CSS

Mega Menu using CSS only

css — Sat, 09 Jan 2021 12:51:47 +0000

Demo : https://css.co.in/examples/mega-menu.html

Code : https://gist.github.com/anjanesh/876b781b69fff9598fd73ffeda4b9318

Sorry for no explanation here.

#top-menu-1 > div > a + div:hover has to be displayed as block too.

For people who know CSS, I think most people just want to copy-paste code and edit for customization. And people who don’t know CSS will just edit the content.

Using ::marker to display content before content

css — Sun, 01 Nov 2020 06:39:48 +0000

Ever wanted a piece of content before the content ?

Well …. there is ::before which is what it is used for.

But there is another selector called ::marker which is used for displaying content before a list item.

It is possible to display a non-list item as an item via display: list-item; to a div or p, so you don’t necessarily have to create a list like ul or ol.

According to Mozilla, Only certain CSS properties can be used in a rule with ::marker as a selector and one of them is content which can be used to insert custom content.

What is not possible is, to absolute position the content in the marker as it’s not supported till now. So for now, we have to do with the left alignment with the text.






Marker





            
        Lorem ipsum dolor sit amet consectetur adipisicing elit. Ipsa, reprehenderit. Tenetur delectus repellendus eligendi fugit neque nulla adipisci tempora quam, error tempore repellat quibusdam esse officiis consequuntur vel nobis optio?
        Lorem ipsum dolor sit amet consectetur adipisicing elit. Ipsa, reprehenderit. Tenetur delectus repellendus eligendi fugit neque nulla adipisci tempora quam, error tempore repellat quibusdam esse officiis consequuntur vel nobis optio?

Using the data URI scheme to reduce an HTTP request

css — Sat, 01 Jan 2011 04:08:50 +0000

Ever wanted to include a 1px wide/high background image that repeats (one way), to your existing sprite image just to reduce that one HTTP request, even though it may not have that great an impact on speed ?

Since the image repeats itself (repeat-x or repeat-y, not both-ways), embedding it to a sprite is only useful if image’s width/height spans across the sprite image.
Using the data URI scheme, its possible to embed an image into a background-image property directly. This is supported by almost all browsers except IE7 and below. (Use this to convert an image to base64 format)

This is normally not a good solution because the base64 encoded string of the image is more (1/3 more) in bytes than the image file itself. But for small images that, say, act as a backrgound image for a navigation container, its a good trade-off for that additional HTTP request.
And for IE6 & IE7, use the image itself.

style.css

.nav
{
    background-image:url('data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAAiCAYAAACeLbMRAAAAAXNSR0IArs4c6QAAAAZiS0dEAP8A/wD/oL2nkwAAAAlwSFlzAAALEwAACxMBAJqcGAAAAAd0SU1FB9oMHw4JJ8ytHAkAAAAhSURBVAjXY2DABYyMjP4zMTAwMFCJ+Pr1K4k6GBkZkbgApdoEsBPcDsAAAAAASUVORK5CYII%3D');
}

HTML page

ie67.css

.nav
{
    background-image:url(images/nav-bg.png);
}

FireFox Specific CSS

css — Sat, 04 Dec 2010 08:08:17 +0000

Though the chances of wanting this is pretty slim, but if you want to target a set of CSS attributes just for FireFox instead of using JavaScript to alter the styles, its possible.
Though most -moz- properties get deprecated & later removed, when the official CSS3 one is implemented, the @-moz-document is Mozilla/Gecko-only specific which is used to contain different styles rules based on filtering document URLs.






FireFox Specific CSS



Hello
World

Example : Mozilla Extensions

Adjusting styles based on a language

css — Fri, 26 Nov 2010 16:40:14 +0000

Traditionally, language HTML files would be stored separately and load language specific CSS files.
But now we just store the language strings separately and programmatically print the language strings within the same HTML file.
Very often I find myself adjusting the style attributes a little here and there for different languages just so that it fits nicely inside a container or a navigation bar and looks the same across all languages.
Its actually easy to set style attributes based on the language attribute, lang in the HTML element.









The quick brown fox jumps over the lazy dog

This Example doesn’t change the text colour using JavaScript. JavaScript was used to change the lang attribute value in the html element.

CSS only Tabs using :target

css — Fri, 15 Oct 2010 12:30:00 +0000

Its highly unlikely that tabs using only CSS would replace JavaScript based ones.






CSS Tabs




    
    
        Tab 1
        Tab Content 1
    
    
        Tab 2
        Tab Content 2
    
    
        Tab 3
        Tab Content 3
    
    
        Tab 4
        Tab Content 4

I think its safe to say that its a real annoyance when the browser re-positions the page when a fragment (named anchor) link is clicked. We don’t want the page moving up on clicking on a tab button. Example.

Preventing Images From Being Saved on Right-Click

css — Fri, 08 Oct 2010 01:09:08 +0000

More often than not, people have asked that if they uploaded their profile picture online, would it be possible to disable downloading of their profile photo by others.

There is no full-proof method of preventing images from being saved by the end user.
The user can hit print-screen and crop the image out of the screenshot, or can directly download the image by knowing the exact image URL from the page’s source code (HTML, CSS JavaScript) or using tools like FireBug, AdBlockPlus to extract the image URL.

Whats mentioned here is a simple common technique to prevent someone from saving the actual image by right-clicking on it & Save As or Get Image Location.

Set the image’s src attribute to a 1 pixel transparent gif
Set the image’s backgound-image property to the actual image you want it to show

All Star Attributes for HTML5 elements in IE

css — Tue, 28 Sep 2010 13:07:43 +0000

It is very common to set margin:0 and padding:0 as default to all HTML elements via the star hack.

* { margin:0; padding:0; }

And we get so used to explicitly setting margins and paddings to elements that require them, that we assume no padding & margins at all as default for all elements.

With html5shiv javascript, we can get most HTML5 functionality working in Internet Explorer (6,7,8). And with ie7-js, we can get IE (6,7,8) to behave more-or-less like IE9.
When using HTML5 elements such as header, section, footer, aside, nav, article & figure, the all star hack doesn’t work and hence we need to set them explicitly. (Looks like ie7-js is resetting the margins)

IE6 / IE7 :

IE8 :

margin:0 isn’t applied in IE 6/7/8. So don’t forget to set it explicitly for HTML5 elements.

header, section, footer, aside, nav, article, figure { display:block; margin:0; padding:0; }

Centering Lists

css — Tue, 18 May 2010 10:19:43 +0000

One of the most common techniques for creating a menu or some sort of a navigational bar is by using a list. A list is well-structured, uses fewer elements to parse than a table (buzzword tableless) and can always fall back to normal HTML when CSS or JavaScript is used to manipulate it for effects. (i.e, degrade gracefully)

This is probably the easiest way to center.






Centering Lists





Menu 1
Menu 2
Menu 3
Menu 4
Menu 5

But this has some drawbacks.

text-align

is meant for aligning text, not block elements, but this works for centering inline blocks on all browsers. But now, all text nodes within all child blocks inherits this text-align alignment property.
height

Because the list and list items are inline, there is no room for adusting or specifying the height of the menu items. height, padding-top, padding-bottom won’t have any effect.

A workaround for inline is by treating the list as a table and the list items as table-cells. But Internet Explorer supports display:table and display:table-cell only from version 8 onwards. So this is a no no solution for IE 6 & IE 7. See the display declaration






Centering Lists





Menu 1
Menu 2
Menu 3
Menu 4
Menu 5

A better option would be float the elements and specify exact widths. This works nicely when you know the exact content and can specify the width of each element.






Centering Lists






1
2
Menu Item 3
4
5

For a fully floating list with centering, applying display:inline-block to the list is enough to achieve the desired result. But according to Quirksmode, inline-block is incomplete in IE6 and IE7. I don’t know how incomplete works, but it wierdly seems to work in IE6 when added in IE conditional statements.

Full HTML :






Centering Lists






1
2
Menu Item 3
4
5

And using HTML5’s nav element :






Centering Lists







1
2
Menu Item 3
4
5

CSS

Mega Menu using CSS only

Using ::marker to display content before content

Using the data URI scheme to reduce an HTTP request

FireFox Specific CSS

Hello

World

Related Links :

Adjusting styles based on a language

The quick brown fox jumps over the lazy dog

CSS only Tabs using :target

Preventing Images From Being Saved on Right-Click

All Star Attributes for HTML5 elements in IE

Centering Lists

text-align

height