Show a video inside a Bootstrap 4 grid area - html

I used Bootstrap 4 (4.4.1) to make a basic grid structure. It consists of two columns (each 50% width), where the left column has two rows (each 50% height). The upper left grid area should contain a video inside of it, without squeezing or squishing it. The rest that overflows should simply be hidden. I basically managed to do all of this except that the video spans over the whole left column, while I want it to be only in the first row of the column (which spans 50% of the columns height).
Relevant HTML snippet:
<div class="container-fluid d-flex h-100 flex-column">
<div class="row flex-grow-1">
<div class="col">
<div class="row h-50" id="video_wrapper" style="background-color: magenta;">
<video id="video" autoplay muted></video>
</div>
<div class="row h-50" style="background-color: lime;">
bottom left
</div>
</div>
<div class="col" style="background-color: aqua;">
<div>
right side
</div>
</div>
</div>
</div>
Relevant CSS:
#video_wrapper {
overflow: hidden;
}
#video {
/* Make video to at least 100% wide and tall */
min-width: 100%;
min-height: 100%;
/* Prevent the browser from stretching or squishing the video */
width: auto;
height: auto;
/* Horizontally flip the video */
position: absolute;
transform: scaleX(-1);
}
I tried a lot of stuff, but nothing would work. I have a JSFiddle below. It will use your webcam as the video – turn the webcam off to see the grid structure, the video should be inside the pink area. Unfortunately it also goes into the green area which should stay free. You can see this behavior when enabling your webcam.
JSFiddle: https://jsfiddle.net/matzewolf/zxbtq569/3/
Any help is really appreciated. Btw, I'm a newbie to web dev and Bootstrap, so please bear with me :)

Add position:relative to the parent of the video (class position-relative will do).
Explanation: When you use...
position: absolute;
/* top | bottom | left | right | width (%) | height (%) |
min-width (%) | max-width (%)... and there might be a few others */
...the element is sized/positioned relative to the reference parent, which is the closest positioned parent (or to <body> if none closer). Which means the closest parent with a set position other than static (which is the default value).
See it working.
A good article on CSS positioning.
Notice I also added classes d-flex justify-content-center align-items-center to the parent, which make your absolutely positioned elements be horizontally and vertically centered, responsively.

Related

How to remove gaps around div with image?

one take col-md-4, second col-md-8, but the second with a picture is not 100% width, there are gaps on the left and right sides, could anyone please advise how to remove gaps and make image full size ? Thanks. Here is screenshot
.upperDiv{
height: 100px;
width: 100%;
background: red;
margin-top: 20px;
margin-bottom: 20px;
}
.fixed-content {
width: 100%;
height: 100px;
object-fit: cover;
}
<div class="container">
<div class="row upperDiv">
<div class="col-md-4" style="background: #005AA1;">
</div>
<div class="col-md-8">
<img src="assets/libled.jpg" class="fixed-content">
</div>
</div>
</div>
Bootstrap put that padding for you to better align your content, you can remove it by inserting p-0 (padding = 0px) class name as I remember
<div class="container">
<div class="row upperDiv">
<div class="col-md-4 p-0" style="background: #005AA1;">
</div>
<div class="col-md-8 p-0">
<img src="assets/libled.jpg" class="fixed-content">
</div>
</div>
</div>
Looking at your HTML, you are using bootstrap's grid system (hinted by the col-md-X classes). The gap you see in your example is caused by the padding applied to the cells of the grid system to create the gutter.
You have two possibilities:
You put the picture as a background instead, since padding is part of the element, the picture will cover this space too.
You remove the gutter.
1 is pretty self explanatory so I'll go straight to two. You can read about the .no-gutter helper class. It needs to be applied to a row and will effectively remove all gutters for the columns in it. But that means you'll loose the gutter on your left column too. You could also remove the padding with a custom class that sets padding-left:0 !important;padding-right:0 !important; This will effectively remove the gutter for the specified column element.
Whatever the option you choose, remember that cols are not meant to be used directly for the styling. They are here to help you create columns in which to put your visual elements. Although I pointed 3 different approaches to your problem, the only "pure" solution is to use the .no-gutter. Others might have weird visual impacts such as making the gutter effectively only half wide (since the left col participates in half the gutter too) and will not look right if there are other columns near it.

Overflow causing entire page to scroll

I am trying to create a page that doesn't scroll. Certain child elements on the page can scroll, but I'm trying to prevent the page as a whole from scrolling. I have a very nested child element that, when overflowed, receives a scroll bar, but also causes the main document to grow and receive a scroll bar as well.
This is the heart of the issue, but there are a few more nested levels that may be a factor.
<div class="h-100 d-flex flex-column">
<div class="d-flex align-items-center justify-content-center bg-red" style="height: 7%">
</div>
<div class="d-flex align-items-center justify-content-center bg-red" style="height: 3%">
</div>
<div class="bg-green" style="max-height: 75%; height: 75%; overflow-y: auto;">
<div class="bg-gray m-4" style="height: 2000px;">
The height of this content causes BOTH scroll bars to appear. I only want a bar on the
'green section'
</div>
</div>
<div class="bg-red flex-grow-1">
</div>
</div>
This code pen demonstrates how my app is set up. The overflowing element is nested deep within many flex displays (coming from bootstrap 4 utility classes).
https://codepen.io/averyferrante/pen/YMdNpO
I want only the green section from the code pen to scroll, not the entire document to grow/scroll as well.
The problem is that a couple of your containers are missing height definitions. As a result, the children of those containers ignore the percentage heights applied to them.
Add this to your code:
<div class="flex-grow-1" style="height: calc(100% - 48px);">
This height rule gives the container a defined height while compensating for the height of its sibling.
Another height rule was missing three levels down:
<div class="d-flex flex-column w-100" style="height: 100%;">
revised codepen
More detailed explanations:
Working with the CSS height property and percentage values
Chrome / Safari not filling 100% height of flex parent
Did you try playing with position: absolute? You can then set width and height as needed and the red box will see its scrollbar disappear!

Landing Page Built with Bootstrap 4

I have had a landing page built for me which is fairly simple layout. But the problem is the Banner Photo is swamping the page and I have to scroll to see completed page. Is there an adjustment I can make to HTML and/or CSS to reduce the height of the banner photo by about a third?
There are a lot of different approaches of doing this. I'll just show you one, that should perfectly fit your current page and needs.
<div class="col-lg-12 col-md-12 col-sm-12 col-xs-12 d-flex align-items-end overflow-hidden banner-image-container">
<img class="img-responsive" src="img/top-banner.jpg" width="100%">
</div>
(Inside your <style tag:)
.overflow-hidden {
overflow: hidden;
}
.banner-image-container {
max-height: 400px;
}
What I did is to limit the container around your image to a maximum height of 400px. Because your image is bigger then that, I added overflow: hidden; to the container, so it will cut the rest of the image off. Now your main focus in the image will be the building I guess. So I did move it all the way to the top with d-flex align-items-end.

Bootstrap Column in column

This is visual demonstration: Image
I'm trying to put in my laptop column(col-md-8) second column, but when I try, the other one went under the column of the laptop, how can I put a second(col-md-6)column inside a laptop column, and that column laptop still has its full size.
Do you want like this? It's a very short and a messy description you have. So I hope i'm right.
<div class="row">
<div class="col-md-8 col-sm-12">
<div class="row">
<div class="col-md-6 col-sm-6">
Laptop Image
</div>
</div>
</div>
</div>
"col-md-8 col-sm-12" classes will keep your column content as you like in tablet view+desktop view but when it becomes smaller like smartphone view, it will expand to the column to full width and you will still able to see your stuff inside of the laptop column.
Please read the bootstrap documentation from here. Anything else you want quick google will fix your issues or we're here at stackoverflow to help you out. :)
Update
This is what you want isn't it?
https://jsfiddle.net/5jrt314r/2/
Now Whatever goes inside of that .inside class will depend on the laptop image size you have. It will automatically horizontally and vertically center based on the .laptop class you have.
You said you want it responsive so you have to:
Keep your laptop element aspect ratio the same as the image.
Have a screen element that will always fill laptop's screen even if laptop image size changes due to it filling parent element.
If I am right you want this:
HTML:
<div class="row">
<div class="col-xs-8 laptop">
<div class="row">
<div class="col-xs-offset-3 col-xs-9 screen">
This column need to go in laptop screen
</div>
</div>
</div>
</div>
CSS:
.laptop {
background: url('http://devel0p.com/damir/wp-content/themes/helium/images/portofolio/macbook.png');
background-size: 100%;
background-repeat: no-repeat;
/* Padding will keep element aspect ratio so we always show image in it's original aspect ratio */
padding-bottom: 89.32%;
}
.screen {
background: red;
/* Make sure this element is always the size of the screen */
padding-bottom: 64%;
}
I calculated image aspect ratio to be 89.32~% by dividing width by height which is respectively 2084px and 2333px.
Here is a codepen example http://codepen.io/anon/pen/aNqKZL
UPDATE
In the first example .screen element would go beyond laptop screen because of it being stretched by it's content. Here is a version that deals with it http://codepen.io/anon/pen/qZxKRo

Simple CSS MasterPage layout

I'm helpless, tried my best understanding CSS but it's just not for me.
I would like to make a really simple MasterPage:
at the top a div of full width and height 40px (1)
at the bottom also a div of full width and height 40px (2)
in the middle:
on the left: a div of width 200 px (3)
on the right side of the left div: a div with contentPlaceHolder (4)
What I would like to get is: if i make some site that uses my master page and place a panel in the contentPlaceHolder that has width 800px, I would like my site to adjust to it - top, middle and bottom divs to have their width of 1000px (200 + 800). I also wouldn't like (and I have a huge problem with that) the (4) to move down if I resize (shrink) the browser window - I would like all the divs to be blocked.
This is my master page html:
<div>
<div class="header">
</div>
<div>
<div class="links">
</div>
<div class="content">
</div>
</div>
<div class="footer">
</div>
</div>
What kind of CSS do I have to write to make this finally work?
Not sure if you have checked into this or not, but we use the YUI-Grids CSS Framework for our layouts. It keeps us from having to spend a lot of time on CSS, which we are not great at being developers.
There is even a grid builder which will let you graphically layout a page, and then copy and paste the required HTML to make it happen :)
To prevent floated divs from being "squeezed" out of the alignment you want, you usually use either width or min-width.
For example, in this code the div containing the links and content will never be smaller than 1000 pixels. If the screen is smaller than 1000 pixels, a scrollbar is displayed.
<div style="min-width: 1000px">
<div class="links"></div>
<div class="content"></div>
</div>
You could also use width instead of min-width:
<div style="width: 1000px">
<div class="links"></div>
<div class="content"></div>
</div>
The difference between the two is simple: if you specify min-width, the div CAN grow to be larger if it needs to. If you specify width, the div will be exactly the size you specified.
Be aware that min-width is not supported by IE6.
Here's a quick stab at specific CSS/Markup for this problem.
Markup:
<!-- Header, etc. -->
<div class="contentView">
<div class="links">
</div>
<div class="content">
</div>
</div>
<!-- Footer, etc. -->
CSS:
.contentView {
/* Causes absolutely positioned children to be positioned relative to this object */
position: relative;
}
.links {
position: absolute;
top: 0;
left: 0;
width: 200px;
}
.content {
padding-left: 200px;
}
You might want your footer to be "sticky." Check here for information on that: http://ryanfait.com/resources/footer-stick-to-bottom-of-page/
How appropriate this is depends on precisely what the design calls for. This makes the links section more of a floating box on the left than a column for example.
This ends up looking like this (.content is green, .links is red):