Web Development with CoffeeScript and Sass

Web Development with Sass and CoffeeScript Brian P. HoganBrian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

Brian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

What about you?Brian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

Web pages run on CSS and JavaScriptBrian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

CSS feels limited and repetitiveBrian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

and many people don’t really understand JavaScriptBrian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

Brian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

We need to use better tools to build modern web apps.Brian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

CoffeeScript lets us write complex JS with simpler syntax.Brian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

Sass gives us extensions to CSS.Brian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

Sass + CoffeeScript + automated workflowBrian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

CoffeeScriptBrian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

It’s more of a new syntax than a new language.Brian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

Some jQuery $(function() { $("a#get").click(function(e) { .get("/ajax/get", {name: "John",time: "2pm"}, function(data) { $("#result").html(data); } ); }); });Brian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

in CoffeeScript $ -> $("a#get").click (e) -> $.get "/ajax/get", {name: "John", time: "2pm"}, (data) -> $("#result").html(data)Brian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

CoffeeScript borrows from Python and Ruby syntax.Brian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

CoffeeScript uses significant whitespace for scope.Brian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

CoffeeScript compiles to regular, plain old JavaScript.Brian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

Declaring variables and objects var box, colors, firstName, lastName; firstName = "Homer" firstName = "Homer"; lastName = "Simpson" lastName = "Simpson"; colors = ["Green", "Blue", "Red"] colors = ["Green", "Blue", "Red"]; box = box = { height: 40 height: 40, width: 60 width: 60, color: red color: red };Brian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

JavaScript functions // function declaration. Visible anywhere (hoisting) (function hello(name){ alert("Hello " + name + "!"); } // function expression, visible to the scope of the var var hello = function(name){ alert("Hello " + name + "!"); }Brian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

Function declaration in CoffeeScript hello -> alert "Hello" hello (name) -> alert "Hello #{name}" -> (thin arrow)Brian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

CoffeeScript uses function expressions. hello (name) -> alert "Hello #{name}!" var hello = function(name){ alert("Hello " + name + "!"); } #{} interpolates strings.Brian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

New syntax means new features.Brian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

a jQuery example $(function() { var displayError, displaySuccess, url; $("form").submit(function(event) {}); event.preventDefault(); url = $(this).attr("href"); $.ajax({ url: url + ".js", success: function(data, status, xhr) { displaySuccess($("#form")); }, error: function(xhr, status, error) { displayError(error); } }); displaySuccess = function(form) { var element; element = $("<p>Thanks for signing up!").addClass("success"); element.insertAfter(form); form.hide(); }; displayError = function(error) { $("#notice").attr("html", error); }; });Brian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

jQuery $(function(){}) $ -> $("form").submit (event) -> event.preventDefault() url = $(this).attr "href" $.ajax url: url + ".js" success: (data, status, xhr) -> displaySuccess($("form")) error: (xhr, status, error) -> displayError error displaySuccess = (form) -> element = $("<p>Thanks for signing up!").addClass("success") element.insertAfter form form.hide() displayError = (error) -> $("#notice").attr "html", errorBrian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

jQuery event handler $ -> $("form").submit (event) -> event.preventDefault() url = $(this).attr "href" $.ajax url: url + ".js" success: (data, status, xhr) -> displaySuccess($("form")) error: (xhr, status, error) -> displayError error displaySuccess = (form) -> element = $("<p>Thanks for signing up!").addClass("success") element.insertAfter form form.hide() displayError = (error) -> $("#notice").attr "html", errorBrian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

jQuery $.ajax $ -> $("form").submit (event) -> event.preventDefault() url = $(this).attr "href" $.ajax url: url + ".js" success: (data, status, xhr) -> displaySuccess($("form")) error: (xhr, status, error) -> displayError error displaySuccess = (form) -> element = $("<p>Thanks for signing up!").addClass("success") element.insertAfter form form.hide() displayError = (error) -> $("#notice").attr "html", errorBrian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

success and error callbacks $ -> $("form").submit (event) -> event.preventDefault() url = $(this).attr "href" $.ajax url: url + ".js" success: (data, status, xhr) -> displaySuccess($("form")) error: (xhr, status, error) -> displayError error displaySuccess = (form) -> element = $("<p>Thanks for signing up!").addClass("success") element.insertAfter form form.hide() displayError = (error) -> $("#notice").attr "html", errorBrian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

-> leaves (this) scope alone. $ -> $("form").submit (event) -> event.preventDefault() url = $(this).attr "href" $.ajax url: url + ".js" success: (data, status, xhr) -> displaySuccess($("form")) error: (xhr, status, error) -> displayError error displaySuccess = (form) -> element = $("<p>Thanks for signing up!").addClass("success") element.insertAfter form form.hide() displayError = (error) -> $("#notice").attr "html", errorBrian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

=>Brian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

=> binds this to the function body $ -> $("form").submit (event) -> event.preventDefault() url = $(this).attr "href" $.ajax url: url + ".js" success: (data, status, xhr) => displaySuccess($(this)) error: (xhr, status, error) -> displayError error displaySuccess = (form) -> element = $("<p>Thanks for signing up!").addClass("success") element.insertAfter form form.hide() displayError = (error) -> $("#notice").attr "html", errorBrian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

ComprehensionsBrian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

Simple iteration alert color for color in ["red", "green", "blue"] var colors = ["red", "green", "blue"]; for (i = 0, length = colors.length; i < length; i++) { var color = colors[i]; alert(color); }Brian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

“for in” people = [ {name: "Homer", age: 42} {name: "Bart", age: 10} ] for person in people alert "#{person.name} is #{person.age} years old"Brian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

That’s just the beginning.Brian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

Existential operator (?) total ?= 0 if (typeof total !== "undefined" && total !== null) { total; } else { total = 0; };Brian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

Object-oriented JavaScriptBrian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

Classes var Person, p; Person = (function() { function Person(options) { this.firstname = options.firstname; this.lastname = options.lastname; this.age = options.age; } Person.prototype.fullname = function() { return "" + this.firstname + " " + this.lastname; }; return Person; })(); p = new Person({ firstname: "Brian", lastname: "Hogan" }); alert(p.fullname());Brian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

Classes var Person, p; Person = (function() { function Person(options) { this.firstname = options.firstname; this.lastname = options.lastname; class Person this.age = options.age; constructor: (options) -> } @firstname = options.firstname Person.prototype.fullname = function() { @lastname = options.lastname return "" + this.firstname + " " + this.lastname; @age = options.age }; return Person; fullname: -> })(); "#{@firstname} #{@lastname}" p = new Person({ firstname: "Brian", lastname:="Hogan" p new Person }); alert p.fullname() alert(p.fullname());Brian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

We can even extend classes! class basicWindow constructor: -> class mainWindow extends basicWindow @window = Ti.UI.createWindow({ constructor: -> backgroundColor: "#F5F5ED" super }) @window.backgroundColor = "#fff" open: -> @window.open()Brian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

How do we use it? In the web browser itself via Node.js With Ruby, via GuardBrian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

In the browser? <script language="text/coffeescript"> people = [ {name: "Homer", age: 42} {name: "Bart", age: 10} ] for person in people do (person) -> alert "#{person.name} is #{person.age} years old" </script> <script src="coffee-script.js"></script> (this is slow.)Brian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

With Node.js Install Node.js Install npm npm install -g coffee-script coffee --compile --output js/ coffee/ coffee -o js/ -cw coffee/Brian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

Ruby and Guard Install Ruby gem install guard-coffeescript In our project guard init coffeescript guardBrian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

Guard watches input folders for changes and writes output files.Brian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

Guard works with Sass too.Brian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

Sass Syntactically Awesome StylesheetsBrian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

Sass gives CSS everything programmers want.Brian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

CSS .sidebar { color: #000; border: 1px solid #000; } .sidebar p { margin-bottom: 20px; } .sidebar ul { margin-bottom: 10px; } .sidebar h1 { margin-bottom: 0; } .main{ color: #000; }Brian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

Sass to the rescue!Brian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

Variables! $measure: 20px $color: #ce4dd6 .sidebar background-olor: $color border: 1px solid lighten($color, 20%) p margin-bottom: $measure ul margin-bottom: $measure / 2 h1 margin-bottom: 0Brian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

Variables and helper functions! $measure: 20px $color: #ce4dd6 .sidebar background-olor: $color border: 1px solid lighten($color, 20%) p margin-bottom: $measure ul margin-bottom: $measure / 2 h1 margin-bottom: 0Brian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

Scope with nesting $measure: 20px $color: #ce4dd6 .sidebar background-olor: $color border: 1px solid lighten($color, 20%) p margin-bottom: $measure ul margin-bottom: $measure / 2 h1 margin-bottom: 0Brian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

Indented Sass SCSS $measure: 20px $measure: 20px; $color: #000 $color: #000; .sidebar .sidebar{ color: $color color: $color; border: 1px solid $color border: 1px solid $color; p p{ margin-bottom: $measure margin-bottom: $measure; } ul margin-bottom: $measure / 2 ul{ margin-bottom: $measure / 2; h1 } margin-bottom: 0 h1{ margin-bottom: 0; } }Brian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

But wait... there’s more!Brian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

Modularization _mixins.scss @import "mixins"; @import "reset"; @import "base"; _reset.scss @import "fonts"; _base.scss _fonts.scssBrian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

Reusable Functions (mixins) blockquote { @mixin rounded($radius){ width: 225px; border-radius: $radius; padding: 15px 30px; -moz-border-radius: $radius; margin: 0; -webkit-border-radius: $radius; position: relative; } background: #faa; @include rounded(20px); } .button { cursor: pointer; color: #000; text-decoration: none; @include rounded(12px); }Brian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

Mixins + Interation + Variables @mixin shadow($x, $y, $offset, $color) @each $prefix in "", -moz-, -webkit-, -o-, -khtml- #{$prefix}box-shadow: $x $y $offset $colorBrian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

Mixins + Interation + Variables @mixin shadow($x, $y, $offset, $color) @each $prefix in "", -moz-, -webkit-, -o-, -khtml- #{$prefix}box-shadow: $x $y $offset $color box-shadow: 5px 5px 5px #dddddd; -moz-box-shadow: 5px 5px 5px #dddddd; -webkit-box-shadow: 5px 5px 5px #dddddd; -o-box-shadow: 5px 5px 5px #dddddd; -khtml-box-shadow: 5px 5px 5px #dddddd; }Brian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

Create well-organized folders and libraries of stylesheets.Brian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

or use Compass. http://compass-style.org/Brian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

Compass has helpers @import compass @include box-shadow(#ddd 5px 5px 5px) box-shadow: 5px 5px 5px #dddddd; -moz-box-shadow: 5px 5px 5px #dddddd; -webkit-box-shadow: 5px 5px 5px #dddddd; -o-box-shadow: 5px 5px 5px #dddddd;}Brian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

How do we use it? via Sass via a supported IDE With Ruby, via GuardBrian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

with Sass Install Ruby $ gem install sass $ sass --watch sass:stylesheetsBrian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

Ruby and Guard Install Ruby gem install guard-sass In our project guard init sass guardBrian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

Using Sass and CoffeeScript togetherBrian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

Mindscape Web Workbench http://www.mindscapehq.com/products/web-workbenchBrian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

Ruby and Guard Install Ruby gem install guard-sass guard- coffeescript In our project guard init sass guard init coffeescript guardBrian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

Let’s talk deploymentBrian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

Rails 3.1 and CapistranoBrian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

Asset PackagingBrian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

So instead of this... <link rel="stylesheet" href="stylesheets/layout.css"> <link rel="stylesheet" href="stylesheets/style.css"> <script src="javascripts/jquery-1.7.0.min.js"></script> <script src="javascripts/app.js"></script>Brian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

...let’s do this: <link rel="stylesheet" href="assets/app.css"> <script src="assets/app.js"></script>Brian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

Ruby + Guard + Jammit Install Ruby $ gem install guard-jammitBrian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

Sass, CoffeeScript, Jammit watch Sass files for changes Place output css in tmp/ folder watch CoffeeScript files for changes Place output js in tmp/ folder Use Jammit to combine them.Brian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

config/assets.yml stylesheets: app: - tmp/app.css - tmp/style.css javascripts: app: - javascripts/jquery-1.6.4.js - tmp/app.jsBrian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

Guardfile guard "coffeescript", :input => "coffeescripts", :output => "tmp" guard "sass", :input => "sass", :output => "tmp" guard "jammit" do watch(/^javascripts/(.*).js/) watch(/^stylesheets/(.*).css/) watch(/^tmp/(.*).js/) watch(/^tmp/(.*).css/) endBrian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

Jammit places files in public/assets <link rel="stylesheet" href="assets/app.css"> <script src="assets/app.js"></script>Brian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

Deploy with Rake SERVER = "yourhost.com" USERNAME = "yourusername" REMOTE_FOLDER = "/home/#{USERNAME}/yourhost.com" REMOTE_FOLDER = 22 require net/scp desc "compile CSS, js files" task :compile do require guard Guard.setup Guard::Dsl.evaluate_guardfile Guard::guards.each{|guard| guard.run_all} end desc "Deploy web site" task :deploy => :compile do Net::SSH.start(SERVER, USERNAME, {:port => PORT} ) do |ssh| ssh.sftp.rmdir File.join(REMOTE_FOLDER, "public") ssh.scp.upload! "public", REMOTE_FOLDER, :recursive => true end endBrian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

qedproject https://github.com/napcs/qedprojectBrian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

qedproject Install Ruby gem install qedproject qedproject myapp -c -s -a -l jquery creates app with Sass, CoffeeScript, Asset packaging, and jQuery Sets up Guard and a simple Rake file for deploymentBrian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

DemoBrian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

Short syntax Nested Selectors Catch errors at compile time Variables List Mixins Comprehensions Composition ClassesBrian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

With asset packagingand automated deployment...Brian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

...CoffeeScript and Sass make developers happy.Brian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

Questions? http://pragprog.com/book/wbdev/web- development-recipesBrian P. Hogantwitter: @bphoganwww.webdevelopmentrecipes.com Rate this talk at http://spkr8.com/t/8682

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Web Development with CoffeeScript and Sass

by Brian Hogan

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Web Development with CoffeeScript and Sass Presentation Transcript