Ok, I deal with this all the time in flash but I'm kind of lost in how to accomplish this in Javascript and CSS. I have an iframe (which by definition doesn't have an overflow property) whose width/height i'm trying to modify. Is there an easy way to change this value relative to a certain anchor point? Basically I have an ad that has a contracted and expanded state. If the expanded state expands leftward or upward, how can i modify the width/height in such a way to display the entire contents of the ad?
You can absolutely position your ad and anchor it with bottom and right:
.ad {
position: absolute;
bottom: 0;
right: 0;
}
Then when you increase the height and width, it will expand upwards and leftwards.
Related
What I am trying to figure out is how to animate a div that will start out in the middle of a div that is in the middle of a page. The div originally should not have a position: absolute. Unless it is not possible, I would like it not to start with that because it seems very tough to have any data below it. It's not going to be that big of a box. I am guessing anywhere between the height of 100px and 600px, with a width between 400px and 800px.
I originally found this JsFiddle Example that does a great job and almost exactly what I need. But the div starts with an absolute position and it is already located at the bottom right of the page to be animated.
Once the div is at the bottom right of the page, it needs to be fixed there so that I can scroll up and down the page without it moving. At this point I am not worried about being able to push it back up to the spot in which it came.
A couple things I tried: Lining it up in the position I desired, and then on the click of a button, add a class with the attribute position: absolute and calling the animate function like this:
chatWindow.stop().animate({
bottom: 0
, right: 0
}, 2000);
But my guess is that it originally needs to the the position set as in top: 0; left: 0 and that's why it won't work.
I already have it working without any animation and would love to be able to figure out how to animate this thing. Without animation, it's as simple as toggling a class with it's normal positions attributes with one that has a position: fixed; bottom: 0; right: 0.
Here is a Codepen Example that I created to show really what I need other than right animation part not being there. Any help would be awesome as I've been toying with this for quite some time now.
If you want an animation from left to right, you will have to play with left and top values. But the negative point is that will cause a weird animation because you want to keep a relative position of the box in the beginning.
So when you will do the animation, it will start from the very top left on the window, which is not good.
Like this
To avoid that, you will have to use absolute position in the beginning state. You said in your question you doesn't want it but I think it is required to get the wanted visual effect.
See here the live example with good effect
However, to keep a pretty nice animation, but I know it is not what you want, you can play with right and bottom values. It will make the box appears from the right and bottom corners of the window.
Like this
One possibility, still using absolute positioning, based on what's going on in your codepen example, would be to fake the current positioning by adding the following CSS:
.container {
padding-top: 250px;
}
.center-window {
position: absolute;
right: 50%;
margin-right: -200px; /* i.e. half of its width */
bottom: 100%;
margin-bottom: -250px; /* i.e. its height */
}
Then you could animate the right, bottom, and margin properties accordingly. See https://codepen.io/anon/pen/RaOJYY (though it doesn't currently do anything with the padding). Of course, if your not sure of the dimensions of .center-window, perhaps this solution won't quite work.
I have a div that has fixed position and bottom 0 to display at the bottom of the window.
My problem is when window resize, this div move to up and into other elements. For example when I open console box in chrome this div jump to other elements in facebook fix position such as friend list, when I open console box, element jump to up but hidden up element.
Please help me how I can fix div in window resize.
CSS Position Fixed:
Do not leave space for the element. Instead, position it at a
specified position relative to the screen's viewport and doesn't move
when scrolled. When printing, position it at that fixed position on
every page. Fixed positioning is similar to absolute positioning, with
the exception that the element's containing block is the viewport.
This is often used to create a floating element that stays in the same
position even after scrolling the page. - by Mozilla MDN
In other words, When you use position: fixed; that takes elements out of the document's regular flow.
How I can fix div in Window Re-size?
Solution: There's no way to do it as you want using CSS. You must remove position: fixed; because when you set bottom: 0px with position: fixed; to your element then it doesn't matter that what is the size (vertical) of your browser or window because position: fixed; element will always appear on the bottom of the viewport screen at 0px.
You can use
position: fixed
or
`position:absolute`
The form I am creating for a mobile website shows new fields based on previous selections. i.e. - a user selects and option from a dropdown menu (a date) and then a series of times shows up based on the day selected. The times are not showing until the day is selected.
I have a spinning loading div while the times are loaded in the background via ajax. The problem I am having is that the loading div sits at the top of the page when the 'action' is taking place about three-quarters of the way down. This 'action' part is in the viewport (it's a mobile website) and the loading div is at the top of the page - which is far above the users viewport.
How can I bring the loading div down so that it's always in the current viewport? How can I make the loading div follow the place in the form where the user currently is taking into account scrollbars?
I have been trying to use the vertically centred html/CSS model as described here:
http://www.jakpsatweb.cz/css/css-vertical-center-solution.html
But it is not working and the centre of the page doesn't seem to update at each event when a form element is clicked. I think I need to use the focus or blur event for the form field to update this and reassess, but I don't seem to be able to get it working.
Does anyone have any tips on how to move the loading div to the centre of the current viewport area each time the page increases in length?
If your loading div is designed to be inside the document flow - e.g. a new content block inside the form - it's best to use jQuery to insert the loading div inside the content itself. It will be very difficult to position it pixel-perfect otherwise.
If the loading div is to appear as an overlay to the document then you can use fixed CSS positioning with a high z-index. To center it on all screen resolutions use jQuery and the formula (window.height() - div.height())/2 as the top pixel position. The code will be similar to this answer.
Hope that helps
If you do something like this, and put the div inside your <body> tag, it will stay in the middle of the visible area.
div.loading {
position: fixed;
top: 47%;
left: 47%;
height: 6%;
width: 6%;
z-index: 1000;
}
Another solution is to put it at the end of the container content will be loading into. Just make sure to load the content before it. If you give it a margin:auto; it'll stay right in the middle and keep pushing down.
EDIT: It's also worth noting the answer here. This will prevent covering up something important in a way the user can't fix.
Set your loading div's position to fixed, this will of course cause it to escape from its parent in the DOM structure, you will then need to position it where you want it. Fixed positioning is relative to the visible area of the viewport.
<html>
<head>
<style type="text/css">
#loader {
height: 30px;
position: fixed;
top: 50%;
left: 50%;
background: #ccc;
}
</style>
</head>
<body>
<div id="loader">Loading...</div>
</body>
</html>
This will result in the loader div always being centered on the screen, no matter where the user has scrolled, left/right up/down.
I have a div which has some stuff in it, and the user has the option of clicking an 'x' to say "This is not applicable to me", for example.
Rather than delete the div, I want to play a translucent div on top of it.
I started off with some complicated javascript to determine the size and location of my div in question, and create a new one on top of it. The script was giving a size and location which looked approximately right to my eye, but the overlap div was being put in the wrong spot.
Then I realised that there is (probably) a much simpler way to do this.
I put a div with class "blackout" inside the div I want to black out. The blackout css class has a visibility set to hidden, so javascript will set that to visible when needed.
The issue I'm having is that even with this method, I can't seem to get it to precisely fill the rectangle the parent div has.
I had
.blackout
{
position: absolute;
left: 0px;
right: 0px;
top: 0px;
bottom: 0px;
background-color: black;
opacity: 0.5;
filter: alpha(opacity = 50);
}
This filled up the whole screen rather than just the parent div.
What do I need to change to make it fill the parent div only?
This filled up the whole screen rather than just the parent div.
What do I need to change to make it fill the parent div only?
You need to add position: relative to the parent div.
That will set the parent div as the "containing block" for .blackout:
If the value of the position property is absolute, the containing
block is the nearest positioned ancestor—in other words, the nearest
ancestor whose position property has one of the values absolute,
fixed, or relative.
Read more here: http://reference.sitepoint.com/css/containingblock
Using "position:absolute" positions it in relation to the next "position:relative" div. If there isn't one set then it will use the body.
You need to make the parent div CSS contain "position:relative"
On the parent div's CSS:
overflow: hidden;
should work
Add position: relative to the parent div, overflow: hidden will only hide the outside of your parent's div
Change position: absolute; to position: relative;
Set the child <div> width and height to be 100% and remove useless markup.
http://jsfiddle.net/MvPHj/
Is it possible to resize a background image on load using javascript? I don't care about dynamically resizing the image according to window size or anything, I just want to take large images and resize them to a specific width and height so that the full image fits inside a specific layout.
WORK AROUND:
I did what the people below said and used a regular tag that I sized accordingly and positioned absolutely in the containing div. I then used the z-index property to push it to the background.
img.background {
position: absolute;
top: 0;
left: 0;
width: 960px;
z-index: 0;
}
It's not possible to [reliably, x-browser] scale a background image in any way at this point, but it is available in CSS3 (spec) so hope exists for the future.
Use an actual if you want to scale, in which case yes of course you can resize whenever you wish.
Background images cannot be resized.
Your best call is to use an <img> with position:absolute