I have a canvas in my page, and i want it to fill the page until it reaches the bottom of the page.
I have the canvas' width set to 100%, but i cannot set the height to 100% as it extends too far.
The position of the div is not 0,0 of the browser window there are other things above it, so i end up with a scroll bar because 100% height extends well below the bottom of my browser's output.
So i was wondering how can i extend the element's height to reach the bottom of the page from its current position on the web page?
<style>
.canvas{
position:absolute;
width:100%;
height:100%;
}
<style>
<div class="logo">Stuff here</div>
<div class="output">
<canvas class="canvas"></canvas>
</div>
Do i need to use JavaScript or is there a CSS method to doing this?
If you know the height of the content above the canvas, you can use top and bottom properties to take up the rest of the space:
JS Fiddle
.logo {
height: 40px;
}
.output {
position: absolute;
top: 40px; // height of above content
bottom: 0;
width: 100%;
padding: 0;
}
.canvas {
position: absolute;
width: 100%;
height: 100%;
padding: 0;
margin: 0;
}
And if you don't know the height of the above content, you can calculate it:
JQuery Example: JS Fiddle
var height = $('header').height();
$('.output').css('top', height);
this technique is also great when making resizable popups with fixed height headers and footers, but fluid height content
https://jsfiddle.net/ca5tda6e/
set the header (.logo) to a fixed height
.logo{
height: 100px;
background-color: lightGray;
position: relative;
z-index: 1;
}
then position the content (.output) absolute, with a padding-top: 100px
.output{
width: 100%;
height: 100%;
box-sizing: border-box; /* so that padding is included in width/height */
padding-top: 100px; /* padding-top should be equal to .logo height */
position: absolute;
top: 0;
left: 0;
overflow: hidden; /* there was like a pixel of something i couldnt get rid of, could have been white space */
}
I've had this problem before, in CSS, create this rule....
html, body {
margin: 0;
}
Related
What I am trying to do should be simple. But somehow I am not able to find an answer to it.
Here is my codepen:
https://codepen.io/mvsimple/pen/wvgbvgQ
HTML:
<div class="parent">
<iframe class="child" src="https://reesgargi.com/"></iframe>
</div>
CSS
.parent {
position: relative;
overflow: hidden;
width: 100%;
padding-top: 62.5%;
}
.child {
position: absolute;
top: 0;
left: 0;
bottom: 0;
right: 0;
width: 100%;
height: 100%;
}
I want the iframe to fit inside the div (so that its width = parent div width)
But iframe loads the page zoomed in, from the center.
I have tried using CSS (Flexbox, Table display, and W3S trick
But I am helpless. I tried the iframe resizer library but it had its own issues. (Dragging)
Please advise my fellow programmers.
Finally found a solution!
All I had to was to scale down the iFrame and set its width equal to the original size (source of that iframe).
.child{
width: 1280px;
/* Magic */
transform-origin: 0 0;
transform: scale(0.703);
}
I need to have an absolute div that is a child of only body fill the entire document area (window + any scroll area)
-- width: 100% only fills the viewable screen
I prefer a CSS only solution but pure javascript is ok. I tried without success setting:
opaque.style.minHeight = Math.max(document.body.offsetHeight, document.body.scrollHeight);
I made a jsFiddle of the code below. If you scroll down the output, you will see that the opaque div stops at whatever height the output window was when it was rendered.
In case you are wondering... it is to make an opaque overlay of all content in the div behind it (think slideshow). My only other solution is to disable scrolling, but this is problematic.
Thanks for any help.
<div class="page-container"></div>
<div id="opaque"></div>
body {
width:100%;
}
.page-container {
position: relative;
max-width:978px;
width: 100%;
min-height:2500px;
margin:0 auto -50px auto;
border:solid #999;
border-width:2px;
background: lightblue;
}
#opaque {
position: absolute;
top: 0px;
left: 0px;
width: 100%;
height: 100%;
z-index: 100;
background: grey;
filter: alpha(opacity=70);
opacity: 0.7;
}
Can use
#opaque {
position: fixed;
top: 0;
left: 0;
right:0;
bottom:0;
}
remove width:100% from body due to creates horizontal scrollbar
Depending on use case it is often common to add class to body when using such an overlay that sets body overflow to hidden
DEMO
You can put a position: relative on your body so that the body will be used as a reference point by the child element in terms of height (as opposed to the document object).
Using javascript to set one elements height equal to anothers
var o = document.getElementById('opaque');
var p = document.querySelector('.page-container');
o.style.height = window.getComputedStyle(p).getPropertyValue("height");
FIDDLE
The problem I have is that the video always gets black bars on the sides or on the top/bottom depending on the screen size.
Any idea how to get it full screen always without showing that annoying black bars? and without using a plugin.
This is my markup:
<div id="full-bg">
<div class="box iframe-box" width="1280" height="800">
<iframe src="http://player.vimeo.com/video/67794477?title=0&byline=0&portrait=0&color=0fb0d4" width="1280" height="720" frameborder="0" webkitAllowFullScreen mozallowfullscreen allowFullScreen></iframe>
</div>
</div>
#full-bg{
width: 100%;
height: 100%;
img{
display: none;
}
.iframe-box{
width: 100%;
height: 100%;
position: absolute;
background: url(../img/fittobox.png);
left: 0 !important;
top: 0 !important;
iframe{
width: 100%;
height: 100%;
}
}
}
Try adding to your CSS
.iframe-box {
max-width: 1280px; /* video width */
max-height: 720px; /* video height */
}
This means that width: 100%; height: 100% will let the element will expand as much as it can, until it hits a maximum height or width of 720px or 1280px, respectively.
If the screen you're viewing it on has a greater resolution, the node will stop expanding and you'll not have black borders.
Further, afaik the following is not valid CSS, are you using a library or something?
#full-bg {
.iframe-box {
foo: bar;
}
}
Edit after answer accepted: I just thought of a completely different way to achieve this, but it would require you to change a lot of your CSS
.fittobox { /* give fit to box an aspect ratio */
display: inline-block; /* let it be styled thusly */
padding: 0; /* get rid of pre-styling */
margin: 0;
width: 100%; /* take up full width available */
padding-top: 56.25%; /* give aspect ratio of 16:9; "720 / 1280 = 0.5625" */
height: 0px; /* don't want it to expand beyond padding */
position: relative; /* allow for absolute positioning of child elements */
}
.fittobox > iframe {
position: absolute; /* expand to fill */
top: 0px;
left: 0px;
right: 0px;
bottom: 0px;
}
If you know the aspect ratio of your video, you shouldn't even need Javascript. You can use a percentage-based padding-top.
I could post code, but I'd recommend you read this entire article anyway.
#Paul S. 's answer works for me for the .fittobox container for 16:9 video aspect ratios but the .fittobox > iframe embed still has black bars with his CSS. Removing the right and bottom positioning fixes it for me (no need for "px" in those 0 values, of course):
.fittobox > iframe {
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
}
I'm having trouble getting an overlay to appear on top of the visible portion of another div. The problem is, the container div has overflow, and if the user has scrolled inside that div, the overlay will not cover the scrolled portion. My question is: how can you position a div to fill the visible portion of another div using jQuery - or, alternatively, is there a way to accomplish this using just CSS?
Here is a jsFiddle demonstration, and here's the markup:
HTML
<div class="container">
<div class="overlay"></div>
<div class="content">
<p>Content here</p>
<p>Overflow content here</p>
</div>
</div>
CSS
div.container { position: absolute; height: 100px; width: 100px; overflow-y: auto; }
div.overlay { display: none; position: absolute; top: 0; left: 0; right: 0; bottom: 0; background: #F00; opacity: 0.5; }
div.content p { margin-bottom: 100px; }
and JS (load on DOM Ready)
$('div.container').click(function(){
$('div.overlay').toggle();
});
In order to achieve what you were asking for I did the following
CSS
.container {
/* setting this to relative means
overlay is positioned relative to its parent */
position: relative;
}
.overlay {
/* element taken out of normal flow */
position: absolute;
/* removed bottom and right properties otherwise
updating top property has no effect */
height: 100px;
/* When scrollbar appears width decreases to less than
100px hence having to set to 100% to allow automatic calculation */
width: 100%;
}
JavaScript
Using jQuery I now set the top property appropriately
$(".container").scroll( function( ) {
$(".overlay").css({ top: $(this).scrollTop( ) });
});
Fiddle here
Assuming you really want to cover only the visible portion:
http://jsfiddle.net/GNCaT/1/
<style type="text/css">
div.overlay {
display: none;
position: absolute;
top: 0;
left: 0;
right: 0;
height:100px; /* fixed height, set by CSS or javascript, no bottom */
background: #F00;
opacity: 0.5;
}
</style>
<script>
$('div.container').click(function(){
$('div.overlay').css('top', $('div.container').scrollTop() + 'px').toggle();
});
</script>
This will position the overlay to the top of the visible portion of the container.
You can use the DOM property scrollHeight :
$('div.container').click(function(){
$('div.overlay').css("height", this.scrollHeight).toggle();
});
http://jsfiddle.net/p6k2Z/1/
EDIT :
In order to just overlay the visible portion, you can use this :
$('div.container').click(function(){
$('div.overlay').css({
top: this.scrollTop,
height: $('div.container').css("height")})
.toggle();
});
http://jsfiddle.net/p6k2Z/3/
I would like to do this simple layout:
3 columns with left and right position:fixed because when scroll down, left and right supposed to stay still
We know left column width = 200px
We know middle column width = 400px
We DON'T know right column width and it should be fluid (i.e. fill in rest of the screen width OR zero)
This is the sample I have (but with col3's width as 100px). So the question is how to fix css of col3 to make it fluid but still reserve position:fixed?
http://jsfiddle.net/Endt7/1/
My last alternative is to use jQuery. But I don't want to touch it unless really necessary for layout.
Thanks.
For absolute/fixed positioned elements, width is a function of left and right. So, set the left: 600px; right: 0; on the third column and browser will determine the width. That is it. Here is the revised CSS, with few changes for consistency:
.col1 {
position: fixed;
top: 0;
bottom: 0;
left: 0;
width: 200px;
background: red;
}
.col2 {
margin-left: 200px;
width: 400px;
height: 100%;
background: green;
}
.col3 {
position: fixed;
top: 0;
bottom: 0;
left: 600px;
right: 0;
background: blue;
}
Demo here
Can do it using float:left or absolute position for the left and middle columns and set margin-left equal to their combined widths.
.col1 {
background: red;
float:left;
width: 200px;
height:100%
}
.col2 {
background: green;
float:left;
width: 400px;
height:100%
}
.col3 {
background: blue;
margin-left:600px;
}
DEMO: http://jsfiddle.net/Endt7/3/