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Media queries always begin with the @media “at-rule” followed by some kind of conditional statement, and then some curly braces. Inside the curly braces, you put a bunch of ordinary CSS rules. The browser only pays attention to those rules if the condition is met.

The only screen “media type” means that the contained styles should only be applied to devices with screens (opposed to printed documents, like when you hit Cmd+P in a browser). The min-width and max-width parts are called “media features”, and they specify the device dimensions you’re targeting.

The above media queries are by far the most common ones you’ll encounter, but there are a lot of other conditions you can check for, including whether the device is in portrait or landscape mode, the resolution of its screen, and whether it has a mouse or not.

A Few Notes on Design

Ok, so @media is how we define different layouts for specific device widths, but what layouts are we actually trying to implement? The example web page for this chapter is going to look something like this:

In the real world, it’s up to your web designer to supply you with these kinds of mockups. Your job as a developer is to implement the individual layouts using media queries to separate out the various CSS rules that apply to each one.

There’s a few well defined patterns for how a desktop layout collapses into a mobile layout (we’re using “layout shifter”). A lot of these decisions are in the realm of design, which is outside the scope of this code-oriented tutorial; however, there are two concepts that you must understand as a developer:

In our example web page, the mobile and tablet versions are fluid, and the desktop version is fixed-width.

Choosing Breakpoints

Most of those responsive design patterns have similar behavior, using fluid layouts for mobile/tablet devices and fixed-width layouts for wider screens. There’s a reason for this.

Fluid layouts let us target a range of screen widths instead of specific mobile devices. This is very important for web designers. When they set out to create a mobile layout, they aren’t trying to make something that looks good on an iPhone 6s, Galaxy S7, or iPad mini—they’re designing a fluid layout that looks good anywhere between 300 pixels and 500 pixels (or whatever).

In other words, the exact pixel values for the min-width and max-width parameters in a media query (collectively known as the “breakpoints” for a responsive website) don’t actually matter. Our website doesn’t care about the specific device the user is on. All it needs to know is that it should display a layout that looks pretty at 400 pixels wide (or whatever).

Mobile-First Development

Let’s dive right into implementing the above screenshots. It’s always a good idea to start with the mobile layout and work your way up to the desktop version. Desktop layouts are typically more complex than their mobile counterparts, and this “mobile-first” approach maximizes the amount of CSS that you can reuse across your layouts.

So without proper equipment (and after a few episodes, with a ~$80 mic) I started producing screencasts , a series in which a simple application is developed step-by-step. I sent the first few to my subscribers and kept producing them. And people seemed to have liked them.

screencasts And people seemed to have liked them.

Great episode! Pace and depth was perfect. Thanks for such a great webcast series !

— Curtis Wallen

I really appreciate the effort you want to put up. Just wanted to thank you for this and let you know that your video series rock!

— Antonio Antillon

Once the screencast series was finished, I switched to blog posts and lengthier articles, and in 2014 I committed to posting something of value each week. Then, after a long labor of (mostly) love, I published the 1st edition of the book in Feburary 2015 , that used the then stable Ember version, 1.10.

I published the 1st edition of the book in Feburary 2015

I was not done, though. As Ember made progress in a neck breaking pace, I kept the book up-to-date with the actual stable version of the framework, and adding material that covered the new features.

Version 2 of the book, that is running on Ember 2, was published about 6 months later and I've been updating the book for every minor version ever since.

Buy once, get all minor updates for free

The first edition of this book followed Ember's journey to its 2.0 release. As Ember gracefully shedded old syntaxes, the book's content was updated not to use those syntaxes, either. When a new feature appeared, I added a section about it, trying to find a practical example for it in the application.

Since Ember follows a 6-week release cycle, that meant frequent book updates, precisely 18 "minor book releases" in 26 months. These updates came free for all of my customers, no matter which package they chose. I'll follow the same policy during the road to Ember 4 and so I'll keep in sync with the latest stable version of Ember 3 and keep the content fresh.

I really like it! It is super difficult to find the right balance between pacing and detail and put it all together in an understandable form but you pulled it off.

— Cory Forsyth

Just wanted to say thanks for the ongoing updates of the book. Even after finishing the book, it’s becoming a great reference for the changes Ember is going through.

— Gabriel Rotbart

Table of Contents

Click to Read More

Stuff in here you can"t find elsewhere on Ember.js. Thanks Balint for this awesome book.

— Joel Fuller

In months of searching this is the best Ember.js resource that exists ... so much so I"m going to try to get a few copies sorted out for my team at work. Thanks Balint!

— Andy Davison

About me

Hello there, I'm Balint Erdi.

I have a long history of building web applications and have mostly been a back-end guy.

On a grey, chilly February day in 2013 that I’ll never forget (maybe it was January?) I got acquainted with Ember.js. Ember.js made that day bright and the ones that came after that. After learning the ropes I shifted gears and have been proselytizing for Ember since last summer.

I gave workshops at Romika Carlo 03 Slippers Mens Black Schwarz 100 100 wk9rxd7ruZ
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, and presented at EmberConf, EmberFest , AgentConf and Unisex Women Men Winter Warm Short Plush Soft Sole Striped Indoor AntiSlip Slippers Home Wear Shoes Dark Blue qsqPsn
. I started an Ember.js mailing list, made an introductory screencast series and have been sending Ember content to my dear subscribers on a weekly basis. I have also written guest articles for Safari Books Online , AirPair , Firebase and .

I guess you could say I’m pretty passionate about Ember.

Oh, and I love rock roll, obviously.

Bonus 1: The EmberMap deal

EmberMap is the maker of outstanding video series on a whole range of different Ember topics including contextual components, data loading, D3 charts and a whole lot more. I'm a huge fan (and subscriber) of the videos Sam and Ryan create. Buying any package gets you a 30-day free subscription to EmberMap (a $29 value)

Companies using the book

Basic Riffs Package

Basic but solid, as the name suggests. It contains:

17 chapters

This is what you absolutely need to get up running with Ember.js. Comes in pdf, mobi and epub formats for your reading pleasure.

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Subscribe Speaking Twitter About
March 7th 2016

For the past 2 years, ~90% of my coding time has been spent working on a large scale Backbone.js app. In February 2014, the Backbone community was in a fairly good place. The core library had reached 1.0 the previous year and had a strong team around it. Marionette had emerged as a de-facto standard for web applications Mizuno Men’s Wave Hurricane Mid Volleyball Shoes White/SafetyYellow/DirectoireBlue oVWI0yC
. There were Backbone specific plugins for many tasks, and generally gaps could be filled using the jQuery plugin ecosystem, or a framework agnostic library. At the time, Backbone would have been a very defensible choice as a library for starting a new web development, as a simpler and more stable alternative to AngularJS, the current “hot” framework.

Since then a few things have happened. First, React has taken off, while Angular and Ember have continued to grow and learn from React and each other. Angular and React have benefited from significant marketing and financial support for a core development team that have helped them grow quickly. Google Trends gives a pretty good idea of how that has turned out.

Update: I’ve changed the above graph from an original that used angular.js, backbone.js, ember.js, and react.js as the search terms. Only Backbone prefixes itself with a .js that way, and it undersold the other libraries, especially Angular. I believe that this chart more accurately reflects usage trends.

Update:

Secondly, Backbone’s author, Jeremy Ashkenas made a decision to call Backbone “finished” in terms of API and feature set after the 1.0 release. This has the advantage of leaving Backbone as by far the most stable major JavaScript framework, but hinders efforts to pull in lessons from other frameworks Highdas Water Socks Barefoot Skin Shoes Unisex Quick Dry Beach Surf Diving Home Slipper Pool Swimming Yoga Socks For Men Women 1 YdmbE7O4iY
.

Finally, whether as a result of the first 2 items or due to some other factor, the ecosystem around Backbone has crumbled. While Backbone’s core has stabilized, it still has a team of maintainers who are actively managing the project. That does not appear to be the case for many of the other libraries in the Backbone ecosystem. To investigate my perception of this, I decided to look at the contribution graphs of popular Backbone libraries to see the trends over the last 2 years. I built a list of libraries based on the projects that the bower registry returns for the backbone keyword, looking for projects with at least 400 github stars VogueZone009 Womens Sequins Studded Buckle Pointed Closed Toe NoHeel Flats Shoes Gray tE3zM
. That lead to a list of 24 projects below.

To be clear, I’m not posting this as a criticism of anyone. Open source is a volunteer effort, and maintaining a project is hard and often doesn’t make sense when the author has moved on to other challenges. This is simply an honest look at where the Backbone ecosystem stands, with the goal of helping those of us who are building Backbone applications or considering using it to evaluate the ecosystem honestly.

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