Is there anyway to find the elements that are overflowing outside of the div?
So you can edit them somehow, using JQuery for example?
I am trying to make it with an HTML table at the moment.
Check the javascript code to verify element is overflowing. This operation on large elements may be expensive.
const p = document.querySelector('.parent');
console.log('Overflow ' + (p.offsetHeight < p.scrollHeight));
.parent{
height: 50px;
border: 1px solid;
}
.child {
height: 20
}
<div class="parent">
<div class="child">1</div>
<div class="child">2</div>
<div class="child">3</div>
<div class="child">4</div>
<div class="child">5</div>
</div>
I have 3 divs as colors to choose from and 3 blank divs. I want to let the user be able to:
(1) click a colored div and then a blank div, then the blank div is colored as the color the user choose. And the code seems to work.
(2) I want the user to be able to click the colored blank div again and it becomes white. And the code seems to work.
The problem is, if the blank div is colored and the user choose another color and click the colored blank div again, a newer color class will be added to the div, and things become unpredictable. You can open the console and track the messy change of the class of the blank div.
How can I solve this problem? I only want the blank divs to toggle between two classes.
var chosenColor;
function pickColor(arg){
chosenColor=arg.id;
}
function draw(id){
document.getElementById(id).classList.toggle("white");
document.getElementById(id).classList.toggle(chosenColor);
}
.box{
width: 100px;
height: 100px;
border: 1px solid black;
display: inline-block;
}
.red{background: red}
.blue{background: blue;}
.yellow{background: yellow;}
.white{background: white;}
<html>
<body>
<div class="box red" id="red" onclick="pickColor(this)">1</div>
<div class="box blue" id="blue" onclick="pickColor(this)">2</div>
<div class="box yellow" id="yellow" onclick="pickColor(this)">3</div>
<br><br>
<div class="box white" id="4" onclick="draw(4)">4</div>
<div class="box white" id="5" onclick="draw(5)">5</div>
<div class="box white" id="6" onclick="draw(6)">6</div>
</body>
</html>
Instead of using classes and running into the issue of assigning multiple nested classes or having to use complicated white logic...
I'd use data-* attribute:
var chosenColor;
function pick(el) {
chosenColor = el.dataset.color;
}
function draw(el) {
el.dataset.color = el.dataset.color ? "" : chosenColor;
}
body { background: #eee; }
.box {
width: 100px;
height: 100px;
border: 1px solid black;
display: inline-block;
background: white; /* BY DEFAULT !!! */
}
[data-color=red] { background: red; }
[data-color=blue] { background: blue; }
[data-color=yellow] { background: yellow; }
<div class="box" onclick="pick(this)" data-color="red">1</div>
<div class="box" onclick="pick(this)" data-color="blue">2</div>
<div class="box" onclick="pick(this)" data-color="yellow">3</div>
<br><br>
<div class="box" onclick="draw(this)">4</div>
<div class="box" onclick="draw(this)">5</div>
<div class="box" onclick="draw(this)">6</div>
What the ternary el.dataset.color = el.dataset.color ? "" : chosenColor; does is:
if the element has already any data-color set data-color to "" (nothing)
otherwise set data-color to the preselected chosenColor
Check to see if the element's classname is white. If not, set its class name to white - else, set it to the chosen color. You can put the boxes in a container and use .container > div selector, removing the need to give the boxes the .box class. Also, in a listener, this will refer to the clicked element - there's no need to use getElementById when you already have a reference to the element.
var chosenColor;
function pickColor(arg) {
chosenColor = arg.id;
}
function draw(element, id) {
if (element.className !== 'white') element.className = 'white';
else element.className = chosenColor;
}
.container > div {
width: 100px;
height: 100px;
border: 1px solid black;
display: inline-block;
}
.red {
background: red
}
.blue {
background: blue;
}
.yellow {
background: yellow;
}
.white {
background: white;
}
<div class="container">
<div class="red" id="red" onclick="pickColor(this)">1</div>
<div class="blue" id="blue" onclick="pickColor(this)">2</div>
<div class="yellow" id="yellow" onclick="pickColor(this)">3</div>
<br><br>
<div class="white" id="4" onclick="draw(this, 4)">4</div>
<div class="white" id="5" onclick="draw(this, 5)">5</div>
<div class="white" id="6" onclick="draw(this, 6)">6</div>
</div>
Answer
See - https://codepen.io/stephanieschellin/pen/xyYxrj/ (commented code)
or ...
var activeColor
function setPickerColor(event) {
activeColor = event.target.dataset.boxColorIs
}
function setThisBoxColor(event) {
let element = event.target
let the_existing_color_of_this_box = element.dataset.boxColorIs
if (the_existing_color_of_this_box == activeColor) {
delete element.dataset.boxColorIs
} else {
element.dataset.boxColorIs = activeColor
}
}
.box {
width: 100px;
height: 100px;
border: 1px solid black;
display: inline-block;
background: white;
}
[data-box-color-is="red"] {
background: red
}
[data-box-color-is="blue"] {
background: blue;
}
[data-box-color-is="yellow"] {
background: yellow;
}
<html>
<body>
<div id="box-1" class="box" data-box-color-is="red" onclick="setPickerColor(event)">1</div>
<div id="box-2" class="box" data-box-color-is="blue" onclick="setPickerColor(event)">2</div>
<div id="box-3" class="box" data-box-color-is="yellow" onclick="setPickerColor(event)">3</div>
<br>
<br>
<div id="box-4" class="box" onclick="setThisBoxColor(event)">4</div>
<div id="box-5" class="box" onclick="setThisBoxColor(event)">5</div>
<div id="box-6" class="box" onclick="setThisBoxColor(event)">6</div>
</body>
</html>
Using data- attributes you are able to decouple the JavaScript functional concerns form the CSS classes. This simplifies your logic but most importantly it allows folks styling your app to work independently from the folks adding JS functionality. This decoupling becomes really important when your team is using BEM or an OOCSS pattern.
Ideally instead of attaching styles to the data- attribute you would maintain the 'state' using data- and have another function that sets the classList based on the data- state. Allowing you to be 100% sure style changes you make will never effect JS functionality (QA will love you). But that's an evolution beyond this post.
With this setup we are not using the id's but I left them in because its an important best practice. Most likely this code would evolve into a component with listeners instead of inline onClick calls. JavaScript selectors should always be attached to id's or data- variables, never classes. Also, the id's should always be there for the QA team to utilize in their scripts. You risk some one changing a class name or removing it to adjust the styles and inadvertently breaking your JS listener.
I switched the arguments to pass the 'event' instead of the 'this' which is the element. Anyone using your JS event functions is going to expect the event object as the first parameter. You can pass 'this' as the second parameter if you like, but event.target will give you the same thing.
One other thing to note is the syntax change between declaring the data- variable and calling it from the JS.
HTML <div data-box-color-is="red">1</div>
JS event.target.dataset.boxColorIs
Regardless of how you format you data- attribute name it will always be parsed into camelCase when referencing it in JS ... data-box_color--IS would still become ... dataset.boxColorIs
Also as an evolution to your code you could remove the global JS var and store the value on the <body> or some other element on the page using data-. This will give you a single source of truth or 'state' that multiple features/components can reference without cluttering the global space.
Further Reading
https://css-tricks.com/bem-101/
https://en.bem.info/
https://philipwalton.com/articles/side-effects-in-css/
https://csswizardry.com/2015/03/more-transparent-ui-code-with-namespaces/
https://philipwalton.com/articles/decoupling-html-css-and-javascript/
I'm using jQuery panzoom to zoom an image and some div elements. This works generally but the elements positioned on top of the image don't stay in their original locations. Is there anyway to keep the div elements where they were whilst being scaled?
JSFiddle: https://jsfiddle.net/828wu2dy/
HTML:
<section id="inverted-contain">
<div class="panzoom-elements">
<div class="item item1">ITEM 1</div>
<div class="item item2">ITEM 2</div>
<div class="panzoom">
<img src="http://www.hdwallpapers.in/walls/enchanted_forest-wide.jpg">
</div>
</div>
<div class="buttons">
<button class="zoom-in">Zoom In</button>
<button class="zoom-out">Zoom Out</button>
<input type="range" class="zoom-range">
<button class="reset">Reset</button>
</div>
</section>
JS:
(function() {
var $section = $('#inverted-contain');
$section.find('.panzoom').panzoom({
$zoomIn: $section.find(".zoom-in"),
$zoomOut: $section.find(".zoom-out"),
$zoomRange: $section.find(".zoom-range"),
$reset: $section.find(".reset"),
$set: $section.find('.panzoom-elements > div'),
startTransform: 'scale(0)',
increment: 0.1,
minScale: 1,
maxScale: 2,
contain: 'invert'
}).panzoom('zoom');
})();
CSS:
.panzoom-elements {
width: 50%;
height: 400px;
}
.item {
position: absolute;
z-index: 10;
}
.item.item1 {
color: white;
background: black;
width:50px;
height:50px;
top: 300px;
left: 100px;
}
.item.item2 {
color: white;
background: black;
width:50px;
height:50px;
top: 200px;
left: 150px;
}
The other problem is that it also doesn't drag horizontally.
I've tried everything I can think of.
Part 1:
To fix your 'item' problem - try putting 'item' elements on one level with 'img' - I mean put them inside div class='panzoom'.
Works for me. ^ ^
<section id="inverted-contain">
<div class="panzoom-elements">
<div class="panzoom">
<div class="item item1">ITEM 1</div>
<div class="item item2">ITEM 2</div>
<img src="http://www.hdwallpapers.in/walls/enchanted_forest-wide.jpg">
</div>
</div>
<div class="buttons">
<button class="zoom-in">Zoom In</button>
<button class="zoom-out">Zoom Out</button>
<input type="range" class="zoom-range">
<button class="reset">Reset</button>
</div>
</section>
The method of thought that led me to this answer: while learning panzoom documentation for API, and examining your fiddle, I found that 'img' or anything that could be seen as direct selector to it (I mean like $('.panzoom').child().first() is nowhere mentioned in your script. That means that most probably img is zooming in/out not by itself. What I thought next - it seem that it's parent is changing. That would mean that you need to put your items inside of that changing space - it is the most logical way to handle it... I tried to test that idea - and it worked.
Part 2:
The other problem is that it also doesn't drag horizontally.
Add this to your CSS
.panzoom{ width: 1920px;}
This is the size of the image. Works for me.
Perhaps you also could add to .panzoom height of image. It is not required in your case where image is horisontal but it could matter when image is vertical.
HTML:
<div class="container" style="width:200px; height: 200px; border: 10px solid #ccc">
contents..
</div>
JQUERY:
$('.container').hover(function() {
console.log('in');
},
function() {
console.log('out');
});
It makes console.log when hover occurs both on border and div.
Objectives:
1> Want to make a `hover` event only for `div`, but not for `border`.
2> Fire another `hover` event on `border`, but not for `div`
Are the possible? if, then I want your cordial help..
A pragmatic solution would be to:
<div class="container" style="width:200px; height: 200px; border: 10px solid #ccc">
<div class="inner" style="height: 200px;">
contents..
</div>
</div>
and
$('.container .inner').hover(function() {
console.log('in');
},
function() {
console.log('out');
});
Cleanest option imo. a javascript solution would be more complex and simply not worth it.
The border IS the div, at least in part.
There's no event for specifically hovering over a border that I know of.
What you can do is have a nested div (within another div) and have a 10px padding on the internal one. This will give you 2 divs to work with and apply hover events to as well as looking the way you require.
Working example: http://jsfiddle.net/jssSA/
HTML
<div id="outer">
<div id="inner">Some content</div>
</div>
CSS
#outer,#inner{width:300px; height:300px;}
#outer{
background-color:#000;
padding:10px;
}
#inner{
background-color:#ccc;
}
jQuery
$('#outer').hover(function(){
console.log("outer in")},
function(){console.log("outer out")});
$('#inner').hover(function(){
console.log("inner in")},
function(){console.log("inner out")});
Hitting a wall with this one, hope someone can lend a hand. I have a wrapper div containing many fixed-width "content" divs. It's like a table, except that the number of items "per row" aren't fixed, so that whenever the screen size is wide, more items fit onto the screen. Pretty basic.
Also, each of these "content" divs has an adjacent "details" div that is hidden by default ("style=display:none"), and an adjacent "separator" div that is empty, containing only the style "clear:both;".
Each content/details/separator div has a unique number in its ID, so that I can tell they are related (e.g., content123, details1234, separator1234)
Now, when one of these content divs is clicked, I want to reveal its "details" div below it. That part, I've got working partially, by wrapping an anchor tag around the content div, which fires an onClick javascript event, which in turns runs a jQuery statement to make visible the details and separator divs jQuery(".details1234").css("display","block");"
But you can imagine my problem. Once that "separator" div is reveled, it pushes down (clears) any "content" divs that appears to the right of it, ugly. My thought, what I have been wrestling with for hours, is to reveal the "separator" div of the content div, that is the last one appearing in the "row" that was clicked. That way, a new "row" will be opened up by the separator, so that when the "content" div is revealed it appears below the clicked item in the new row. To do that, I need to figure out the elementID of the last content div in the "row", and I was thinking about using the Y-coord of the mouse click event, plus the X-coord = to the right-most edge of the wrapper div minus half the width of the fixed-width content div. Something like that. But I am smashed into a wall and can't figure it out.
Can anyone help me do that? Or offer a different solution?
If sample code would help let me know, I could whip up an example, but it may take some screen space in this post.
Thanks everyone.. going nuts with this.
EDIT: the sample code below is based on my site. When a cell is clicked, you can see its "details" div appear below it, but unfortunately the other divs in the "row" get pushed down. that is the effect I'm trying to avoid. When a cell is clicked, I want the "details" to appear below it, but also the other divs to stay in their positions above the other cell's details, basically I want to keep the "row" intact. In the code, you can see my fruitless experiments using a "separator" div, because my assumption is that if I can insert that after the last div in the row, then the "details" div will become the next row, followed then by the next row of cells. Hope I explained it OK. Thanksgiving feast causing blood to divert from brain ;)
<html>
<head>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js"></script>
<style type="text/css">
#overallwrapper{
background: #CCCCCC;
padding-top: 4px;
padding-left: 4px;
padding-right: 4px;
padding-bottom: 4px;
margin-top: 5px;
}
.contentcell{
border: 2px solid blue;
padding: 4px;
float: left;
width: 200px;
}
.separator{
clear:both;
display: none;
}
.details{
background:lightgreen;
border: 2px solid green;
width:450px;
display:none;
float:left;
clear:both;
}
</style>
<script type="text/javascript">
function showDetails(contentid){
//first, reset all highlights and close any open content divs
$("#overallwrapper .contentcell").css("border","2px solid blue");
$(".details").css("display","none");
$(".separator").css("display","none");
//now highlight the clicked div and reveal its content div
var contentHI = "#content"+contentid;
var detailsON = "#details"+contentid;
var separatorON = "#separator"+contentid;
$(contentHI).css("border","2px solid green");
//$(separatorON).css("display","block");
$(detailsON).css("display","block");
}
</script>
</head>
<body>
<div id="overallwrapper">
<div id="contentwrapper01">
<div id="content01" class="contentcell">cell01</div>
<div id="details01" class="details">here are details about cell01</div>
<div id="separator01" class="separator"> </div>
</div>
<div id="contentwrapper02">
<div id="content02" class="contentcell">cell02</div>
<div id="details02" class="details">here are details about cell02</div>
<div id="separator02" class="separator"></div>
</div>
<div id="contentwrapper03">
<div id="content03" class="contentcell">cell03</div>
<div id="details03" class="details">here are details about cell03</div>
<div id="separator03" class="separator"></div>
</div>
<div id="contentwrapper04">
<div id="content04" class="contentcell">cell04</div>
<div id="details04" class="details">here are details about cell04</div>
<div id="separator04" class="separator"></div>
</div>
<div id="contentwrapper05">
<div id="content05" class="contentcell">cell05</div>
<div id="details05" class="details">here are details about cell05</div>
<div id="separator05" class="separator"></div>
</div>
<div id="contentwrapper06">
<div id="content06" class="contentcell">cell06</div>
<div id="details06" class="details">here are details about cell06</div>
<div id="separator06" class="separator"></div>
</div>
<div style="clear:both;"></div><!-- to prevent parent collapse -->
</div>
</body>
</html>
User ,
if you give as regular position be default , it pushes the other contents definetly down as they come in squence.
Change the hidden divs position to absolute so that it will go out of sequence and you can position at anywhere on the page by top and left property.
get the offset of the div you want next to...
http://api.jquery.com/offset/
it will have top and left property , use those property's and position next to them.
let me know if you need anything else.
give a bigger z-index for the hidden divs.
What about showing the details div with position: absolute, on top of everything else? (See here, the code's a little messy but you get the idea).
I partially figured it out, but the logic may be very clunky. I basically walk left by 100px from the width of the container div until I find a content div. Plus it doesn't work in IE8, because IE is not getting the same results from jQuery's offset() or position() as firefox, it always reports "19". So in IE, I can never get a Y-coordinate value. I'm too sleepy now to work on this anymore today. If someone can lend a hand or tell me how to improve the javascript that would be cool.
Here is the working code for Firefox (I changed javascript and css of the detail divs, compared to original question):
<html>
<head>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js"></script>
<style type="text/css">
#overallwrapper{
background: #CCCCCC;
padding-top: 4px;
padding-left: 4px;
padding-right: 4px;
padding-bottom: 4px;
margin-top: 5px;
}
.contentcell{
border: 2px solid blue;
padding: 4px;
float: left;
width: 200px;
}
.separator{
clear:both;
display: none;
}
.details{
background:lightgreen;
border: 2px solid green;
display:none;
clear:both;
}
</style>
<script type="text/javascript">
function showDetails(contentid){
//first, reset all highlights and close any open content divs
$("#overallwrapper .contentcell").css("border","2px solid blue");
$(".details").css("display","none");
$(".separator").css("display","none");
//now highlight the clicked div and reveal its content div
//first, figure out which separator to display.
//1.get the y-pos from the clicked element, this gives y-coord of the row
contentClicked = "#content"+contentid;
var clickedoffset = $(contentClicked).offset();
var ypos = clickedoffset.top;
var wrapperwidth = $("#overallwrapper").width();
for (var xpos=wrapperwidth; xpos>0; xpos-=100){
var elematpos = document.elementFromPoint(xpos, ypos);
var elematposid = elematpos.id;
if (elematposid.substring(0,7) == "content") {
var lastcontentdivID = elematposid.substring(7);
break;
}
}
$(contentClicked).css("border","2px solid green");
var detailsON = "#details"+contentid;
$(detailsON).css("display","block");
var lastidonscreen = "#content"+lastcontentdivID;
$(detailsON).insertAfter(lastidonscreen);
}
</script>
</head>
<body>
<div id="overallwrapper">
<div id="contentwrapper01">
<div id="content01" class="contentcell">cell01</div>
<div id="separator01" class="separator"> </div>
<div id="details01" class="details">here are details about cell01</div>
</div>
<div id="contentwrapper02">
<div id="content02" class="contentcell">cell02</div>
<div id="separator02" class="separator"></div>
<div id="details02" class="details">here are details about cell02</div>
</div>
<div id="contentwrapper03">
<div id="content03" class="contentcell">cell03</div>
<div id="separator03" class="separator"></div>
<div id="details03" class="details">here are details about cell03</div>
</div>
<div id="contentwrapper04">
<div id="content04" class="contentcell">cell04</div>
<div id="separator04" class="separator"></div>
<div id="details04" class="details">here are details about cell04</div>
</div>
<div id="contentwrapper05">
<div id="content05" class="contentcell">cell05</div>
<div id="separator05" class="separator"></div>
<div id="details05" class="details">here are details about cell05</div>
</div>
<div id="contentwrapper06">
<div id="content06" class="contentcell">cell06</div>
<div id="separator06" class="separator"></div>
<div id="details06" class="details">here are details about cell06</div>
</div>
<div style="clear:both;"></div><!-- to prevent parent collapse -->
</div>
</body>
</html>
EDIT:
Blasted IE. I just can't trust it to determine screen coordinates. I got it working though, but only for Firefox. again IE is trying to drive me insane by not handling insertAfter properly. arrgh! here is the final code:
<html>
<head>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js"></script>
<style type="text/css">
#overallwrapper{
background: #CCCCCC;
padding-top: 4px;
padding-left: 4px;
padding-right: 4px;
padding-bottom: 4px;
margin-top: 5px;
}
.contentwrapper{
}
.contentcell{
padding: 4px;
float: left;
width: 200px;
height: 100px;
border: 2px solid blue;
}
.separator{
clear:both;
display: none;
}
.details{
background:lightgreen;
border: 2px solid green;
display:none;
clear:both;
}
</style>
<script type="text/javascript">
function showDetails(contentid){
//first, reset all highlights and close any open content divs
$("#overallwrapper .contentcell").css("border","2px solid blue");
$(".details").css("display","none");
$(".separator").css("display","none");
var contentClicked = "#content"+contentid;
var thisypos = $(contentClicked).offset().top;
var nextdivid = contentClicked;
var countid = contentid;
do
{
var prevdivid = nextdivid;
var nextcontentid = (countid * 1) + 1;
var nextcontentid = '' + nextcontentid;
if ( nextcontentid.length < 2)
{ nextcontentid = "0" + nextcontentid; }
nextdivid = "#content" + nextcontentid;
if ( $(nextdivid).length ) {
var nextypos = $(nextdivid).offset().top;
countid++;
} else {
break;
}
}
while (thisypos == nextypos);
$(contentClicked).css("border","2px solid green");
var detailsON = "#details"+contentid;
$(detailsON).css("display","block");
$(detailsON).insertAfter(prevdivid);
}
</script>
</head>
<body>
<div id="overallwrapper">
<div id="contentwrapper01" class="contentwrapper">
<div id="content01" class="contentcell">cell01</div>
<div id="separator01" class="separator"> </div>
<div id="details01" class="details">here are details about cell01</div>
</div>
<div id="contentwrapper02" class="contentwrapper">
<div id="content02" class="contentcell">cell02</div>
<div id="separator02" class="separator"></div>
<div id="details02" class="details">here are details about cell02</div>
</div>
<div id="contentwrapper03" class="contentwrapper">
<div id="content03" class="contentcell">cell03</div>
<div id="separator03" class="separator"></div>
<div id="details03" class="details">here are details about cell03</div>
</div>
<div id="contentwrapper04" class="contentwrapper">
<div id="content04" class="contentcell">cell04</div>
<div id="separator04" class="separator"></div>
<div id="details04" class="details">here are details about cell04</div>
</div>
<div id="contentwrapper05" class="contentwrapper">
<div id="content05" class="contentcell">cell05</div>
<div id="separator05" class="separator"></div>
<div id="details05" class="details">here are details about cell05</div>
</div>
<div id="contentwrapper06" class="contentwrapper">
<div id="content06" class="contentcell">cell06</div>
<div id="separator06" class="separator"></div>
<div id="details06" class="details">here are details about cell06</div>
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