under this header:
jQuery( selector, [ context ] )
it explains a bit about selects and context. you should be able to use this and some creative page building to target the right element with your jQuery.

So you have two files, each with a text field with the id "FirstName". When you're script runs on Page A you want to disable the field, but not when your script runs on Page B.
Is the structure of the two pages identical? I suspect not if you're handling these fields differently. Use the context to your advantage. Like if the one on Page A is in a div with id "thisDiv" and the other is in a div with id "thatDiv" you could document.getElementById('thisDiv'). If you get an element then disable the field, if not do nothing.
If you want a more specific answer you're going to have to give us more context.

Well JavaScript may be kept in a separate file or not, but it is definitely included as part of the HTML send to the browser for a particular page. I Hope I've understood your question, but, generally if you have you JavaScript code in a file, lets say utils.js then in your html generated should include (probably within the <head> tag):
<script type="text/javascript" src="/path/to/utils.js"></script>
The script get included in the page, and when the browser encounters this, it loads and then runs the script, for that page. Therefore, it is not important what the ids for elements on different pages are.
Does that make sense, or have I completely misunderstood your question?
Update:
Ok, so based on your comments, I think I understand. You have
//Page 1
//When loaded, this input should flash blue via javascript for example
<input id="firstName" .../>
And
//Page 2
//When loaded, this input has some other fancy effect/behaviour
<input id="firstName" .../>
Well in this case, as far as I see, there are only 2 types of answers. Have two seperate external js files, one per page and this way you can change to your hearts content ...OR... have some sort of hidden field in your page that tells your script what page it is looking at (this seems hacky)
<input type="hidden" value="page1"/> //etc..