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Guide updated in line with changes in rails commands [skip ci]

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soartec-lab 2019-04-16 23:35:36 +09:00
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guides/source/asset_pipeline.md
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@ -33,13 +33,10 @@ passing the `--skip-sprockets` option.
rails new appname --skip-sprockets rails new appname --skip-sprockets
``` ```
Rails automatically adds the `sass-rails`, `coffee-rails` and `uglifier` Rails automatically add the `sass-rails` gem to your `Gemfile`, which are used by Sprockets for asset compression:
gems to your `Gemfile`, which are used by Sprockets for asset compression:
```ruby ```ruby
gem 'sass-rails' gem 'sass-rails'
gem 'uglifier'
gem 'coffee-rails'
``` ```
Using the `--skip-sprockets` option will prevent Rails from adding Using the `--skip-sprockets` option will prevent Rails from adding
@ -176,8 +173,7 @@ in `app/assets` are never served directly in production.
### Controller Specific Assets ### Controller Specific Assets
When you generate a scaffold or a controller, Rails also generates a JavaScript When you generate a scaffold or a controller, Rails also generates a
file (or CoffeeScript file if the `coffee-rails` gem is in the `Gemfile`) and a
Cascading Style Sheet file (or SCSS file if `sass-rails` is in the `Gemfile`) Cascading Style Sheet file (or SCSS file if `sass-rails` is in the `Gemfile`)
for that controller. Additionally, when generating a scaffold, Rails generates for that controller. Additionally, when generating a scaffold, Rails generates
the file `scaffolds.css` (or `scaffolds.scss` if `sass-rails` is in the the file `scaffolds.css` (or `scaffolds.scss` if `sass-rails` is in the
@ -434,9 +430,7 @@ one file rather than many, the load time of pages can be greatly reduced because
the browser makes fewer requests. Compression also reduces file size, enabling the browser makes fewer requests. Compression also reduces file size, enabling
the browser to download them faster. the browser to download them faster.
For example, suppose `app/assets/javascripts/application.js` file containing the following lines:
For example, a new Rails application includes a default
`app/assets/javascripts/application.js` file containing the following lines:
```js ```js
// ... // ...
@ -476,8 +470,7 @@ which contains these lines:
*/ */
``` ```
Rails creates both `app/assets/javascripts/application.js` and Rails create `app/assets/stylesheets/application.css` regardless of whether the
`app/assets/stylesheets/application.css` regardless of whether the
--skip-sprockets option is used when creating a new Rails application. This is --skip-sprockets option is used when creating a new Rails application. This is
so you can easily add asset pipelining later if you like. so you can easily add asset pipelining later if you like.
@ -517,8 +510,7 @@ The file extensions used on an asset determine what preprocessing is applied.
When a controller or a scaffold is generated with the default Rails gemset, a When a controller or a scaffold is generated with the default Rails gemset, a
CoffeeScript file and a SCSS file are generated in place of a regular JavaScript CoffeeScript file and a SCSS file are generated in place of a regular JavaScript
and CSS file. The example used before was a controller called "projects", which and CSS file. The example used before was a controller called "projects", which
generated an `app/assets/javascripts/projects.coffee` and an generated an `app/assets/stylesheets/projects.scss` file.
`app/assets/stylesheets/projects.scss` file.
In development mode, or if the asset pipeline is disabled, when these files are In development mode, or if the asset pipeline is disabled, when these files are
requested they are processed by the processors provided by the `coffee-script` requested they are processed by the processors provided by the `coffee-script`
@ -1083,7 +1075,7 @@ Possible options for JavaScript compression are `:closure`, `:uglifier` and
`:yui`. These require the use of the `closure-compiler`, `uglifier` or `:yui`. These require the use of the `closure-compiler`, `uglifier` or
`yui-compressor` gems, respectively. `yui-compressor` gems, respectively.
The default `Gemfile` includes [uglifier](https://github.com/lautis/uglifier). For example, `uglifier` gem.
This gem wraps [UglifyJS](https://github.com/mishoo/UglifyJS) (written for This gem wraps [UglifyJS](https://github.com/mishoo/UglifyJS) (written for
NodeJS) in Ruby. It compresses your code by removing white space and comments, NodeJS) in Ruby. It compresses your code by removing white space and comments,
shortening local variable names, and performing other micro-optimizations such shortening local variable names, and performing other micro-optimizations such