I am creating a chat application in Angular and I am trying to set up the UI for it. I need to create a div that will be housing the chat messages and as more messages fill the div I do not want the div to expand but just stay the same size and show a scroll bar. This div should be 100% the size of the parent div. As you click the button to add data the div grows. Even if I set a height in px or percent format the div still grows.
The page you link won't load but here are the basics to make a scrollable element:
HTML / JS Structure
Make an outer container div
Make an inner container div (this will be the "scroll wrapper")
Append the inner container to the outer container
Insert whatever you need into the inner container (you can use something like insertAdjacentHtml or whatever works for your specific situation)
This order of steps in particular will work well for a scenario where the contents are dynamically changing.
CSS
For the outer container
Set a fixed value for width and set height: auto
Set a border-radius if you want circular edges
Set overflow: hidden to keep the scroll wrapper's corners from popping out
You will probably want some padding
For the inner container
Set position: relative
Set overflow-y: auto and overflow-x: hidden so that you can scroll up and down, but not side to side
For the desired overflow behavior, you need to set width: 100% and set fixed values for max-height and min-height. (max-height decides when things will start to overflow ie. make a scroll bar)
You will want max-height and min-height to be less than the outer container's fixed width + any padding, etc. it may have.
Related
I have a navigation (Sample Wireframe) which has a colored background. The nav items are in a list, and at different resolutions. As the font size changes the nav container's height also expands or contracts. However, I want one of these items (the middle one) to have a larger height and break the bounds of the container.
Is the cleanest way to do this to set the height of the container to be equal to the height of the other buttons using javascript, or will that still always cut off the larger nav item? I can't seem to break out one of the items from the bounds of the container without doing absolute positioning which completely takes it out of the flow of the other list items, and I want the height of the container to stay consistent with the rest of the buttons. Any thoughts?
Create the item with position:absolute set as a style property.
You may need to create another element next to it with the regular height that will be hidden behind it to keep the width reserved.
position:absolute
will do the trick but also consider about having an extra div (nested div) so it isolates from the bigger item.
As others said, position: absolute. It is important to note that an absolutely positioned element will have its origin point at the nearest element with position: relative (or the root element), so if you set the parent container to relative, the absolute menu item will start there.
I have a position:fixed div that serves as a container for a top menu. I want the following div, which is the container for the rest of the contents, to be placed exactly after the fixed div, to avoid content being hidden under the top div, but also avoid some sort of "blank space" between them.
The basic workaround this is setting a fixed "margin-top" value, but i was wondering if it's possible to set the contents container "margin-top" value to the height of the fixed top menu div using CSS, or is it preferable to do it with JavaScript?
Here's the basic layout example:
<div id="divTopFixed" style="width: 100%; position: fixed; top: 0px;">Some DIVs<br>That create variable height</div>
<div style="margin-top: 40px; width:100%;">CONTENTS<br>...</div>
And a JSFiddle: http://jsfiddle.net/zzcbajtz/
Setting margin-top to a fixed value is usually the right way to go about this.
If you're not sure about the height of the fixed top menu or it changes dynamically based on contents, you can use JavaScript/DOM events to adapt the margin value dynamically (e.g. in case the menu changes height when you resize the window, you could watch for the resize event and adjust the margin value).
I've updated the JSFiddle to show an example of how to tap into the resize event and set the margin by querying the offsetHeight of the fixed element: http://jsfiddle.net/zzcbajtz/2/
window.addEventListener('resize', (function resize(){
document.getElementById('the_div').style.marginTop =
document.getElementById('divTopFixed').offsetHeight + 'px';
return resize;
})());
This code fires when the document is loaded and then again whenever the window is resized.
CSS can't calculate complex layouts like this for you, unfortunately. There's some better support for layouts coming in the future (but I think even that doesn't solve the problem you're experiencing here).
I have the following scenario on JSFiddle: http://jsfiddle.net/psax3fge/
D FIDDLE: http://jsfiddle.net/psax3fge/1/
Basically its a div that has some info in it. The info is 3 separate divs that are inline block, they will be next to each other if there is enough room but will stack underneath each other when the Windows is made smaller
I want this div to be hidden until a button is clicked where the div slides down. I know not setting the height property will make the div have a fluid height (height gets bigger as things stack underneath each other). However, when I animate it with jQuery, I have to set a height.
Is there a way to do this without losing the fluidity of the div? An alternative is to not animate the div and just make it visible/hidden on button click, but I'd really like to use the animation
Update 4: http://jsfiddle.net/psax3fge/4/
Leave the .container div height to auto and remove the overflow from it.
Now you can use the slideToggle function of the jQuery to show and hide the .container.
P.S you can set display:none to container in initialization.
I have <div> elements as pages, and "next" and "back" buttons to switch between them. When the "next" button is clicked, the current page fades out and the next page fades in, using jQuery. As I've been doing it so far, the only way to ensure that the divs sit on top of each other instead of sitting next to each other is to style them position:absolute. However, this forces the divs to also overlay anything else on the page that they would otherwise push out of the way.
Is there any way to make divs basically positioned absolute only relative to each other, and still act as though they are positioned relative to the rest of the page? I've tried putting them inside a container that is positioned relatively, but the divs overflow their container, making it more or less useless.
Edit:
Basic fiddle: http://jsfiddle.net/9AXS4/4/
Yes, I mix up $ and jQuery. I've been using jQuery a lot after calling jQuery.noConflict()
If your pages, as you call them, are of fixed width and height, then you can set their container to be position:relative and also have the width and height of the pages..
.container{
position:relative;
width:500px; /*the total width of a page, including padding and borders*/
height:400px; /*the total height of a page, including padding and borders*/
}
This way the container element will handle the pushing around of the other elements
Here is your corrected fiddle: http://jsfiddle.net/gaby/9AXS4/2/
(the width/height of the container must account for paddings and border on the page elements)
Also you were targeting the container with .pagecontainer instead of #pagecontainer (since you used an id)
Update (after comment about arbitrary heights..)
Since your pages height is not fixed, you will need to resort to jQuery to resize the container..
Here is a full demo : http://jsfiddle.net/gaby/9AXS4/7/
The divs can't be positioned absolute in relation to each other, but they can be positioned absolutely in relation to an outer div. The container that holds the page divs should have position: relative in order to contain the inner page divs that are absolutely positioned.
If there is unwanted overlap, you can use overflow: hidden or overflow: auto on the outer div to hide it, depending on whether or not you want to allow for scrolling. If you are going to use the overflow property, be sure to include a height and width so the browser knows where the overflow should be.
http://jsfiddle.net/vkTXs/
$(".page").each(function(){
jQuery(this).hide();
});
$(".page").first().show();
$(".next").click(function() {
jQuery(this)
.parent().fadeOut()
.next().fadeIn();
var page = $(this).parent().next();
resizeContainer(page);
});
$(".back").click(function() {
jQuery(this)
.parent().fadeOut()
.prev().fadeIn();
var page = $(this).parent().next();
resizeContainer(page);
});
function resizeContainer(page){
// get height of next page
var newPageHeight = $(page).height();
// add padding and border
newPageHeight = newPageHeight + 14;
$('#pagecontainer').height(newPageHeight);
}
I am using JQuery Tools Scrollable to build a full-page-width scrollable form, such that each page of the form scrolls all the way across the page, replaced by the next page sliding in from the right.
The problem I'm having is how to center each page such that it stays centered amidst browser resizing and in-browser zooming (Ctrl +/-). My code is based upon: http://flowplayer.org/tools/demos/scrollable/site-navigation.html
I've tried encasing my code in a div like this:
<div style="margin-left:-440px; padding-left:50%; width:50%; min-width:880px;">
But, because this div is itself positioned in the middle of the page, the scrolling pages don't slide all the way to the left edge - they cut out at the div's edge about 30% away from left, which looks bad.
The only conclusion I can think of is to dynamically alter the margin-left I've defined on div class="items" to make sure it's always equal to 50% - 440px but no less than 0.
How can I do this using javascript?
is the container div absolute or relative positioned? If it has a specific width, let's say "800px", then centering it horizontally is easy with auto margins on left and right, e.g. margin: 0 auto. Otherwise it gets tricker.
If you want to respond to resize in Javascript, in jquery I do something like $(window).resize(function() {}) (docs here) and inside of the handler function update some value in CSS. If you just want to increase the width but still have auto-margins, you could select your div and update the width property, e.g. $('.mydiv').css('width', '900px');. This would fire any time the window is resized.