CSS Float behaviour (even after checking W3C) - html

I have an issue with float and have included the sample code below. I am trying to create a two column layout: I know how to do this a number of other ways so this question is with a view to finding out why FLOAT behaves the way it does here.
The container DIV has two DIVs, both are floated left.
As expected, the size of the browser window determines whether or not the second floated block level element will go alongside or under the first floated element.
The problem arises with the length of the content in the second floated DIV (assume the browser window is maximized, at whatever resolution).
In the code below, I have commented out part of the second paragraph. On my browser this is the cut off mark: including any content after this causes the whole DIV to clear the first DIV, even though there is a lot of space left in the second DIV before it should need to clear the first DIV.
I cannot see anything in the code that should cause this to happen. I am aware of how float behaves in terms of block level and inline content and the consequences of placing non-floated blocks beside floated ones, but I cannot find anything in the documentation to explain why the block should clear when there seems to be sufficient room for its content.
Help much appreciated.
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html lang="en">
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8">
<title>CSS Float Problem</title>
<style>
body {
background:#5c604e;
}
#container {
position:relative;
background:yellow;
}
p {
background-color:#cccccc;
width:50%;
}
.block {
width: 200px;
height: 200px;
}
.float {
float: left;
}
.pink {
background: #ee3e64;
}
.blue {
background: #44accf;
}
</style>
</head>
<body>
<div id="container">
<div class="block pink float">Lorem ipsum dolor sit amet consectetuer Nam fringilla Vestibulum massa nisl. Nulla adipiscing ut urna ipsum Curabitur urna lacinia pretium feugiat Ut.
</div>
<div class="blue float"> <h2>Test Heading</h2>
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Curabitur bibendum erat a neque eleifend vitae ultrices nisi tempor. Praesent facilisis lobortis nisl, <!--sit amet gravida orci mollis vitae. Maecenas porta turpis id urna porta id ornare velit dapibus. <!-- Proin sollicitudin, tortor viverra posuere mattis, nisl est rhoncus urna, nec elementum augue turpis vitae diam. Pellentesque ut quam sit amet elit tempus suscipit nec vel nulla. Proin ullamcorper sollicitudin metus in posuere. Aliquam a vehicula odio. Morbi scelerisque arcu ac nibh cursus ullamcorper. Aliquam pulvinar commodo nunc nec laoreet. -->
</p>
</div>
</div><!--end of container div -->
</body>
</html>
See it at http://cssdesk.com/86cPH

In your example, you have two block-level element floated next to each-other. Because they're block-level, they establish a new containing context in which their contents will live and affect layout.
The standard behaviour when calculating box sizes for floated elements is to base it on the contents of the element. Because your second floated box doesn't have an explicit width, the browser determines that its width should be based on its contents, which in the case of the floated element is going to be as wide as its contents can feasibly be.
Thus, the second box flows underneath the first because the intrinsic width of the paragraph affects the blue box, which is larger than the allotted explicit constraints of its container (i.e., the width of #container minus the width of the first floated element).
If you wanted the text to flow around the floated element, you should omit the "blue" box. Only when the float and the contents are nested in the same container (and the content isn't a block-level element) will the content then flow around the pink box as one might expect.
As far as getting a working two-column layout with equal-height columns, I'd recommend trying display: table if you don't need to support IE7.

What you want to achieve? you haven't fixed the width of second block and so its width is going mad with the content length.
Give it a fixed width.
If you want that rest width is covered by it then try this.
.block1 {
width:20%;
}
.block2 {
width:80%;
}
and in html
<div class="block1 pink float"> ..content.. </div><
div class="block2 blue float"> ..whatever content.. </div>
remember there should be no space between closing div of left block and opening div of right block else whitespace between them will cause them to stacked over one another

Related

Apply css only on the wrapped part of text

I have an HTML component that has an image floating to the left and text on the right. When the text's height is larger than the image, the text will wrap to the left. I want to add some padding between the image and the wrapped text. I could add a bottom padding to the image, but I don't want the padding to show up when the text is not wrapped. Here is what the component should look like when the text is no wrapped. The image should not have a bottom padding:
Here is what it should look like when the text is wrapped. There should be some padding between the image and the wrapped text:
Is there a way to do this through css?
An idea in case the image height is fixed or known:
.container {
border:2px solid;
min-height:200px; /* same as image height */
font-size:19px;
}
.container img {
float:left;
margin:0 20px 20px 0;
}
<div class="container">
<img src="https://picsum.photos/id/1014/200/200" > Lorem ipsum dolor sit amet, consectetur adipiscing elit. Pellentesque fermentum quis mi vitae molestie. Sed scelerisque fringilla interdum. Duis ac purus nisl. Nulla vehicula vehicula turpis id convallis. Etiam nec nisl nibh. Mauris lorem mauris, vehicula nec massa in, accumsan egestas eros. Integer vehicula nulla sed enim laoreet maximus. Vestibulum at interdum sem. Sed interdum volutpat massa,
</div>
Yes, you can do it. Follow this example for HTML and css.
body {
margin: 20px;
text-align: center;
}
img {
float: left;
margin: 0px 10px 5px 10px;
}
p {
text-align: justify;
font-size: 20px;
}
<!DOCTYPE html>
<html>
<head>
<title>
Wraping an Image with the text
</title>
</head>
<body>
<div class="square">
<div>
<img src= "https://upload.wikimedia.org/wikipedia/commons/thumb/b/b6/Image_created_with_a_mobile_phone.png/1024px-Image_created_with_a_mobile_phone.png" alt="Longtail boat in Thailand" width="300px">
</div>
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</div>
</body>
</html>

How to create self-contained borders in HTML?

I have
<div id="aboutPyKov">
<h2 id="pyKovSubheading">About PyKov</h2>
<p id="pyKovIs">Lorem ipsum dolor sit amet,<br/>consectetur
adipiscing elit.<br/>Vestibulum congue mattis odio.<br/>Nulla f
acilisi. Quisque tempus<br/>varius enim, quis mattis metus,
<br/>auctor quis. Lorem ipsum dolor sit<br/>amet, consectetur
adipiscing elit.<br/>Pellentesque a euismod sem, a<br/>convallis
turpis. Donec aliquet<br/>quis leo at fermentum. Maecenas<br/>ut
lacinia magna. Maecenas gravida<br/>interdum turpis non
fermentum.</p>
</div>
For styling, I have
#aboutPyKov {
border: 8px dotted rgba(255,198,107,0.93);
border-radius: 20px;
}
This works fine, however it shows a dotted border around the whole width of the whole page. I want it to be self-contained, but instead, it goes around the whole screen as you can see in this picture. How do I make it so it only goes around the text? Also, the top border is hugging the background color above it. I would also like to know how to change that.
This is CSS level 1: block and inline. Block elements take up 100% of available width unless you set them to float or set an explicit width. Either set the border to the paragraph element or set a width to your div.
Try adding padding = 0px" to your <p> tag and <h2> tag,
p, h2 {
padding: 0px;
}
because <p> and <h2> tags have default padding applied.
Just change the display attribute
#aboutPyKov {
border: 8px dotted rgba(255,198,107,0.93);
border-radius: 20px;
display:inline-block; // just change the display
}

What defines the width of my div element?

CSS. Never my strong point!
Consider the following styling:
.popupComponentContent{
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%,-50%);
padding: 16px;
max-height:100vh;
max-width:100vw;
box-sizing:border-box;
background-color:white;
box-shadow: 2px 2px 5px 4px rgba(0,0,0,0.5);
overflow:auto;
}
noting that there are no specific rules for the width or the height of the targeted element.
Let's apply this styling to the following markup:
<div class="popupComponentContent" >
<p>
This is a popup!
</p>
</div>
And the outer div fits nicely around the content. See example on codepen right here.
Now, instead, let's apply it to this markup:
<div class="popupComponentContent" >
<p>
This is a popup!
</p>
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Vivamus gravida eget
dolor a interdum. Donec placerat turpis ac lacinia rhoncus. Cras urna magna,
imperdiet ut imperdiet ultrices, euismod non elit. Proin vel metus pretium,
bibendum tortor vel, congue quam. Sed ultrices lacus quam, nec porttitor
mi scelerisque eget. Praesent accumsan varius leo nec tincidunt. Maecenas
viverra ultricies purus quis rutrum.</p>
</div>
...ensuring that we have enough content to cover the width of the viewport. See example on codepen right here.
Why is the div in the second example half the width of the screen? What makes that happen? Why doesn't it extend to the full width of the screen?
You've applied .popupComponentContent to a div which is a block element. It covers 100% of the screen (parent element) unless a width is specified.
In .popupComponentContent, you use left: 50%. This doesn't actually position the element at where it supposed to be since the element is a block with no width specified. It basically shrinks the div. Right side of the div is snapped to right. left: 50% just moves the left side of the div to 50%, so you get 50% width for your div.
If you want to move your div to left: 50% while preserving its default width (which is 100%), you should apply display:table on the div.
So I'd say display:block on the div defines the width.
You can remove the transform attribute to understand it. If you do that you'll see the width of the element fits with the remaining space between left: 50% and the right side.
So you can play with this left attribute to adjust the maximum width for your popup (as well as adjusting the transform to keep it centered).
Take a look on flexbox, it can help you to improve this.
Removing the transform line and the left line will make it display full width.
As it is, it covers only 50 percent because left: 50%; bumps the left margin halfway across the window, then transform: translate(-50%, -50%); bumps the whole element back across the window the other way.

Will the browser parse / pre-render / paint display:none HTML?

I want to prevent the browser from doing the work to parse and pre-render or paint some "hidden" HTML until I'm ready to show it, so that I can quickly display a minimal set of content, having the browser only do the work the render the visible pieces.
I'm looking for maximum render/paint speed of initial page load.
My current HTML:
<div id="stuff">
<div class="item">
<div class="visible">
<h1>Item 1</h1>
<a class="details" href="javascript:void(0)">Show more</a>
</div>
<div class="invisible">
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Aenean elit mi, bibendum a imperdiet sed, imperdiet id leo. Mauris vulputate tellus id metus euismod, eget gravida libero ultricies.</p>
<img src="/img/1.jpg" alt="" />
</div>
</div>
<div class="item">
<div class="visible">
<h1>Item 2</h1>
<a class="details" href="javascript:void(0)">Show more</a>
</div>
<div class="invisible">
<p>Vestibulum tristique fermentum dui, et pretium elit. Ut purus lacus, mattis vitae leo vel, congue mollis mi. Aliquam erat volutpat. Vestibulum luctus, purus ut mattis ullamcorper, justo odio ultrices dolor, nec porta purus turpis sed orci. Aliquam orci sapien, dictum sed facilisis molestie, tempus in orci.</p>
<img src="/img/2.jpg" alt="" />
</div>
</div>
... and so on...
</div>
The actual "invisible" content is MUCH more significant than in this example, and there are 50 "items" per page.
My external CSS:
.invisible {
display: none;
}
Will display: none in an external stylesheet prevent the browser from pre-rendering the hidden content?
Is there a better way to do what I want? Should I put an inline style="display:none" on the div instead?
Thanks!
display: none will not prevent the browser from parsing/loading that markup and associated resources (EDIT by Steven Moseley: tested this and found that display:none will actually prevent the browser from painting the HTML, i.e. applying CSS to the elements inside the hidden div, and will only do the work to parse the HTML to construct the DOM, which will in fact give a performance advantage). It is simply not rendered as part of the page flow until its display value changes. Generally speaking display: none and visibility: hidden have little or no impact on page load time. The main venue for optimization / performance with display: none involves selectively choosing when to display it since that triggers a reflow/rerender of page content, and even that is usually a negligible difference in all but very complex applications.
If you want to wait to load the content until it's needed, don't include it at all (or include empty div placeholders) and then use AJAX to fetch the content from the server once it's needed after page load and add it to the page with JS. jQuery makes this very simple with its built in AJAX functions.
Can you avoid building the invisible HTML in the first place? Are you going to at some point set .invisible { display: block }?.
I've found display: none isn't as wonderful for performance as you'd expect. You're better off only adding the extra elements to the screen when your user needs them, with infinite scrolling or pagination.
Try and avoid putting HTML into the page if it's not going to be viewed, and just add what you need in 1 go to minimize DOM manipulation.
Is it likely a user will look at all 50 items per page?

CSS: Align image right bottom of a div filled with text

I'm making myself a website but I'm a little stuck on an issue I am having.
Inside a div I have a block of text with variable height.
At the right side of the text I want to position an image width a variable width & height. It has to be aligned to the bottom
Above the image may not come any text.
It needs to be like this: https://www.dropbox.com/s/pqpttrvefrvci52/example.jpg
Here is the code I'm currently having:
HTML:
<div id="section">
<div id="image">
<img src="example.jpg" alt="image"/>
</div>
<p>
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nullam congue, nisl et facilisis commodo, sem tortor suscipit massa, nec rutrum eros nunc et orci.
Maecenas nibh erat, pulvinar sed aliquam at, malesuada nec nibh.Curabitur fringilla justo odio. Aenean tristique consequat lorem vel tincidunt.
</p>
</div>
CSS
#section {
position: relative;
}
#image {
float: right;
margin-left: 20px;
position: absolute;
bottom: o;
right: 0;
}
With this code the image is aligned to the bottom right corner of the div, but the height of the div is lower then the height of the image.
Also the text just goes through the image.
you need a couple of things to fix this.
1) add padding-right to the section so it does not overlap with the image.
#section {
position: relative;
padding-right:<at least image width so the text doesn't overlap>
}
2) when you add a div and float in it, the float remove the image from the flow of the document so you need to add another internal div with the same height or make the height of the div the same height as your image or just add a floater div..
<div id="image">
<img src="example.jpg" alt="image"/>
</div>
<div style="clear:both"></div>
</div>
Here is a working solution: http://jsfiddle.net/zV3wm/
I can think of a way with variable image widths and text amounts, but it requires some duplication in the markup.
The gist is that you right-float a hidden version of the image, and then use overflow:hidden so that the paragraph against the float doesn't flow under it. Then, we use absolute positioning to place the non-hidden version of the image at the bottom of the container.
I have prepared a mockup at http://jsfiddle.net/UmGNZ/ (I have given the hidden image partial opacity, so you can see where it's being added to the document), but for a pseudo-HTML example:
<container with position:relative>
<right-float>
<hidden img tag with opacity: 0 />
<actual img tag with absolute positioning, bottom: 0, right: 0 />
</right-float>
<p with overflow:hidden (or auto) />
</container>
You could also try a pure CSS solution using CSS tables if you don't have to support IE7, but otherwise this should work down to IE6 if you use visibility:hidden in favour of opacity, and add a zoom:1 to the paragraph style.
This idea which allows a flexible image size: http://jsfiddle.net/David_Knowles/F3zZU/4/
.cell {display:table-cell;}
#section {
position: relative;
width:300px;
}
#image {
vertical-align: bottom;
}
<div id="section">
<div class="cell">
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nullam congue, nisl et facilisis commodo, sem tortor suscipit massa, nec rutrum eros nunc et orci.Maecenas nibh erat, pulvinar sed aliquam at, malesuada nec nibh.Curabitur fringilla justo odio. Aenean tristique consequat lorem vel tincidunt.</p>
</div>
<div id="image" class="cell">
<img src="http://placeimg.com/120/80/any" alt="image"/>
</div>
</div>
I dont thing I am correct but you can achieve that by float right and margin-top.
#img {
float: right;
margin-top: -140px;
}
Check this out: http://jsfiddle.net/wrujx/
I think best solution is to use a little bit of jQuery (JavaScript) and let each part do its job keeping it as simple as possible. Here's what you'd have:
HTML
<div id="wrapper">
<p>yourtexthere</p>
<img src="whatever.jpg"/>
</div>
CSS
#wrapper{
width:600px;
border:1px solid #000000;
}
p{
display:inline-block;
margin-right:20px;
}
img{
vertical-align:bottom;
}
jQuery
var parentWidth = $('#wrapper').width()
var imgWidth = $('img').width()
$('p').width((parentWidth - imgWidth) - 20)
And there you go plain and simple without extra tags and messy positioning.