Inserting class of clicked element and ID of parent into another image - javascript

I'm a JavaScript novice and I'm having some difficulty getting my code to work. I've set up a function that pulls in variables based on element classes and IDs and executes it onclick.
<div id="holder">
<img id="wallImg" src="/testpath/selwall/nopaint.jpg">
</div>
<div id="options">
<ul id="selWall">
<li class="bluepaint" onclick="printStuff()"><strong>Blue</strong></li>
<li class="redpaint" onclick="printStuff()"><strong>Red</strong></li>
<li class="greenpaint" onclick="printStuff()"><strong>Green</strong></li>
</ul>
</div>
<script type="text/javascript">
function printStuff() {
var imgCategory = srcElement.parentNode;
var imgClass = srcElement.className;
document.getElementById("wallImg").src="http://testurl.co.uk/media/gbu0/" + imgCategory + ImgClass + ".png";
}
</script>
The user is supposed to be able to select their paint colour from a selection of swatches (the ul#selWall li elements) and the JS will change the source of a particular image ID on the page (in this case, img#wallImg) with the clicked element's class and clicked element's parent element ID.
Eventually I want to be able to expand this script to use the ul id as a URL parameter name and the paint type (i.e. testurl.com/paint-selection&selWall=bluepaint&selDoor=greenpaint.) As far as I know, JQuery is unable to append URLs so I'd rather stick with plain JavaScript.

You're saying you want to stick with javascript because you don't think jQuery can append URLs. This is not a real reason to just entirely ignore it. JQuery IS javascript, it's just a library. This means that you can just use vanilla javascript whenever you want it, for example, when you want to change the URL.
Now for your desired functionality. You can use the keyword this in your inline click event registrator (i.e. onclick="printstuff()"). Passing the this variable will allow you to use the clicked element in the click handler. So change onclick="printStuff()" to onclick="printStuff(this)". Now in your function you can just use this instead of srcElement, and make sense.
OR INSTEAD USE JQUERY LIKE THE REST OF THE WORLD
$(document).ready(function(event){
$("#selwall).children("li").on("click", function(event) {
event.preventDefault();
var category = "sellwall"; //probably want to store this into a data-category arrtibute somewhere (maybe in the id=sellwall ul)
var imgClass = $(this).attr('class'); //preferably use data-img_id or something too (i.e. dont use classes and id's to store data you need somewhere else).
$("#wallImg").attr('src', <url> with imgClass and category>);
});
})
So I'd recommend using jQuery (since you're a javascript novice too, dont learn bad stuff, just learn how to program well right away) and using the data-attribute paradigm, look it up on the internet. Use it to store the URL parts you want to use.

Made some changes to your script to make script work and get the parent id and class of the current element.
function printStuff(srcElement) {
var imgCategory = srcElement.parentNode;
var imgClass = srcElement.className;
document.getElementById("wallImg").src="http://testurl.co.uk/media/gbu0/" + imgCategory.getAttribute('id') + imgClass + ".png";
alert(document.getElementById("wallImg").src);
var url = 'testurl.com/paint-selection&selWall='+imgClass+'&selDoor='+ imgCategory.getAttribute('id');
alert(url);
}
<div id="holder">
<img id="wallImg" src="/testpath/selwall/nopaint.jpg">
</div>
<div id="options">
<ul id="selWall">
<li class="bluepaint" onclick="printStuff(this)"><strong>Blue</strong></li>
<li class="redpaint" onclick="printStuff(this)"><strong>Red</strong></li>
<li class="greenpaint" onclick="printStuff(this)"><strong>Green</strong></li>
</ul>
</div>

Related

dynamically changing a div ID and other element's ID within the div

this is the div im trying to copy
{%for i in current_user.posts%}
<div class = "own_posts" id = "{{'id_' + i.id|string}}">
<img src = "{{url_for('static',filename='user_prof_pic/' + current_user.prof_pic)}}">
{{current_user.first_name}}
<p>{{i.post}}</p>
<div class ="like_comment">
<ul>
<li>like</li>
<li>comment</li>
</ul>
</div>
<form class ="comment_form">
<input type="text" action = "#" name = "comment_box" class ="comment_box" id = "{{'id_' +i.id|string}}">
<input type="submit" value="comment" class ="submit" id = "{{'id_' + i.id|string}}">
</form>
</div>
{%endfor%}
so far I've been successful at prepending it and changing the newly prepended div's ID using jquery like this.
var count = 4
$(".submit").click(function(event){
event.preventDefault()
var id = $(this).attr("id")
var comment = $(".comment_box#" + id).val()
console.log(count)
count++
$.ajax({
type:"POST",
url:"#",//"{{url_for('main.ProfilePage',user = current_user.first_name)}}",
data: JSON.stringify({"comments":comment}),
contentType:"application/json;charset=UTF-8"
});
var div_copy = $(".own_posts#id_2").clone()
var div_copy2 = div_copy.attr("id","id_" + count)
$("#own_stream").prepend(div_copy2)
});
however the form ID within the prepended div still contains the ID of the div it was cloned from. to clarify
var div_copy = $(".own_posts#id_2").clone() the form in this div contains an id of id_2 so the newly prepended div's form id is still id_2
I changed the prepended div's ID doing this:
var div_copy = $(".own_posts#id_2").clone()
var div_copy2 = div_copy.attr("id","id_" + count)
$("#own_stream").prepend(div_copy2)
but I don't know how to access the form within this newly cloned div and change it's form ID.
how do we achieve this?
also am I doing this right? Im trying to learn web development and wan't to understand how sites like facebook,twitter etc. are showing your newly posted statuses/tweets into the page without refreshing it.
is what I'm doing the gist of how that works? if not
shed some light on a newbie
also this is just a test to practice the concepts
If all you are attempting to do is retrieve the form element using jQuery, based on your source, you have multiple options.
var form = $(".own_posts#id_2 > form");
/* or */
var form = $(".own_posts#id_2 > .comment_form");
I don't normally suggest the direct descendant method because if your genealogy changes in the future, it will fail. You are using templates so intuitively I see future changes to it a possibility. Using a unique identifier or known singular class and searching the entire div chain makes more sense to me.
var form = $(".own_posts#id_2 .comment_form");
/* or */
var form = $(".own_posts#id_2").find(".comment_form");
Those two options should be roughly equivalent for your purpose and can use either.
Also I would be careful with non-unique ids. You may get away with it by only searching smaller scoping chains, but you're only supposed to have one on the page. This is why most functions that retrieve by id will return only the first object found, rather than a collection.
I don't know how you're using the ids, but perhaps something like id="{{'posts_' + i.id|string}}" and so on to utilize unique prefixes.

how to use html script template correctly

I have to generate some li element automatically and the way I was doing it it through a function that return text inside a loop, something like this:
function getLi(data) {
return '<li>' + data + '</li>';
}
then I found a better way to do it by writing html inside a div:
<div style="display:none;" id="Template">
<li id="value"></li>
</div>
and then I would change the id and value get the html and reset the element to original state:
var element = $("#value");
element.html(data);
element.attr('id', getNewId());
var htmlText = $("#Template").html();
element.html('');
element.attr('id', 'value');
return htmlText;
then I was reading on script template
and I figured this could be a better way of doing it,
However apply the previous code didn't work as the inner elements didn't exist according to this article
so how can I apply this?
EDIT:
I put inside a ul tag, I use this method to get the items dynamically
EDIT2:
<li>
<a href="#" >
<span>
<span>
some text
</span>
</span>
</li>
this isn't necessarily what I have but something along the way
Edit3:
my ul does not exist orgialy it's generated dynamically
I insist this is not a duplicate I want to know how to use a template with some dynamic variables
You could do the following way. It's clean, reusable and readable.
//A function that would return an item object
function buildItem(content, id) {
return $("<li/>", {
id: id,
html: content
});
}
In your loop, you could do the following. Do not append each LI inside the loop as DOM manipulation is costly. Hence, generate each item and stack up an object like below.
var $items = $();
// loop begin
var contents = ['<span><span>', data, '</span></span>'].join('');
var $item = buildItem(contents, getNewId());
$items.add($item);
// loop end
Just outside the loop. append those generated LIs to the desired UL, like below.
$("ul").append($items);
This is what I'd do and I am sure there are many better ways. Hope that helps.
One option is to upgrade to a modern JavaScript framework like AngularJS and then you could do it in one line using ng-repeat.
This would serve your purpose and make you more money as a developer.
If you're going to repeat this, use a templating system. Like {{ mustache }} or Handlebars.js.
If not, you can do this.
<ul>
<li class="hidden"></li>
</ul>
And in Javascript
$('ul .hidden').clone().removeClass('hidden').appendTo('ul');
And CSS, of course
.hidden { display:none }
Try this...
function getLi(data,ID) {
return $('<li id = "'+ ID + '">' + data + '</li>');
}
It returns javascript objest of Li..and you append it where ever you need.
what you need is using jquery templates, in the bellow link you can use good one which I'm using.
you create your template and prepare you JASON object of data.
after that every thing will be ready in one function call, more details in this link.
jquery.tmpl
hope this helps you and any one come to here in future..

Extract div data from HTML raw DIV text via JS

I'm trying to extract data from a JS function that only renders an element's HTML - and I need the element's ID or class.
Example:
JS Element Value:
x = '<div class="active introjs-showElement introjs-relativePosition" id="myId">Toate (75)</div>';
I need to do get the element's id or class (in this case the id would be myId).
Is there any way to do this? Strip the tags or extract the text via strstr?
Thank you
The easiest thing to do would be to grab the jQuery object of the string you have:
$(x);
Now you have access to all the jQuery extensions on it to allow you to get/set what you need:
$(x).attr('id'); // == 'myId'
NOTE: This is obviously based on the assumption you have jQuery to use. If you don't, then the second part of my answer is - get jQuery, it's designed to make operations like these very easy and tackle compatibility issues where it can too
You may want to take a look at this:
var div = document.createElement('div');
div.innerHTML = '<div class="active introjs-showElement introjs-relativePosition" id="myId">Toate (75)</div>';
console.log(div.firstChild.className);
console.log(div.firstChild.id);

Getting HTML content using jQuery on click

I've got a simple application that requires a DIV to be clicked, and in turn it shows another DIV which needs to have its content updated.
There are around 40 items that will need to be clickable and show the correct label for each.
Here is what I need to happen...
User clicks a DIV (drag_me)
Information box DIV is then shown (flavour_box)
the default word 'Ingredients' is swapped out with the content from the "flavour_descrip" div
Also update the 'choc_flavour' div with the name of the ingredient (choc_label)
The data comes from a database, so I'm unable to set individual ID's.
I had a similar issue with draggable's, but that was fixed, and I've tried doign somethign similar to no avail.
Here is the clickable DIV (flavour_descrip is set as hidden in the CSS)
<li class="drag_me">
<div>
<img src="RASPBERRY.png" />
</div>
<div class="choc_label">
Raspberries
</div>
<div class="flavour_descrip">
Our description will appear here for the DB
</div>
</li>
Here is the HTML for the popup box...
<div id="flavour_box">
<p class"flavour_description">Ingredients</p>
<div class="flavour_add">Add To Mixing Bowl</div>
</div>
Here is the jQuery snippet for the click (i've commented out the code I had started to rejig, but essentially I need to change the draggable.find to something that will work!)
$(".drag_me").click(function () {
//var htmlString = ui.draggable.find('.choc_label').html();
//$('.choc2_flavour').text(htmlString);
// update the description of the item
//var htmlString = ui.draggable.find('.flavour_descrip').html();
//$('.flavour_description').text(htmlString);
// on click of jar make box pop
$("#flavour_box").toggleClass("visible");
});
Any ideas how I can achieve this?
Added extra question
Now I've had my problem resolved, I need to perform one more task.
Inside the div that gets the details passed using "this", I need to be able to pass one more items to a different piece of script.
The DIV 'flavour_add' is clickable and will need to grab the flavour name to use to update some bits on screen and update a URL on the fly.
<div id="flavour_box">
<p class="flavour_name_label">Label</p>
<p class="flavour_description">Ingredients</p>
<div class="flavour_add">Add To Mixing Bowl</div>
</div>
This is the jQuery I have, but using "this" doesn't seem to work
$(".flavour_add").click(function () {
// hide the ingredient box
$("#flavour_box").toggleClass("hidden");
// show the continue box
$("#added_box").toggleClass("visible");
// get the flavour name
var flavourLabel = $(this).find('.flavour_name_label').text();
// update flavour URL
var _href = $("a.to_step_3").attr("href");
$("a.to_step_3").attr("href", _href + '&flavour=' + flavourLabel);
//$("a.to_step_3").attr("href", _href + '&flavour=TestFromAdd');
// update the mixing bowl list with the ingredient
$('.choc2_flavour').text(flavourLabel);
});
Use $(this) to get the reference to the clicked element:
$(".drag_me").click(function () {
var txt = $(this).find('.choc_label').text();
$("#flavour_box > .flavour_descrip").text(txt);
$("#flavour_box").toggleClass("visible");
});
Besides, there was a "typo" in your html code, replace:
<p class"flavour_description">Ingredients</p>
By:
<p class="flavour_description">Ingredients</p>
You can easily achieve this using jQuery.
$(".drag_me").click(function () {
$('.flavour_description').text($('.flavour_descrip').html());
// on click of jar make box pop
$("#flavour_box").toggleClass("visible");
});
I cannot seem to be able to find the divs for step: 4. Also update the 'choc_flavour' div with the name of the ingredient (choc_label)
I will assume that you mean 'flavour_add' in which case the code should look like this:
$('.flavour_add').text($('.choc_label').html());
Try this:
$(document).ready(function() {
var $flavourBox = $('#flavour_box');
var $flavourDesc = $flavourBox.children('.flavour_description');
var $chocFlavour = $flavourBox.children('.choc_flavour');
$('.drag_me').on('click', function() {
var $this = $(this);
$flavourDesc.html($this.children('.flavour_descrip').html());
$chocFlavour.html($this.children('.choc_label').html());
$flavourBox.addClass('visible'); //toggleClass will remove the class if it is there
});
});
get the text by using "this" (the actual clicked element) and then get the child flavour_descrip div
$(".drag_me").click(function () {
$("#flavour_box").show();
$('.flavour_description').text($(this).find('.flavour_descrip').text());
});
then show the flavour_box div and set the value of the div with the flavour_description class

Writing to a non-unique div with Javascript

I'm building a multi-feed RSS reader for school.
aList is the div that encompasses each individual feed (the amount of feeds will fluctuate).
theTitle is the div that will be filled with the attribute of the current feed. Additionally, if clicked, it will load a list of attributes from the current feed into theContent.
I'm wondering how I can dynamically load the attributes into theContent when theTitle is clicked, since theContent and theTitle are going to be non-unique divs (I can't give them IDs).
Thanks for your help in advance,
-Andrew
document.getElementsByClassName('aList').getElementsByTagName('div')
You should look into jQuery selectors for that and other DOM Manipulation. Something like
$("div.theContent").attr("name", "value");
by using jquery, you may use code like the following:
$(".theTitle").bind("click", function(){
$el = $(this);
$el.parent().$(".theContent").load('ajax/content.php?news=' . $el.text());
});
this will make all your links clickable, an on click, update their corresponding content divs with the value of ajax/content.php?news=theTitle-value
Use a nice Javascript library such as Prototype or jQuery. Seems petty now, but these frameworks save you tons of time in the long run.
In both frameworks, you can select that div with:
$('div.theTitle')
With jQuery, you can do:
$('div.theTitle').click( function() {
var title = $(this).text();
var contentDiv = $(this).siblings('div.theContent');
// Do something with contentDiv and the title
} );
This will make every theTitle div have an onClick event that does something with its associated theContent div.
<div class="aList">
<div class="theTitle" onclick="fillContentBox(this)"></div>
<div class="theContent"></div>
</div>
And in your script ...
function fillContentBox(div) {
var theContentDiv = div.parentNode.getElementsByTagName("div")[1];
// statements that do things with theContentDiv
}
You have to be able to determine which element you want to update if you don't want to update more than one. If the elements are grouped inside something else that does have an "id" value, you can take advantage of that.

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