Welcome!

Machine Learning Authors: Jack Jachner, Liz McMillan, Kevin Benedict, Leon Adato, Pat Romanski

Related Topics: Machine Learning

Machine Learning : Article

Adding Rounded Corners to HTML with CSS

Using the Border Radius Setting in CSS 3

As the name implies, a Cascading Style Sheet, or CSS, is a document that describes the visual style of your content. Web designers have been leveraging Cascading Styles Sheets as a tool to control content placement and text presentation in web pages for over ten years.

With the advent of Web 2.0 applications, it is even more important to add control to your designs. The Webkit open source project, used in Apple’s Safari and Google’s Chrome, and Mozilla’s FireFox, recognize that CSS must be flexible enough to meet your design needs. To this end, there is now included in the latest versions advanced CSS styles. One of these new features is the ability to add rounded corners to objects.

Adding rounded corners is not a new technique for the web. The effect, however, is created through using images and tables to create the illusion of rounded corners. Adding images to the pages ensures that the page takes longer to load and makes modifying the page later more complex.

A simpler approach is to use the proposed Corner-Radius CSS definition that is currently supported in FireFox 3.0, Safari 3.0, Mobile Safari on your iPhone/iPod Touch and Google’s Chrome. The Corner-Radius definition is line you can add to your CSS style. The following HTML code has a style embedded that changes the presentation of the block of text to have rounded corners with a heavy, black outline:

<p style="-moz-border-radius: 10px;-webkit-border-radius: 10px;border: 4px solid #FF0000;">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nam porta, lacus in cursus cursus, justo purus fringilla nisi, quis cursus urna velit vel felis. Nulla ac mi. Phasellus sodales dui vel tortor. Praesent dignissim. Vestibulum vulputate nibh rutrum purus. Nulla ante. Sed porta. Vestibulum commodo, mi nec tincidunt laoreet, urna risus ornare libero, in imperdiet sapien enim vel nisi.</p>

The style description has been highlighted in bold. Your content will now look like this on your Web page:

As you can see, the block of text now has a solid red line with rounded corners. It is this style description that controls the size of the radius, not an image. You can then easily modify the description as shown below:

-moz-border-radius: 10px

-webkit-border-radius: 10px

The standard is currently only in proposal stage and has not been adopted by all Web browsers. For this reason, you need to add two border-radius style descriptions: One, for FireFox (-moz-border-radius); and one for Safari/Chrome (-webkit-border-radius). Changing the value of the border-radius will change the size of the border. For instance:

Border-radius: 15 px

Border-radius:25 px

Border-radius:45 px

As you increase the border radius, you will also have to add additional styles, such as padding, to ensure that your border does not cut through your text as is shown in the example of border-radius:45 px. Here is how you can add padding to manage your style.

<p style="-moz-border-radius: 45px;-webkit-border-radius: 45px;border: 4px solid #FF0000;padding: 12px;">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nam porta, lacus in cursus cursus, justo purus fringilla nisi, quis cursus urna velit vel felis. Nulla ac mi. Phasellus sodales dui vel tortor. Praesent dignissim. Vestibulum vulputate nibh rutrum purus. Nulla ante. Sed porta. Vestibulum commodo, mi nec tincidunt laoreet, urna risus ornare libero, in imperdiet sapien enim vel nisi.</p>

The content now looks like this:

Creating interactive tabs

The new border-radius style also has the option of allowing you to control which corner you want the border to appear on. This can be useful when you want to create tabs for you web page. For instance, the following style will add tabs to the top left and top right corners:

.standardTabEffect{

font-family: Arial, Helvetica, sans-serif;

font-size: 15px;

background-color: #FFFF00;

-moz-border-radius-topleft: 15px;

-moz-border-radius-topright: 15px;

-webkit-border-radius-topleft: 15px;

-webkit-border-radius-topright: 15px;

border: 4px solid #FF0000;

padding: 10px;

color: #FF0000;

text-decoration: none;

font-weight: bold;

}

This style can now be added to a central style sheet link to content on your page. The content on your page can now reference the style. You can add the following HTML to see this effect:

<a class="standardTabEffect" href="#">This is Tab 1</a><a class="standardTabEffect" href="#">This is Tab 2</a><a class="standardTabEffect" href="#">This is Tab 3</a>

When you view the page, the HTML above will look like this:

As you might imagine, you can inherit existing CSS formatting into your border-radius designs. For instance, you can add a simple roll over effect when you include the following style description. The important part is to add the “:hover” parameter. This instructs the Web browser to only use this style when a user is rolling over the link with their mouse:

.standardTabEffect:hover{

background-color: #FF0000;

border: 4px solid #FFFF00;

color: #FFFF00;

}

The action looks like this:

Without using complex images or tables, you have created a series of tabs that can be easily managed through your CSS and HTML.

The Caveat
Applying rounded corners to your design is a must for almost any Web site. There are some caveats, however, to using rounded corners in CSS. The first one is a biggie: NO VERSION OF MICROSOFT’S INTERNET EXPLORER SUPPORTS CSS CORNERS. Microsoft does a good job of talking up their support for CSS, but what they fail to mention is their lack of support for advanced CSS3 standards. Unfortunately, this is a big caveat for many designers at 70% of all Internet users are coming to your site using Internet Explorer.

More Stories By Matthew David

Matthew has written books for Friends of Ed, Pearson Press, New Riders, Wiley, Focal Press and Peach Pit. He is also experience at leading teams top deliver bestselling titles books that come with accompanying video training and media. An example is Flash MX Magic, a book written by 7 authors, with an accompanying web site and CD. The book sold over 45,000 copies in 12 languages. Matthew is also the author of 400+ articles.

Comments (0)

Share your thoughts on this story.

Add your comment
You must be signed in to add a comment. Sign-in | Register

In accordance with our Comment Policy, we encourage comments that are on topic, relevant and to-the-point. We will remove comments that include profanity, personal attacks, racial slurs, threats of violence, or other inappropriate material that violates our Terms and Conditions, and will block users who make repeated violations. We ask all readers to expect diversity of opinion and to treat one another with dignity and respect.


@CloudExpo Stories
IT organizations are moving to the cloud in hopes to approve efficiency, increase agility and save money. Migrating workloads might seem like a simple task, but what many businesses don’t realize is that application migration criteria differs across organizations, making it difficult for architects to arrive at an accurate TCO number. In his session at 21st Cloud Expo, Joe Kinsella, CTO of CloudHealth Technologies, will offer a systematic approach to understanding the TCO of a cloud application...
"With Digital Experience Monitoring what used to be a simple visit to a web page has exploded into app on phones, data from social media feeds, competitive benchmarking - these are all components that are only available because of some type of digital asset," explained Leo Vasiliou, Director of Web Performance Engineering at Catchpoint Systems, in this SYS-CON.tv interview at DevOps Summit at 20th Cloud Expo, held June 6-8, 2017, at the Javits Center in New York City, NY.
SYS-CON Events announced today that Secure Channels, a cybersecurity firm, will exhibit at SYS-CON's 21st International Cloud Expo®, which will take place on Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. Secure Channels, Inc. offers several products and solutions to its many clients, helping them protect critical data from being compromised and access to computer networks from the unauthorized. The company develops comprehensive data encryption security strategie...
SYS-CON Events announced today that App2Cloud will exhibit at SYS-CON's 21st International Cloud Expo®, which will take place on Oct. 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. App2Cloud is an online Platform, specializing in migrating legacy applications to any Cloud Providers (AWS, Azure, Google Cloud).
The goal of Continuous Testing is to shift testing left to find defects earlier and release software faster. This can be achieved by integrating a set of open source functional and performance testing tools in the early stages of your software delivery lifecycle. There is one process that binds all application delivery stages together into one well-orchestrated machine: Continuous Testing. Continuous Testing is the conveyer belt between the Software Factory and production stages. Artifacts are m...
WebRTC is the future of browser-to-browser communications, and continues to make inroads into the traditional, difficult, plug-in web communications world. The 6th WebRTC Summit continues our tradition of delivering the latest and greatest presentations within the world of WebRTC. Topics include voice calling, video chat, P2P file sharing, and use cases that have already leveraged the power and convenience of WebRTC.
Cloud resources, although available in abundance, are inherently volatile. For transactional computing, like ERP and most enterprise software, this is a challenge as transactional integrity and data fidelity is paramount – making it a challenge to create cloud native applications while relying on RDBMS. In his session at 21st Cloud Expo, Claus Jepsen, Chief Architect and Head of Innovation Labs at Unit4, will explore that in order to create distributed and scalable solutions ensuring high availa...
For financial firms, the cloud is going to increasingly become a crucial part of dealing with customers over the next five years and beyond, particularly with the growing use and acceptance of virtual currencies. There are new data storage paradigms on the horizon that will deliver secure solutions for storing and moving sensitive financial data around the world without touching terrestrial networks. In his session at 20th Cloud Expo, Cliff Beek, President of Cloud Constellation Corporation, d...
Enterprise architects are increasingly adopting multi-cloud strategies as they seek to utilize existing data center assets, leverage the advantages of cloud computing and avoid cloud vendor lock-in. This requires a globally aware traffic management strategy that can monitor infrastructure health across data centers and end-user experience globally, while responding to control changes and system specification at the speed of today’s DevOps teams. In his session at 20th Cloud Expo, Josh Gray, Chie...
To get the most out of their data, successful companies are not focusing on queries and data lakes, they are actively integrating analytics into their operations with a data-first application development approach. Real-time adjustments to improve revenues, reduce costs, or mitigate risk rely on applications that minimize latency on a variety of data sources. Jack Norris reviews best practices to show how companies develop, deploy, and dynamically update these applications and how this data-first...
Intelligent Automation is now one of the key business imperatives for CIOs and CISOs impacting all areas of business today. In his session at 21st Cloud Expo, Brian Boeggeman, VP Alliances & Partnerships at Ayehu, will talk about how business value is created and delivered through intelligent automation to today’s enterprises. The open ecosystem platform approach toward Intelligent Automation that Ayehu delivers to the market is core to enabling the creation of the self-driving enterprise.
"We're here to tell the world about our cloud-scale infrastructure that we have at Juniper combined with the world-class security that we put into the cloud," explained Lisa Guess, VP of Systems Engineering at Juniper Networks, in this SYS-CON.tv interview at 20th Cloud Expo, held June 6-8, 2017, at the Javits Center in New York City, NY.
Historically, some banking activities such as trading have been relying heavily on analytics and cutting edge algorithmic tools. The coming of age of powerful data analytics solutions combined with the development of intelligent algorithms have created new opportunities for financial institutions. In his session at 20th Cloud Expo, Sebastien Meunier, Head of Digital for North America at Chappuis Halder & Co., discussed how these tools can be leveraged to develop a lasting competitive advantage ...
"We're a cybersecurity firm that specializes in engineering security solutions both at the software and hardware level. Security cannot be an after-the-fact afterthought, which is what it's become," stated Richard Blech, Chief Executive Officer at Secure Channels, in this SYS-CON.tv interview at @ThingsExpo, held November 1-3, 2016, at the Santa Clara Convention Center in Santa Clara, CA.
In his session at 20th Cloud Expo, Mike Johnston, an infrastructure engineer at Supergiant.io, discussed how to use Kubernetes to set up a SaaS infrastructure for your business. Mike Johnston is an infrastructure engineer at Supergiant.io with over 12 years of experience designing, deploying, and maintaining server and workstation infrastructure at all scales. He has experience with brick and mortar data centers as well as cloud providers like Digital Ocean, Amazon Web Services, and Rackspace. H...
You know you need the cloud, but you’re hesitant to simply dump everything at Amazon since you know that not all workloads are suitable for cloud. You know that you want the kind of ease of use and scalability that you get with public cloud, but your applications are architected in a way that makes the public cloud a non-starter. You’re looking at private cloud solutions based on hyperconverged infrastructure, but you’re concerned with the limits inherent in those technologies.
SYS-CON Events announced today that Massive Networks will exhibit at SYS-CON's 21st International Cloud Expo®, which will take place on Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. Massive Networks mission is simple. To help your business operate seamlessly with fast, reliable, and secure internet and network solutions. Improve your customer's experience with outstanding connections to your cloud.
DevOps is under attack because developers don’t want to mess with infrastructure. They will happily own their code into production, but want to use platforms instead of raw automation. That’s changing the landscape that we understand as DevOps with both architecture concepts (CloudNative) and process redefinition (SRE). Rob Hirschfeld’s recent work in Kubernetes operations has led to the conclusion that containers and related platforms have changed the way we should be thinking about DevOps and...
The question before companies today is not whether to become intelligent, it’s a question of how and how fast. The key is to adopt and deploy an intelligent application strategy while simultaneously preparing to scale that intelligence. In her session at 21st Cloud Expo, Sangeeta Chakraborty, Chief Customer Officer at Ayasdi, will provide a tactical framework to become a truly intelligent enterprise, including how to identify the right applications for AI, how to build a Center of Excellence to ...
From 2013, NTT Communications has been providing cPaaS service, SkyWay. Its customer’s expectations for leveraging WebRTC technology are not only typical real-time communication use cases such as Web conference, remote education, but also IoT use cases such as remote camera monitoring, smart-glass, and robotic. Because of this, NTT Communications has numerous IoT business use-cases that its customers are developing on top of PaaS. WebRTC will lead IoT businesses to be more innovative and address...