When combined with data on prescriptions filled at local pharmacies, EMS drug overdose calls, and drug seizures by law enforcement, wastewater testing can yield insights into the extent of black-market activity, policing impact on community drug use, and where and when drug overdoses might occur.

The authors developed a mathematical model based on a cost-of-illness approach to estimate the impacts of exposure to untreated PMADs on mothers and children.

Online Resource

Dewey Library - QH84.5.C67 2019

Eric Meyer gift wraps the most awkwardly shaped of boxes using nothing but CSS, HTML and a little curl of ribbon. No matter how well you plan and how much paper you have at your disposal, sometimes you just need to slant the gift to the side.

We have a lot of new layout tools at our disposal these days—flexbox is finally stable and interoperable, and Grid very much the same, with both technologies having well over 90% support coverage. In that light, we might think there’s no place for old tricks like negative margins, but I recently discovered otherwise.

Over at An Event Apart, we’ve been updating some of our landing pages, and our designer thought it would be interesting to have slanted images of speakers at the tops of pages. The end result looks like this.

The interesting part is the images. I wanted to set up a structure like the following, so that it will be easy to change speakers from time to time while preserving accessible content structures:

<div id="page-top">
  <ul class="monoliths">
    <li>
      <a href="https://aneventapart.com/speakers/rachel-andrew"> 
        <img src="/img/rachel-andrew.jpg" alt=""> 
        <div> 
          <strong>Rachel Andrew</strong> CSS Grid 
        </div> 
      </a>
    </li>
    <li>
      <a href="https://aneventapart.com/speakers/derek-featherstone"> 
        <img src="/img/derek-featherstone.jpg" alt=""> 
        <div> 
          <strong>Derek Featherstone</strong> Accessibility 
        </div> 
      </a>
    </li>
    <li>
      …
    </li>
    <li>
      …
    </li>
  </ul>
</div>

The id value for the div is straightforward enough, and I called the ul element monoliths because it reminded me of the memorial monoliths at the entrance to EPCOT in Florida. I’m also taking advantage of the now-ubiquitous ability to wrap multiple elements, including block elements, in a hyperlink. That way I can shove the image and text structures in there, and make the entire image and text below it one link.

Structure is easy, though. Can we make that layout fully responsive? I wondered. Yes we can. Here’s the target layout, stripped of the navbar and promo copy.

So let’s start from the beginning. The div gets some color and text styling, and the monoliths list is set to flex. The images are in a single line, after all, and I want them to be flexible for responsive reasons, so flexbox is 100% the right tool for this particular job.

#page-top { 
  background: #000; 
  color: #FFF; 
  line-height: 1; 
} 
#page-top .monoliths { 
  display: flex; 
  padding-bottom: 1em; 
  overflow: hidden; 
}

I also figured, let’s give the images a simple basis for sizing, and set up the hyperlink while we’re at it.

#page-top .monoliths li { 
  width: 25%; 
} 
#page-top .monoliths a { 
  color: inherit; 
  text-decoration: inherit; 
  display: block; 
  padding: 1px; 
}

So now the list items are 25% wide—I can say that because I know there will be four of them—and the links pick up the foreground color from their parent element. They’re also set to generate a block box.

At this point, I could concentrate on the images. They need to be as wide as their parent element, but no wider, and also match height. While I was at it, I figured I’d create a little bit of space above and below the captioning text, and make the strong elements containing speakers’ names generate a block box.

#page-top .monoliths img { 
  display: block; 
  height: 33rem; 
  width: 100%; 
} 
#page-top .monoliths div { 
  padding: 0.5em 0; 
} 
#page-top .monoliths strong { 
  display: block; 
  font-weight: 900; 
}

It looks like the speakers were all cast into the Phantom Zone or something, so that needs to be fixed. I can’t physically crop the images to be the “correct” size, because there is no correct size: this needs to work across all screen widths. So rather than try to swap carefully-sized images in and out at various breakpoints, or complicate the structure with a wrapper element set to suppress overflow of resized images, I turned to object-fit.

#page-top .monoliths img { 
  display: block; 
  height: 33rem; 
  width: 100%; 
  object-fit: cover; 
  object-position: 50% 20%; 
}

If you’ve never used object-fit, it’s a bit like background-size. You can use it to resize image content within the image’s element box without creating distortions. Here, I set the fit sizing to cover, which means all of the img element’s element box will be covered by image content. In this case, it’s like zooming in on the image content. I also set a zooming origin with object-position, figuring that 50% across and 20% down would be in the vicinity of a speaker’s face, given the way pictures of people are usually taken.

This is fairly presentable as-is—a little basic, perhaps, but it would be fine to layer the navbar and promo copy back over it with Grid or whatever, and call it a day. But it’s too square and boxy. We must go further!

To make that happen, I’m going to take out the third and fourth images temporarily, so we can see more clearly how the next part works. That will leave us with Rachel and Derek.

The idea here is to clip the images to be slanted, and then pull them close to each other so they have just a little space between them. The first part is managed with clip-path, but we don’t want to pull the images together unless their shapes are being clipped. So we set up a feature query.

@supports (clip-path: polygon(0 0)) or (-webkit-clip-path: polygon(0 0)) { 
  #page-top .monoliths li { 
    width: 37.5%; 
  } 
}

I decided to test for both the un-prefixed and WebKit-prefixed versions of clip-path because Safari still requires the prefix, and I couldn’t think of a good reason to penalize Safari’s users for the slowness of its standards advancement. Then I made the images wider, taking them from 25% to 37.5%, which makes them half again as wide.

Thanks to object fitting, the images don’t distort when I change their parent’s width; they just get wider and scale up the contents to fit. And now, it is time for clipping!

@supports (clip-path: polygon(0 0)) or (-webkit-clip-path: polygon(0 0)) { 
  #page-top .monoliths li { 
    width: 37.5%; 
    -webkit-clip-path: polygon(25% 0, 100% 0, 75% 100%, 0 100%); 
    clip-path: polygon(25% 0, 100% 0, 75% 100%, 0 100%); 
  } 
}

Each coordinate pair in the polygon() is like the position pairs in background-position or object-position: the horizontal distance first, followed by the vertical distance. So the first point in the polygon is 25% 0, which is 25% of the way across the element box, and no distance down, so right at the top edge. 100% 0 is the top right corner. 75% 100% is on the bottom edge, three-quarters of the way across the element, and 0 100% is the bottom left corner. That creates a polygon that’s a strip three-quarters the full width of the element box, and runs from bottom left to top right.

Now we just have to pull them together, and this is where old tricks come back into play: all we need is a negative right margin to bring them closer together.

#page-top .monoliths li { 
  width: 37.5%; 
  margin-right: -7.5%; 
  -webkit-clip-path: polygon(25% 0, 100% 0, 75% 100%, 0 100%); 
  clip-path: polygon(25% 0, 100% 0, 75% 100%, 0 100%); 
}

The separation between them is a little wider than we were originally aiming for, but let’s see what happens when we add the other two images back in and let flexbox do its resizing magic.

Notice how the slants actually change shape as the screen gets narrower or wider. This is because they’re still three-quarters the width of the image element’s box, but the width of that box is changing as the screen width changes. That means at narrow widths, the slant is much steeper, whereas at wide widths, the slant is more shallow. But since the clipping path’s coordinates were all set with percentage distances, they all stay parallel to each other while being completely responsive to changes in screen size. An absolute measure like pixels would have failed.

But how did the images get closer together just by adding in two more? Because the list items’ basic sizing added up to more than 100%, and they’re all set to flex-shrink: 1. No, you didn’t miss a line in the CSS: 1 is the default value for flex-shrink. Flex items will shrink by default, which after all is what we should expect from a flexible element. If you want to know how much they shrunk, and why, here’s what Firefox’s flex inspector reports.

When there were only two list items, there was space enough for both to be at their base size, with no shrinkage. Once we went to four list items, there wasn’t enough space, so they all shrank down. At that point, having a negative right margin of -7.5% was just right to pull them together to act as a unit.

So, now they’re all nicely nestled together, and fully responsive! The captions need a little work, though. Notice how they’re clipped off a bit on the left edge, and can be very much clipped off on the right side at narrower screen widths? This happens because the li elements are being clipped, and that clipping applies to all their contents, images and text alike. And we can’t use overflow to alter this: clipped is clipped, not overflowed.

Fortunately, all we really need to do is push the text over a small amount. Inside the feature query, I added:

#page-top .monoliths div { 
  padding-left: 2%;
  padding-right: 26%; 
}

This shifts the text just a bit rightward, enough to clear the clip path. On the right side, I padded the div boxes so their contents wouldn’t fall outside the clipped area and appear to slide under the next caption. We could also use margins here, but I didn’t for reasons I’ll make clear at the end.

At the last minute, I decided to make the text at least appear to follow the slants of the images. For that, I just needed to shift the first line over a bit, which I did with a bit more padding.

#page-top .monoliths strong { 
  padding-left: 1%; 
}

That’s all to the good, but you may have noticed the captions still overlap at really narrow screen widths. There are a lot of options here, from stacking the images atop one another to reverting to normal flow, but I decided to just hide the captions if things got too narrow. It reduces clutter without sacrificing too much in the way of content, and by leaving them still technically visible, they seem to remain accessible.

@media (max-width: 35rem) { 
  #page-top .monoliths div { 
    opacity: 0.01 
  } 
}

And that, as they say, is that! Fully responsive slanted images with text, in an accessible markup structure. I dig it.

I did fiddle around with the separations a bit, and found that a nice thin separator occurred around margin-right: -8%, whereas beefier ones could be found above -7%. And if you crank the negative margin value to something beyond -8%, you’ll make the images overlap entirely, no visible separation—which can be a useful effect in its own right.

I promised to say why I used padding for the caption text div rather than margins. Here’s why.

#page-top .monoliths div { 
  padding-left: 3%; 
  padding-right: 26%; 
  border-top: 2px solid transparent; 
  background: linear-gradient(100deg,hsl(292deg,50%,50%) 50%, transparent 85%); 
  background-clip: padding-box; 
}

It required a wee bit more padding on the left to look decent, and an alteration to the background clipping box in order to keep the purple from filling the transparent border area, but the end result is pretty nifty, if I do say so myself. Alternatively, we could drop the background gradient on the captions and put one in the background, with a result like this.

I have no doubt this technique could be extended, made more powerful, and generally improved upon. I really wished for subgrid support in Chrome, so that I could put everything on a grid without having to tear the markup structure apart, and there are doubtless even more interesting clipping paths and layout patterns to try out.

I hope these few ideas spark some much better ideas in you, and that you’ll share them with us!

About the author

Eric A. Meyer (@meyerweb) has been a burger flipper, a college webmaster, an early blogger, one of the original CSS Samurai, a member of the CSS Working Group, a consultant and trainer, and a Standards Evangelist for Netscape. Among other things, Eric co-wrote Design For Real Life with Sara Wachter-Boettcher for A Book Apart and CSS: The Definitive Guide with Estelle Weyl for O’Reilly, created the first official W3C test suite, assisted in the creation of microformats, and co-founded An Event Apart with Jeffrey Zeldman. Eric lives with his family in Cleveland, Ohio, which is a much nicer city than you’ve probably heard. He enjoys a good meal whenever he can and considers almost every form of music to be worthwhile.

More articles by Eric

Dewey Library - JK468.I6 T76 2019

Online Resource

Hayden Library - HV6439.M58 D87 2018

Dewey Library - U263.A44 2019

At his yoga camps, the guru has offered no excuses while seeking votes for the BJP.

Berlin ; New York : Springer, [2005]

New York, NY : Springer, [2006]

Berlin ; New York : Springer, [2006]

Guo, Rongxing, author

Shahare, Vaishali V., author

Bowman, William D., author

Sueyoshi, T. (Toshiyuki), 1954- author

Kwasinski, Alexis, 1970- author

Taylor, Dorceta E

According to the consumer survey, more than a third of Apple customers showed interest in paying as much as $600 extra for a foldable iPhone

Moovit will remain independent while its technology and the data it collects from more than 800 million users in 102 countries will be integrated into Intel's autonomous car unit Mobileye

Norman, M. A

Cromer, E. L

Norman, M. A

Warner, Terence E., 1960-

Jones, Andrew N., author

JSJ 276: Vue.js with Maximilian Schwarzmüller         

This episode of JavaScript Jabber features panelists AJ O’Neal, Aimee Knight, and Charles Max Wood. They talk with special guest Maximilian Schwarzmüller about Vue.js. Tune in to find out more!

[00:02:21] Introduction to Maximilian

Maximilian lives in Germany and is a self-taught web developer. He mostly teaches web development on Udemy and his YouTube channel. Vue.js is just one topic that he teaches. He enjoys teaching and passing on information to other web developers: he believes it is the best thing you can do.

[00:03:10] What other courses do you teach?

He tries to cover basic web development topics. On Udemy Maximilian teaches Angular and generic JavaScript courses. He also teaches courses on Angular and Node.js. On his YouTube channel he teaches more back-end development and Node.js courses.

[00:04:00] Elevator Pitch for Vue.js

Vue.js is a new framework that is popular because it is similar to React but also has Angular features. It is easier to learn than React: not everything is in JavaScript and JXS is not included. It is more also flexible and has better performance than Angular 1. Vue.js is easier than Angular 2 both to learn and master. It is still a JavaScript framework, where developers build single page applications or drop in existing applications to enhance views, control parts of a page with JavaScript, get rid of jQuery, and have an easier time creating applications.

[00:05:10] What are some challenges people run into as they learn it?

If developers are brand new to Vue.js, getting started is easy. It has one thing that a lot of frameworks lack which is awesome documentation. Vuejs.org has a comprehension guide that makes getting started simple. There is a general idea that developers still need to learn of how to structure the app, which is similar to React. Developers have to learn how to build components which is used to build the application. The build template is where everything is controlled with Vue.js. JavaScript code is used as well as template syntax.

[00:06:27] So you build the template and then tell it how each part is supposed to behave with JavaScript?

Yes. To get started use Vue instances, which are JavaScript objects, control parts of the page and it is marked by an id on an HTML element. Then, write a Vue template, which is basically HTML code where extra features can be used to easily output a variable. It makes it much easier to control via Vue instance. Then add a code, add a method which changes the property of Vue instance. It works together and is easy to build up templates and control your page with Vue.

[00:11:12] Vue’s Advantages

That depends on the application. Vue.js is easier to learn, which is an advantage when trying to get new developers. The documentation on the website is excellent, which helps when learning the language. Vue also has it’s own single team that develops it’s products, such as the Vue Router and Vue X. It has better performance, but for extremely big projects Angular 4 may be better.

[00:13:38] Does Vue have routing in it?

Vue.js has its own router. The core Vue team develops it, which is a different package that is downloaded separately. The advantage to this is that if you don’t need the router, then you don’t have it in your bundle but can easily add it. Once it is added it integrates nicely.

[00:14:16] How does the Vue router compare to the React router?

The Vue router offers the same features as the React router: nested routes, passing parameters, route guards, etc. The Vue router integrates nicely into the Vue package. It also injects into every component you have and is very simple. All that has to be done is just to execute one line of code and then the router is in the project.

[00:17:10] How often is Vue.js upgraded and how hard is it to keep up?

Vue.js only has two versions. Upgrading from Vue 1 to Vue 2 is easy. The base syntax and framework is still the same, you just need to adjust and move on. Since Vue 2 they released bigger upgrades. There so far haven’t been any issues upgrading, they have added new features, and still use the old code.

[00:19:09] What is the feature with Vue as far as adoption goes?

It is hard to predict but there are indicators that Vue.js has a good future. Vue.js probably will not overtake Angular but it is becoming important for companies in Asia, which is an important market. They have developed an Ionic version of Vue.js. There has also been an ongoing trend on GitHub.

[00:21:20] Why do we keep having new frameworks and versions?

The language of JavaScript itself is seeing rapid development. New features have been added, new web technologies developed, etc. One reason is that developers do more on the web. They want easier ways of building applications. There is no perfect framework so there has to be tradeoffs between the frameworks. There is no perfect solution for every application so need a framework for every application.

[00:23:16] What is left undone in Vue.js?

It is complete as far as something can be complete. Developers are working on service rendering to improve search engine optimization and initial rendering performance. They are also working on progress web app support.

[00:28:02] What drives the way that Vue grows?

There is simplicity in their documentation. While the documentation is simple, the framework is also easy to learn. Maximilian believes that the reason Vue.js took off is because the documentation and framework work together nicely.

[00:31:19] What is going to keep Vue around?

The support is not based on corporation, but there is an Asian company that is developing a framework that uses Vue to with their own product. Because of this, can draw an assumption that they will keep Vue.js around. Vue.js also has a strong community and core team, giving it a good support system.

[00:34:15] What are people using if they want to use Native Apps but they want to use Vue?

They are having a hard time right now. Frameworks for Quasar and Weex are in the early stages. A Vue.js app needs to be built but there are packages that are working in that direction.

[00:37:25] How do you structure your Udemy courses and what do you think of that as a whole?

Maximilian started teaching Udemy courses about one and a half years ago. He really enjoys teaching. Each course follows a similar pattern. He starts with a rough topic, researches the topic to see what is in demand, and builds a course around projects. He then fits all the things he wants to teach into the project, plans the course curriculum, records and edits the lecture videos, and then finally releases the course.

[00:39:22] What do you get the most questions about with your Vue course?

Questions are mixed. Students dive into the course quickly but then pause. Most questions are about the basics. They usually have something to do with the first few sections of the course or setup problems.

Picks         

AJ:

• Broke Eatery 
• Dream Dinners

Aimee:

• Julie Evans blog 
• Nodevember

Charles:

• The Ketogenic Diet
• 2 Keto Dudes Podcast 

Max:

• Nuxt.js Framework 
• Slack “Chat with yourself” Channel

Links

• Onsen UI for Vue
• Twitter
• Youtube
• https://academind.com/
• Utemy Vue.js Course 

Maximiliano Firtman is a mobile web developer from Buenos Ares, Argentina. He has been a developer for 24 years and his most recent focus has been on progressive web apps, or PWAs. Steve and Max reflect on the technologies they were using when they first got started in web development and talk about their experience with mobile development. One area that Max emphasized was bringing the web into the mobile space. They discuss the progression of web access on mobile and some of the available tools. Max notes that responsible design has a very high cost in web performance for mobile devices, which requires unique approaches. They discuss some of the issues with latency in mobile, even on 4G. The solution to this latency is PWAs.

Progressive web apps are a set of best practices to create web apps that are installable. They can work offline at high speeds on several operating systems. Once installed, it looks like any other app on the system. Max delves into more details on how it works. He talks about how the resources for your application are managed. He assures listeners that it’s just a website that’s using a new API, they’re not changing the way the web works, and that when that API is there, the app can be installed. It will also generally use your default browser. Steve and Max discuss how local data is stored with PWAs. To write PWAs, you can use Angular, React, JavaScript, or Vue, and it’s a pretty transparent process. Max talks about some common tools used for local storage and some of the PWAs he’s worked on in the past. The benefit of using PWAs is that they generally run faster than regular web apps. To get started, Max advises listeners to install one and start exploring.

Panelists

• Steve Edwards

Guest

• Maximiliano Firtman

Sponsors

• G2i

____________________________

"The MaxCoders Guide to Finding Your Dream Developer Job" by Charles Max Wood is now available on Amazon. Get Your Copy Today!

____________________________________________________________

Links

• Progressive Web Apps

• Appsco.pe

• IndexedDB

• Max's site

Picks

Steve Edwards:

• The Club

Maximiliano Firtman:

• Llama

• Follow Max on Twitter

My JavaScript Story this week welcomes Maximiliano Firtman. Maximiliano Firtman is a mobile web developer from Buenos Ares, Argentina. He has been a developer for 24 years and his most recent focus has been on progressive web apps.

Maximiliano started coding when he was 11 years old by creating games and digital magazines. He got into web development by learning HTML in college.

Host: Charles Max Wood

Joined By Special Guest: Maximiliano Firtman

Sponsors

• Sentry use the code “devchat” for 2 months free on Sentry small plan

• CacheFly

______________________________________

"The MaxCoders Guide to Finding Your Dream Developer Job" by Charles Max Wood is now available on Amazon. Get Your Copy Today!

______________________________________

Links

• JSJ 415: Progressive Web Apps with Maximiliano Firtman

• Maximiliano Firtman Website

• Maximiliano Firtman Twitter

Picks

Maximiliano Firtman:

• Using Trusted Web Activities

Charles Max Wood:

• Generation Z Unfiltered by Tim Elmore

Stephen, Lynn

McLeod, Doug

Hayden Library - PQ7123.W6 E88 2018