I am trying to hide/show a class of elements in a form depending on a drop-down menu choice made by the user. See: http://jsfiddle.net/3FmHK/2/
I am new to js and have two problems, so maybe they are obvious, bear with me.
1) I am modifying by the div id, so only the first element changes (and not in this fiddle for some reason, but it does in the project). However I want all the elements of a class to modify and I haven't been able to make that work. So how do I modify the style="display" for an entire class, rather than a single element?
2) The remove does not work for newly added element, when the form is returned with values in the project, they are removable. Using firebug, the code looks identical for the GET return generated elements vs the user added elements, as far as I can tell. Why does the remove function not work for newly added elements?
I recommend using jQuery for this if you can. You can use the .on() feature to bind actions ot newly created elements and use the class selector to .hide() all classes then .show() the currently selected on by id.
It would look something like this:
jQuery(document).ready( function() {
jQuery(document).on('click', '.classname', function() {
jQuery('.' + jQuery(this).attr('class') ).hide();
jQuery(this).show();
// Or you can use the following to show a specific ID element.
//jQuery('#idtoshow').show();
)};
});
This will hide all elements with the class name. You will need to include the jQuery library before your script. Although I am only using show and hide here, you can use .remove() as long as you bind your action with .on and not just .click. You need .on to bind to newly created elements.
http://api.jquery.com/on/
Hope this helps.
Try:
$(this).parent('div').first().remove();
Related
I have implemented a user-generated keyword list for a project I'm working on, using jQueryUI autocomplete to suggest existing keywords.
On selecting the autocomplete suggestion, the returned string is added to the html of a div, as a child div.
I would like to add a removal function whereby the user can remove the child div if erroneously entered.
I've tried multiple suggested answers from Stackoverflow and elsewhere, but can't seem to get it working.
I've created a fiddle containing the pertinent elements.
The most logical solution to me was:
$('.keyword-entry').click(function(e){
var id = $(this).closest('div').prop('id');
$('#'+id).remove();
}
Though it would appear this doesn't work.
Whilst a solution to the problem would be very much appreciated to save my dwindling supply of coffee from running out this evening, I would also appreciate a rundown as to why I'm going wrong.
Thanks in advance.
Event delegation.
It's basically that you're attempting to attach an event to an DOM element that doesn't exist in the DOM at the time of load. Rewrite the .click() handler too:
$(document).on('click', '.trashYes', function () {
$(this).remove();
});
Fiddle: http://jsfiddle.net/6bBU4/
What it's doing is that, it's attaching the .click() event to the document (The top most DOM element) will travel down to find any new .trashYes, thus successfully executing the .remove(). This doesn't have to be bound to the document but to any DOM element within the document as well at load.
No need to get the id and then try and find it again, just do this...
$('<div id="'+id+'" class="keyword-entry" style="z-index:0">'+ui.item.value+' <--I want to remove this</div>')
.appendTo($('#keyword-list'))
.click(function(e){
$(this).remove();
});
when adding the keyword entry
I have this class called .m-active that is used multiple times throughout my HTML.
Basically what I want to do is remove all instances of that class when a user clicks on an image (which does not have the m-active class) and add the m-active class to that image.
For instance in a Backgrid row you might have a click handler as follows:
"click": function () {
this.$el.addClass('m-active');
}
But you also want to remove that class from any rows to which it was previously added, so that only one row at a time has the .m-active class
Does anyone know how this can be done in javascript/jquery?
With jQuery:
$('.m-active').removeClass('m-active');
Explanation:
Calling $('.m-active') selects all elements from the document that contain class m-active
Whatever you chain after this selector gets applied to all selected elements
Chaining the call with removeClass('m-active') removes class m-active from all of the selected elements
For documentation on this specific method, see: http://api.jquery.com/removeClass/
Getting grasp of the whole selector thing with jQuery is challenging at first, but once you get it, you see everything in very different light. I encourage you to take a look into some good jQuery tutorials. I personally recommend checking out Codeacademy's jQuery track: http://www.codecademy.com/tracks/jquery
all answers point to remove the class from the DOM element. But if you are asking to remove the element itself you can user .remove() jquery method
$('.m-active').remove();
JQuery Remove Docs
In plain JavaScript (no jquery):
for (elem of document.getElementsByClassName("m-active")) {
elem.classList.remove("m-active");
}
Jquery-:
$("class").removeClass("your class");
javascript-:
Set the class name to nothing when you want to remove class in javascript!!!
document.getElementById("your id").className = "";
or
element.classList.remove("class name");
Specifically addressing the code block added to strengthen the quality of the question, and borrowing from jsalonen:
"click": function () {
$('.m-active').removeClass('m-active');
this.$el.addClass('m-active');
}
so i implemented a bit of jQuery that basically toggles content via a slider that was activated by an <a> tag. now thinking about it id rather have the DIV thats holding the link be the link its self.
the jQuery that i am using is sitting in my head looks like this:
<script type="text/javascript">
function slideonlyone(thechosenone) {
$('.systems_detail').each(function(index) {
if ($(this).attr("id") == thechosenone) {
$(this).slideDown(200);
}
else {
$(this).slideUp(600);
}
});
}
</script>
i was using this as a index type box so there are several products when you click on the <a> tag that used to be an image* it would render a bit of content beneath it describing the products details:
<div class="system_box">
<h2>BEE Scorecard database</h2>
<p>________________</p>
</div>
the products details are wrapped in this div.
<div class="systems_detail" id="sms_box">
</div>
so when you click on what used to be a image* it would run the slideonlyone('div_id_name') function. the function above then first closes all the other divs with the class name 'system details' and then opens/slides the div with the id that was passed into the slideonlyone function. that way you can toggle products details and not have them all showing at once.
note i only kept the <a> tag to show you what was in there i will be getting rid of it.
note: i had an idea of just wrapping the whole div in an <a> tag but is that good practice?
So now what i am wondering is since you need JavaScript to run onclick on a div tag how do you write it so that it still runs my slideonlyone function?
Using obtrusive JavaScript (i.e. inline code) as in your example, you can attach the click event handler to the div element with the onclick attribute like so:
<div id="some-id" class="some-class" onclick="slideonlyone('sms_box');">
...
</div>
However, the best practice is unobtrusive JavaScript which you can easily achieve by using jQuery's on() method or its shorthand click(). For example:
$(document).ready( function() {
$('.some-class').on('click', slideonlyone('sms_box'));
// OR //
$('.some-class').click(slideonlyone('sms_box'));
});
Inside your handler function (e.g. slideonlyone() in this case) you can reference the element that triggered the event (e.g. the div in this case) with the $(this) object. For example, if you need its ID, you can access it with $(this).attr('id').
EDIT
After reading your comment to #fmsf below, I see you also need to dynamically reference the target element to be toggled. As #fmsf suggests, you can add this information to the div with a data-attribute like so:
<div id="some-id" class="some-class" data-target="sms_box">
...
</div>
To access the element's data-attribute you can use the attr() method as in #fmsf's example, but the best practice is to use jQuery's data() method like so:
function slideonlyone() {
var trigger_id = $(this).attr('id'); // This would be 'some-id' in our example
var target_id = $(this).data('target'); // This would be 'sms_box'
...
}
Note how data-target is accessed with data('target'), without the data- prefix. Using data-attributes you can attach all sorts of information to an element and jQuery would automatically add them to the element's data object.
Why do you need to attach it to the HTML? Just bind the function with hover
$("div.system_box").hover(function(){ mousin },
function() { mouseout });
If you do insist to have JS references inside the html, which is usualy a bad idea you can use:
onmouseover="yourJavaScriptCode()"
after topic edit:
<div class="system_box" data-target="sms_box">
...
$("div.system_box").click(function(){ slideonlyone($(this).attr("data-target")); });
You can bind the mouseenter and mouseleave events and jQuery will emulate those where they are not native.
$("div.system_box").on('mouseenter', function(){
//enter
})
.on('mouseleave', function(){
//leave
});
fiddle
note: do not use hover as that is deprecated
There's several things you can improve upon here. To start, there's no reason to use an <a> (anchor) tag since you don't have a link.
Every element can be bound to click and hover events... divs, spans, labels, inputs, etc.
I can't really identify what it is you're trying to do, though. You're mixing the goal with your own implementation and, from what I've seen so far, you're not really sure how to do it. Could you better illustrate what it is you're trying to accomplish?
== EDIT ==
The requirements are still very vague. I've implemented a very quick version of what I'm imagining you're saying ... or something close that illustrates how you might be able to do it. Left me know if I'm on the right track.
http://jsfiddle.net/THEtheChad/j9Ump/
I'm semi-new to Javascript/jQuery so apologies in advanced if I'm missing something basic. I have a function that is triggered whenever a user types in an element with a specific class.
$('.relevantClass').keyup(function(){
//code...
});
Now this function may end up, depending on the situation, creating a good deal of new HTML including new instances of relevantClass through the .append() method.
var newHTML = <div class='relevantclass'>Content...</div>;
$('#wrapper').append(newHtml);
However, the jQuery selector does not seem to detect and execute the function when a user types in the newly created relevantClasses. I've checked the newly created Html and it has the correct class tags and old instances of the relevant class due work.
I'm guessing this has something to do with .append(); messing with the DOM and I need someway to "refresh" the selector and let it do its jQuery thing researching the DOM to find the new classes. Any thoughts on how to do this? Is there some jQuery method I can't find?
You have to use on() to attach events that work on dynamic content:
var $parent = $("selector"); //the element you're appending .relevantClass to
$parent.on("keyup",".relevantClass",function(){
//code...
});
Keep in mind that to work with dynamic content, you have to attach the event to relevantClass's closest parent that exists on page load.
Some people use body, but you should get used to using parent elements as close as you can get to the dynamic content. This is so that event delegation occurs on a smaller scale.
More info on on() here.
Also, I hope that newhtml variable is wrapped in quotes.
$('.relevantClass').on('keyup', function(){
//code...
});
Try something like
$('body').on('keyup', '.relevantClass', function() { ... }
The idea is that you use an existing root element and use your class selector as a filter. See the examples here.
I've looked through some of the other posts but couldn't find an answer, so sorry if this is a somewhat stupid question.
I have a div
which I add span elements dynamically to, like <span id="agolf-squirecreek1.jpg">golf-squirecreek1.jpg</span>. I need to remove these elements dynamically as well when clicked on. I have the click event linked with .live(), but the remove() wont work on it. Any ideas?
Try to use .remove
http://api.jquery.com/remove/
Or
Why dont you hide the element on click using
.hide()
or by putting style or class. .add() or .addClass
or replace the html itself by .html or .text
This will remove a span when clicked within the context of div#id.
$('div#id').delegate('span', 'click', function() {
$(this).remove();
});
If you want to remove everything within an element you can use .empty() and furthermore, if you want to remove a span element but retain its event handlers/data object you can use .detach() which is useful if you intend to add the element back to the DOM.