I am trying to build a simple dropdown plugin for small project of mine. I do not want to use ready plugins, I want to learn by making one on my own.
html:
<div>
<span class="dropdown_triger">press</span>
<div class="content dropdown-closed">
</div>
</div>
css:
span{
display:inline-block;
background: green;
padding: 5px;
}
.content{
position: absolute;
top: 40px;
border: solid 1px black;
width: 200px;
height: 100px;
}
.dropdown-closed { display: none; }
.dropdown-open { display: block; }
and JS:
$(document).ready(function(){
$('body').on('click', '.dropdown_triger', function(e){
var $wrapper = $(this).parent();
var $content = $(this).next();
var $triger = $(this);
if($triger.hasClass('selected')){
$(document).off('mouseup.dropdownDocClick');
console.log('hasClass');
}
$triger.toggleClass('selected');
$content.toggleClass('dropdown-closed dropdown-open');
$(document).on('mouseup.dropdownDocClick',function (e){
console.log('fire');
if (!$wrapper.is(e.target) && $wrapper.has(e.target).length === 0){
if($content.hasClass('dropdown-open')){
$content.toggleClass('dropdown-closed dropdown-open');
$(document).off('mouseup.dropdownDocClick');
}
}
});
});
});
Everything works except for this place:
if($triger.hasClass('selected')){
$(document).off('mouseup.dropdownDocClick');
console.log('hasClass');
}
I expect that mouseup event would not fire anymore but it does. Here is a fiddle, just try it. If I open dropdown, mouseup event is attached to document and keeps firing until I have clicked outside container thus closed dropdown.
But if I close dropdown by clicking again on triger button(span in my example) event is not removed and I can not understand why?
Related
I just need to have a modal close on click off of it. I tried 2 approaches:
Targeting a click event on body and check if the modal has a class and if it does show it
check the event.target and if it's not the modal hide it
Two attempts are below:
$(function(e) {
$("#filter-button").click(function(e) {
$(".dialog").toggleClass("show");
});
$("body").click(function() {
if ($(".dialog").hasClass("show")) {
$(".dialog").removeClass("show");
}
});
});
.dialog {
display: none;
width: 300px;
height: 300px;
background-color: red;
}
.show {
display: block !important;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<button id="filter-button">SHOW/HIDE</button>
<div class="dialog"></div>
Upon click on "SHOW/HIDE" the modal (a red box) does not even open. I think this might have something to do with #filter-button being counted as a target? As a troubleshooting initiative for the above sample, I attempted to use e.currentTarget https://developer.mozilla.org/en-US/docs/Web/API/Event/currentTarget so basically changing the above to:
$(function(e) {
console.log(e.currentTarget);
...
I got nothing in the console so I can't tell if that's the issue.
I also tried to log e.target and got no results in the console as well.
Why is that?
My next attempt:
$(function(e) {
$("#filter-button").click(function(e) {
$(".dialog").toggleClass("show");
});
if(e.currentTarget != $("#filter-button")) {
$(".dialog").removeClass("show");
}
});
.dialog {
display: none;
width: 300px;
height: 300px;
background-color: red;
}
.show {
display: block !important;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<button id="filter-button">SHOW/HIDE</button>
<div class="dialog"></div>
The toggle function is restored, but clicking off of the modal does not close it. I found: Check if event target is hyperlink so I changed my code to:
$(function(e) {
$("#filter-button").click(function(e) {
$(".dialog").toggleClass("show");
});
if(e.target.tagName.toLowerCase() === 'body') {
$(".dialog").removeClass("show");
}
});
This breaks my previous code again, and now my dialog doesn't open at all.
howcome I can't console log e.target?
Why is the modal not opening at all in the first example? Is it because of a logic error with targeting body somehow?
Which is the better way? e.target or attaching a click event to the body?
To simplify things you could wrap your modal dialogue within a container that is full width and height of the viewport. This way you can show or hide the parent container if it is clicked instead of showing and hiding just the dialogue.
This also allows you to add an overlay with css later on to increase the visibility of the modal.
$(function(e) {
var modal = $(".modal-wrapper")
$("#filter-button").click(function(e) {
modal.toggleClass("show");
});
$(window).click(function(e) {
if (e.target == modal[0]) {
modal.removeClass("show");
}
});
});
.modal-wrapper {
display: none;
width: 100vw;
height: 100vh;
position: absolute;
top: 0;
left: 0;
}
.modal {
width: 300px;
height: 300px;
background-color: red;
}
.show {
display: block;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<button id="filter-button">SHOW/HIDE</button>
<div class="modal-wrapper">
<div class="modal"></div>
</div>
I am trying to change content in the div, when user typing in other div. Everything works fine: JSFiddle
But when I insert these divs inside another div (I insert these divs inside HTML-editor that is editable div) - it is not working at all.
How can it block this?
$(document).keyup(function() {
var add_title = $("#add_title").html();
$("#title").html(add_title);
});
* {
box-sizing: border-box;
}
.input {
display: inline-block;
min-width: 400px;
min-height: 40px;
padding: 10px;
border: 1px solid blue;
}
.title {
margin-bottom: 10px;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id=title class=title>default</div>
<div id=add_title class=input contenteditable=true></div>
Try this.
$(document).on('keyup','.input',function () {
var add_title = $(this).html();
$( "#title" ).html(add_title);
});
It seems like you are adding dynamic elements to the page and for those elements it is not working. if that is the issue then you have to look into event delegation a bit more. The above code will hopefully fix your issue.
I've been having problems with creating a colored block which is hidden, and then appears after a mouse press (no where specific, anywhere on the page), then stays there for 2 seconds and then disappears again... until another mouse press happens, and the whole thing happens again. Have been experimenting with '.click(function' and other things but haven't been able to make it work.
At the moment I have a DIV layer like this...
HTML:
<div class="overlay"></div>
CSS:
.overlay {
position: absolute;
z-index: 1000;
right: 240px;
top: 500px;
width: 1000px;
height: 100px;
background: rgba(255, 255, 200, 100);
}
I'm quite new to javascript so any advice will be very helpful.
You can do it using setTimeout in jQuery
$( "#target" ).on( "click", function() {
$("#messageBox").hide().slideDown();
setTimeout(function(){
$("#messageBox").hide();
}, 2000);
});
#messageBox {
display:inline-block;
float:right;
border:1px solid #060;
background:#FFC;
padding:10px 20px;
box-shadow:2px 2px 4px #666;
color:#060;
font-weight:bold;
display:none;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<div id="messageBox">
Hi there.
</div>
<input type="button" id ="target" value="click"/>
The jQuery(document) does the trick as it will consider click for the whole document and not to a specific place on page.
jQuery(document).click(function(event) {
var $div = $(".overlay");
if ($div.is(":visible")) { return; }
$div.show();
setTimeout(function() {
$div.hide();
}, 2000);
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
Doing this you do need a target div or element to fire an event on click. This will allow you to fire the event on the whole document.
When dragging and entering the <div class="upload-cont"> the color changes perfectly from gray to black of border and text and when it comes to the <span class="add-text"> it changes back to gray.
CSS:
.upload-cont{
cursor:pointer;
margin-left:130px;
display:inline-block;
border:2px dashed #a8a8a8;
max-width:220px;
max-height:180px;
min-width:220px;
min-height:180px;
position:relative;
border-radius:3px;
}
.add-text{
display:block;
font-size:10px;
font-weight:bold;
color:#999;
word-wrap:break-word;
text-align:center;
width:100px;
top:37%;
left:25%;
position:absolute;
}
.add-text:hover{ color:black; }
HTML:
<div class="upload-cont">
<span class="add-text">
Click to add or<br/>
Drag and drop image here
</span>
</div>
Jquery:
$(document).ready(function () {
$(".upload-cont,.add-text").on('dragenter', function (e) {
$(".upload-cont").css({
"border": "2px dashed black"
});
$(".add-text").css({
"color": "black"
});
});
$(".upload-cont").on('dragleave', function (e) {
$(".upload-cont").css("border", "2px dashed #a8a8a8");
$(".add-text").css({
"color": "#a8a8a8"
});
});
});
What can i do to remain the black color for the border and text when entering <span class="add-text">
Check this jsfiddle: http://jsfiddle.net/rpABs/
Thanks in advance
Use dragover instead of dragenter since dragleave fires when you enter child elements
$(".upload-cont,.add-text").on('dragover', function (e) {
$(".upload-cont").css({
"border": "2px dashed black"
});
$(".add-text").css({
"color": "black"
});
});
$(".upload-cont").on('dragleave', function (e) {
$(".upload-cont").css("border", "2px dashed #a8a8a8");
$(".add-text").css({
"color": "#a8a8a8"
});
});
DEMO
Apparently this problem is more recurrent than I thought since I found at least 5 questions associated with the same topic (and I will answer all related with this issue).
Unlike "mouseover", the events "dragover" and "dragleave" do not consider the child elements as a whole, so each time the mouse passes over any of the children, "dragleave" will be triggered.
Thinking about the upload of files, I created a widget that allows:
Drag and drop desktop files using $ _FILES
Drag and drop to browser images/elements or url using $ _POST and cURL
Attach a device file using button using $ _FILES
Use input to write/paste url images/elements using $ _POST and cURL
The problem: As everything, both form inputs and images, are within DIVs children, "dragleave" was triggered even if it did not leave the dashed line. Using the attribute "pointer-events: none" is not an alternative since methods 3 and 4 need to trigger "onchange" events.
The solution? An overlapping DIV that covers all the drop-container when the mouse enters, and the only one with child elements with "pointer-events: none".
The structure:
div #drop-container: main div, keep all togheter
div #drop-area: "dragenter" listener and inmediate trigger #drop-pupup
div #drop-pupup: at same leval as #drop-area, "dragenter", "dragleave" and "drop" listener
Then, when the mouse enters by dragging an element to #drop-area, inmediatly shows #drop-pupup ahead and successively the events are on this div and not the initial receiver.
Here is the JS/jQuery code. I took the liberty to leave the PoC so do not lose all the time I lost.
jQuery(document).on('dragover', '#drop-area', function(event) {
event.preventDefault();
event.stopPropagation();
jQuery('#drop-popup').css('display','block');
});
jQuery(document).on('dragover dragleave drop', '#drop-popup', function(event) {
event.preventDefault();
event.stopPropagation();
console.log(event.type);
// layout and drop events
if ( event.type == 'dragover') {
jQuery('#drop-popup').css('display','block');
}
else {
jQuery('#drop-popup').css('display','none');
if ( event.type == 'drop' ) {
// do what you want to do
// for files: use event.originalEvent.dataTransfer.files
// for web dragged elements: use event.originalEvent.dataTransfer.getData('Text') and CURL to capture
}
}
});
body {
background: #ffffff;
margin: 0px;
font-family: sans-serif;
}
#drop-container {
margin: 100px 10%; /* for online testing purposes only */
width: 80%; /* for jsfiddle purposes only */
display: block;
float: left;
overflow: hidden;
box-sizing: content-box;
position: relative; /* needed to use absolute on #drop-popup */
border-radius: 5px;
text-align: center;
cursor: default;
border: 2px dashed #000000;
}
#drop-area {
display: block;
float: left;
padding: 10px;
width: 100%;
}
#drop-popup {
display: none;
box-sizing: content-box;
position: absolute;
width: 100%;
top: 0;
left: 0;
background: linear-gradient(to BOTTOM, rgba(245, 245, 245, 1) , rgba(245, 245, 245, 0));
height: 512px;
padding: 20px;
z-index: 20;
}
#drop-popup > p {
pointer-events: none;
}
<html>
<head>
<title>Drag and Drop</title>
</head>
<body>
<div id="drop-container">
<div id="drop-area">
<p>Child paragraph content inside drop area saying "drop a file or an image in the dashed area"</p>
<div>This is a child div No. 1</div>
<div>This is a child div No. 2</div>
</div>
<div id="drop-popup">
<p>This DIV will cover all childs on main DIV dropover event and current P tag is the only one with CSS "pointer-events: none;"</p>
</div>
</div>
<script src="https://code.jquery.com/jquery-3.4.1.min.js" type="text/javascript"></script>
</body>
<html>
About jQuery "on", use it with the div id inside on, so you can start event triggers starting "uploading box" hidden.
Finally, I preferred to use "dragover" over "dragenter" because it has a small delay (milliseconds) that favors performance
(https://developer.mozilla.org/en-US/docs/Web/API/Document/dragover_event).
The dragover event fires constantly as you're dragging, so I'm not a fan of that solution. I've written a little library called Dragster that gives me better enter & leave events.
I’m after a hand with a bit of JavaScript if possible, I’m working on a collapsible list using jQuery and want to change a background image in a css file dependent on the state of the list
This is the html for the div
<div class="collapse_div">
<div class="header_div">header text</div>
<div class="content_div">
Some text
</div>
<div class="header_div">another header</div>
<div class="content_div">
some more text
</div>
</div>
This is the .css that puts the image (expanded.gif) into the header div
.collapse_div{
margin: 0;
padding: 0;
width: 500px;
}
.header_div {
margin: 1px;
color: #000;
padding: 3px 10px;
cursor: pointer;
position: relative;
background: url(expanded.gif) no-repeat 95%;
background-color:#ccc;
}
.content_div {
padding: 5px 10px;
background-color:#fafafa;
}
And this is the javascript function that controls the expand/collapse when header_div is clicked
jQuery(document).ready(function() {
jQuery(".content_div").hide();
//toggle the componenet with class msg_body
jQuery(".header_div").click(function()
{
jQuery(this).next(".content_div").slideToggle(500);
});
});
I’ve played around with adding code to the .click(function) to try and change the background css tag in .header_div to another file (collapse.gif) but I can’t get it to work, so I thought I’d ask the experts as my javascript is really rusty
At the moment the collapse/expand of the div works fine having the background image change on click would really make it look good
You can have a class with the requried background set and apply that class conditionally. Try this
CSS
.header_div_collapsed {
background: url(collapse.gif) no-repeat 95% !important;
}
JS
jQuery(document).ready(function() {
jQuery(".content_div").hide();
//toggle the componenet with class msg_body
jQuery(".expand_div").click(function()
{
jQuery(this).next(".content_div").slideToggle(500, function(){
var $this = $(this);
if($this.is(':visible')){
$this.removeClass('header_div_collapsed');
}
else{
$this.addClass('header_div_collapsed');
}
});
});
});
Your script should be something like this,
jQuery(document).ready(function() {
jQuery(".content_div").hide();
//toggle the componenet with class msg_body
jQuery(".expand_div").click(function()
{
var elm = jQuery( this );
jQuery(this).next(".content_div").slideToggle(500, function(){
if(jQuery(this).is(":visible"))
jQuery(elm).css({"background-image" : "collapse.gif"});
else
jQuery(elm).css({"background-image" : "expand.gif"});
});
});
});
thanks to both the suggestions post below I managed to get this to work
firstly I added a whole new css function as just defining the background didn't work
.expand_div_collapsed {
margin: 1px;
color: #000;
padding: 3px 10px;
cursor: pointer;
position: relative;
background: url(collapsed.gif) no-repeat 95%;
background-color:#ccc;
}
then the JS was changed to this
jQuery(document).ready(function() {
jQuery(".content_div").hide();
//toggle the componenet with class msg_body
jQuery(".header_div").click(function()
{
var co = jQuery(this);
jQuery(this).next(".content_div").slideToggle(500, function(){
if(jQuery(this).is(':visible')){
jQuery(co).addClass('expand_div_collapsed');
}
else{
jQuery(co).removeClass('expand_div_collapsed');
}
});
});
});
the add and remove class calls had to be swapped around and I had to define the var co before the slideToggle call
but thanks to everyone who offered suggestions as I would have never got this to work otherwise