# simple_active_link_to
`simple_active_link_to` is a wrapper for [link_to](http://api.rubyonrails.org/classes/ActionView/Helpers/UrlHelper.html#method-i-link_to), but with active state by adding an extra css class `active` by default.
This project is fork of [active_link_to](https://github.com/comfy/active_link_to), but without wrap tag, and some code improvement.
[](http://rubygems.org/gems/simple_active_link_to)
[](http://rubygems.org/gems/simple_active_link_to)
Require ruby >= 2.4
## Installation
add `gem 'simple_active_link_to'` to Gemfile and run `bundle install`.
or using `bundle add` command
`bundle add simple_active_link_to`
## Super Simple Example
Here's a link that will have a class attached if it happens to be rendered
on page with path `/users` or any child of that page, like `/users/123`
```ruby
simple_active_link_to 'Users', '/users'
# => Users
```
This is exactly the same as:
```ruby
simple_active_link_to 'Users', '/users', active: :inclusive
# => Users
```
## Active Options
Here's a list of available options that can be used as the `:active` value
```
* Boolean -> true | false
* Symbol -> :exclusive | :inclusive | :exact
* Regex -> /regex/
* Controller/Action Pair -> [[:controller], [:action_a, :action_b]]
* Controller/Specific Action Pair -> [controller: :action_a, controller_b: :action_b]
* Hash -> { param_a: 1, param_b: 2 }
```
## More Examples
Most of the functionality of `simple_active_link_to` depends on the current
url. Specifically, `request.original_fullpath` value. We covered the basic example
already, so let's try something more fun.
We want to highlight a link that matches immediate url, but not the children
nodes. Most commonly used for 'home' links.
```ruby
# For URL: /users will be active
simple_active_link_to 'Users', users_path, active: :exclusive
# => Users
```
```ruby
# But for URL: /users/123 it will not be active
simple_active_link_to 'Users', users_path, active: :exclusive
# => Users
```
If we need to set link to be active based on some regular expression, we can do
that as well. Let's try to activate links urls of which begin with 'use':
```ruby
simple_active_link_to 'Users', users_path, active: /^\/use/
```
If we need to set link to be active based on an exact match, for example on
filter made via a query string, we can do that as well:
```ruby
simple_active_link_to 'Users', users_path(role_eq: 'admin'), active: :exact
```
What if we need to mark link active for all URLs that match a particular controller,
or action, or both? Or any number of those at the same time? Sure, why not:
```ruby
# For matching multiple controllers and actions:
simple_active_link_to 'User Edit', edit_user_path(@user), active: [['people', 'news'], ['show', 'edit']]
# For matching specific controllers and actions:
simple_active_link_to 'User Edit', edit_user_path(@user), active: [people: :show, news: :edit]
# for matching all actions under given controllers:
simple_active_link_to 'User Edit', edit_user_path(@user), active: [['people', 'news'], []]
# for matching all controllers for a particular action
simple_active_link_to 'User Edit', edit_user_path(@user), active: [[], ['edit']]
```
Sometimes it should be as easy as giving link true or false value:
```ruby
simple_active_link_to 'Users', users_path, active: true
```
If we need to set link to be active based on `params`, we can do that as well:
```ruby
simple_active_link_to 'Admin users', users_path(role_eq: 'admin'), active: { role_eq: 'admin' }
```
## More Options
You can specify active and inactive css classes for links:
```ruby
simple_active_link_to 'Users', users_path, class_active: 'enabled'
# => Users
simple_active_link_to 'News', news_path, class_inactive: 'disabled'
# => News
```
Sometimes you want to replace link tag with a span if it's active:
```ruby
simple_active_link_to 'Users', users_path, active_disable: true
# => Users
```
## Helper Methods
You may directly use methods that `simple_active_link_to` relies on.
`is_active_link?` will return true or false based on the URL and value of the `:active` parameter:
```ruby
is_active_link?(users_path, :inclusive)
# => true
```
`active_link_to_class` will return the css class:
```
active_link_to_class(users_path, active: :inclusive)
# => 'active'
```