Javascript height to impact content not just div - javascript

I am working on a form on a webpage. I want to have a button on a panel which when pressed expands a div (underneath the button) to make it visible and then invisible again when the button is pressed again - a kind of further details popout box. So far i have got this:
function blockappear() {
var ourblock = document.getElementById("theblock");
ourblock.style.transition = "all 2s";
if (ourblock.style.height == "0px") {
ourblock.style.height = "220px";
} else {
ourblock.style.height = "0px";
}
}
and this:
#theblock {
background-color: #a83455;
height: 220px;
width: 100%;
padding: 0;
margin: 0;
display: block;
}
and this:
<p><button type="button" onclick="blockappear()">Try it</button></p>
<div id="theblock">
Some text
</div>
And it seems to work which is quite pleasing (even though it has taken hours to get this far). The problem is this. I want the div to change from 200px to 0px including the contents not just to the extent it can according to the contents. At the moment the div shrinks, but the content "some text" stays put on the page. I have tried changing the display attribute of the div to 'block' and 'table' and still no joy. I thought that the point of a div was that it enclosed the content with the group tags and that the content could not exist without the div. If the div has 0px height how can the text still show?
Incidentally, if i just use display:none; on the div it works (without the transition of course). I need the content of the div to respond to the height of the div somehow - i suspect using the css properly.
I think this has been covered before by using jquery, but i want to use javascript now that i have started as it will probably take me another few hours if i start again with a whole new language :-)
Thanks for any help...

Add overflow: hidden; to your div. This will hide the content which doesn't fit into the container.

You want to use this CSS property on your div:
overflow: hidden;
This will make any content of #theblock bigger than #theblock itself invisible. So - if #theblock has height of 0px - all of its contents will be hidden.
Default value is overflow: visible;, so even content bigger than containing element itself will still be there for all to see. That's all there is to it.
Read more: overflow CSS property (MDN)

Related

How to make full width div appear under a grid item on click

I'm trying to get a full width content box to appear underneath a grid item on click... I have it appearing when the grid is 4 wide, but because of the absolute positioning, it covers up items below it.
The behavior that I'm after is that it would move the other grid items below it down when a full width content box appears. I can't have it covering up any of the other grid items. Note that the height of the full-width content box would change based on the content length within it.
.track-box, .content {
padding-top: 50px;
padding-bottom: 50px;
margin: 5px;
}
.track-content {
position: absolute;
left: 0;
max-width: 100%;
padding: 20px;
margin: 10px;
}
https://codepen.io/Finches/pen/XVgxEb
Any help on how to approach this? Thanks.
One solution would be for you to toggle a class on the track-box-container div when the box is clicked. Then you could just set the height manually when that class is added or taken away.
See my codepen
This is the easiest way to do it without changing a lot of your code. The only issue is the height will need to be static instead of flexible.
Hope this helps.
I made a solution that uses the dynamic height of the content boxes... this way the items in the grid will move down the proper amount no matter how small or large the content is in the content box and the content will fit in the content box properly. This would need refined a bit, but it seems to work fairly well.
$('.track-box-container').click(function() {
//Get height of content
var height = $(this).find('.track-content').height() + 250;
//Convert height to string
var heightStr = height.toString();
//Toggle height and content box display
if ($(this).height() == 200) {
$(this).animate({height: heightStr});
$(this).find('.track-content').show();
}
else if ($(this).height() == heightStr) {
$(this).find('.track-content').hide();
$(this).animate({height: "200px"});
}
});
https://codepen.io/Finches/pen/YYQdxz

Bootstrap - Switching between Div with Jquery

So I'm using bootstrap as my responsive framework and I have a container, row I also have two div's that I'm going to be switching between using a button. So I setup my HTML and my second div I set the display to "none" to hide it. However when using Jquery fadeIn/fadeOut you can see there is some shifting/expanding in terms of the Height.
Now I think to get around this I have to set the position to Absolute and also change the z-index of the first and second div so one is hidden behind the other. Using absolute however breaks the bootstrap container... So is there a way to switch the Div without the shifting in height when the button is clicked. Added some source so you can see what happens when to buttons are clicked.
http://www.bootply.com/hBNIHfCpxR
Try this:
http://www.bootply.com/PIG2icyErI
Relevant CSS:
.row {
position: relative;
padding-top: 50px;
}
#content-one, #content-two {
position: absolute;
width: 100%;
top: 0;
}

Overlapping dropdown

I want to embed a dropdown div in a wrapper div that has 0 height, so that it takes no space whether or not it is shown, and when it is shown, it overlays the contents placed below. Suppose that dropdown element is a div with content Foo. I did something like:
HTML
<div class="dropdown_wrapper">
<div id="dropdown_content">Foo</div>
</div>
CSS
.dropdown_wrapper{
height: 0;
overflow: visible;
}
And through Javascript, I switched the #dropdown_content's style between display: block and display: none. When it is the former, I expect the content to be shown, but it is actually not shown, hidden within the wrapper div that has 0 height.
How can this be fixed?
you probably do not want the wrapper to use any space in the document. to use it as an anchor point use
position: absolute;
overflow: visible;
on the wrapper. this way the content will set it's own bounding box.
the rest seems to work as you intended. check this FIDDLE

Fixed div as background on mobile devices

I want to use a div as a background for a website.
If I use position:fixed and set the width & size to the viewport size the design breaks on mobile devices/tablets as they do not support the fixed position.
What's the best way to set a div as a static background, so that it works on mobile devices too?
I'm not entirely sure how you intend to use the background, but I created a loose way to do this here. The tacky background is applied to a div the size of the screen, and it will not move (as long as you're careful with what you put inside it). However, the same effect could be done just by direct styles on the body - I'm not sure what exactly you need the div for, so I can't guarantee this technique will work for your use case.
How it Works
With disclaimers out of the way, here are a few details on how it works. All content will have to appear within two divs: one outer one that has the background, and an inner one to hold all of the content. The outer one is set to the size of the page and can have the background applied to it. The inner one then is set to the size of the parent, and all overflow is set to scroll. Since the outer one has no scrollbar, any interior content that exceeds the size of the background tag will cause a scrollbar to appear as though it were on the whole page, not just on a section of it. In effect, this then recreates what the body is on the average web page within the "content" div.
If you have any specific question on the styles, let me know and I'll flesh out the mechanics in more detail.
With jQuery
I suppose there's still one remaining option: use similar style rules, but absent the ability to nest everything within the background, instead prepend it, and change it's position whenever the user scrolls, like so.
Then, just inject this code:
<style>
#bg {
width: 100%;
height: 100%;
position: absolute;
top: 0px;
background-image: url(http://cdn6.staztic.com/cdn/logos/comsanzenpattern-2.png:w48h48);
margin: 0px;
padding: 0px;
overflow: hidden;
}
</style>
<script>
$("body").prepend("<div id='bg'></div>");
$(document).on("scroll", function () {
$("#bg").css("top", $(document).scrollTop())
.css("left", $(document).scrollLeft());
});
</script>
modifying the style rules for the background div accordingly, and you should be good. It will not have a good framerate since this will always appear after the scroll paint, but you're running low on options if you have so little control over the rest of the document structure and style.
You don't have to use jquery. I was able to get this effect with just CSS.
You set the div just below the initial tag. Then apply the image to the html within the div. Give the div and id attribute as well (#background_wrap in this case).
...I tried this without applying the actual image link within the html and it never worked properly because you still have to use "background-image:" attribute when applying the image to the background within css. The trick to getting this to work on the mobile device is not using any background image settings. These values were specific for my project but it worked perfectly for my fixed background image to remain centered and responsive for mobile as well as larger computer viewports. Might have to tweak the values a bit for your specific project, but its worth a try! I hope this helps.
<body>
<div id="background_wrap"><img src="~/images/yourimage.png"/></div>
</body>
Then apply these settings in the CSS.
#background_wrap {
margin-left: auto;
margin-right: auto;
}
#background_wrap img {
z-index: -1;
position: fixed;
padding-top: 4.7em;
padding-left: 10%;
width: 90%;
}

how scrollable text line inside a div without showing scroll bars

plz see the below link :
Long File Name Inside A Div
when you see those long file names with firebug you will find a span that tell us ->
.FileName {
float: left;
width: 438px;
}
we have predefined width for this span!
q#1 : so why we have overflow in that div and how can i fix that ?
q#2(important) : is it possible to make that file name scrollable without showing scroll bars ?
edit
(with jquery or javascript or css)
thanks in advance
You have an overflow because this text can't break (there are no spaces):
R1DA029_APP_SW_1212_2395_GENERIC_KT_REDBROWNBLUE_CID52_49_DB3210
You could change the span's into div's and give them a height and an overflow:hidden.
Html:
<div class="FileName">R1DA029_APP_SW_1212_2395_GENERIC_KT_REDBROWNBLUE_CID52_49_DB3210 asangsm.com.rar</div>
Css:
.FileName{
float: left;
width: 438px;
height: 20px;
overflow: hidden;
}
I don't think it's possible to make that file name scrollable without showing scrollbars.
If you don't want a scrollbar, but do want to scroll, then the most apparent solution would be to use some javascript. If you're into jquery, here's some:
http://www.net-kit.com/jquery-custom-scrollbar-plugins/
I've tried one of them (http://www.demo.creamama.fr/plugin-scrollbar/), setting the div containing the text to overflow: hidden; and the div containing the scrollbar to display: none; to mimic your situation, and that gives me a scrollable div with no scrollbar.
However, I think from a UI point of view it's not the best idea to have a scrollable section without a scrollbar. At least something should light up (as with the Mac OS Lion scrollbars) indicating you can, or are, scrolling. You could style one of the javascript solutions out there to make this happen, for instance with a tiny scrollbar or indicator.
Short of using CSS3's marquee, I can see no simple solution. You would have to use Javascript.
As per avoiding the line break, you can use white-space: nowrap;.

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