HyperRouter

HyperRouter is a DSL wrapper for ReactRouter v4.x to provide client-side routing for Single Page Applications (SPA). As the user changes "pages" instead of reloading from the server your App will mount different components.

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Usage

class AppRouter
  include Hyperstack::Component
  include Hyperstack::Router::Helpers
  include Hyperstack::Router

  render(DIV) do
    UL do
      LI { Link('/') { 'Home' } }
      LI { Link('/about') { 'About' } }
    end
    Route('/', exact: true, mounts: Home)
    Route('/about', mounts: About)
  end
end

class Home
  include Hyperstack::Component
  render(DIV) do
    H2 { 'Home' }
  end
end

DSL

Router

This is the Router module which you include in your top level component:

class MyRouter
  include Hyperstack::Component
  include Hyperstack::Router
end

With the base Router class, you can also specify the history you want to use.

This can be done either using a macro:

class MyRouter
  include Hyperstack::Component
  include Hyperstack::Router

  history :browser  # this is the default option if no other is specified
end

The macro accepts three options: :browser, :hash, or :memory.

Or by defining the history method:

class MyRouter
  include Hyperstack::Component
  include Hyperstack::Router

  def history
    self.class.browser_history
  end
end

Rendering a Router

Use the render macro as normal. Note you cannot redefine the render instance method in a Router componenent

class MyRouter
  ...

  render(DIV) do
    H1 { 'Hello world!' }
  end
end

Routes

Routes are defined with special pseudo components you call inside the router/components. The router determines which of the routes to actually mount based on the current URL.

class MyRouter
  ...

  render(DIV) do
    Route('/', mounts: HelloWorld)
  end
end

class HelloWorld
  render do
    H1 { 'Hello world!' }
  end
end

The Route method takes a url path, and these options:

• mounts: Component The component you want to mount when routed to

• exact: Boolean When true, the path must match the location exactly

• strict: Boolean When true, the path will only match if the location and path both have/don't have a trailing slash

The Route method can also take a block instead of the mounts option.

class MyRouter
  ...

  render(DIV) do
    Route('/', exact: true) do
      H1 { 'Hello world!' }
    end
  end
end

The block will be given the match, location, and history data:

class MyRouter
  ...

  render(DIV) do
    Route('/:name') do |match, location, history|
      H1 { "Hello #{match.params[:name]} from #{location.pathname}, click me to go back!" }
        .on(:click) { history.go_back }
    end
  end
end

• The Hyperstack::Router::Helpers is useful for components mounted by the router.

• This automatically sets the match, location, and history params,

  and also gives you instance methods with those names.

• You can use either params.match or just match.

  and gives you access to the Route method and more.

• This allows you to create inner routes as you need them.

class MyRouter
  include Hyperstack::Component
  include Hyperstack::Router::Helpers
  include Hyperstack::Router

  render(DIV) do
    Route('/:name', mounts: Greet)
  end
end

class Greet
  include Hyperstack::Component
  include Hyperstack::Router::Helpers

  render(DIV) do
    H1 { "Hello #{match.params[:foo]}!" }
    Route(match.url, exact: true) do
      H2 { 'What would you like to do?' }
    end
    Route("#{match.url}/:activity", mounts: Activity)
  end
end

class Activity
  include Hyperstack::Component
  include Hyperstack::Router::Helpers
  include Hyperstack::Router

  render(DIV) do
    H2 { params.match.params[:activity] }
  end
end

Normally routes will always render alongside sibling routes that match as well.

class MyRouter
  ...

  render(DIV) do
    Route('/goodbye', mounts: Goodbye)
    Route('/:name', mounts: Greet)
  end
end

Switch

Going to /goodbye would match /:name as well and render Greet with the name param with the value 'goodbye'. To avoid this behavior and only render one matching route at a time, use a Switch component.

class MyRouter
  ...

  render(DIV) do
    Switch do
      Route('/goodbye', mounts: Goodbye)
      Route('/:name', mounts: Greet)
    end
  end
end

Now, going to /goodbye would match the Goodbye route first and only render that component.

Links

Links are provided by both the Hyperstack::Router and Hyperstack::Router::Helper modules.

The Link method takes a url path, and these options:

• search: String adds the specified string to the search query

• hash: String adds the specified string to the hash location

  it can also take a block of children to render inside it.

class MyRouter
  ...

  render(DIV) do
    Link('/Gregor Clegane')

    Route('/', exact: true) { H1() }
    Route('/:name') do |match|
      H1 { "Will #{match.params[:name]} eat all the chickens?" }
    end
  end
end

NavLinks

NavLinks are the same as Links, but will add styling attributes when it matches the current url

• active_class: String adds the class to the link when the url matches

• active_style: String adds the style to the link when the url matches

• active: Proc A proc that will add extra logic to determine if the link is active

class MyRouter
  ...

  render(DIV) do
    NavLink('/Gregor Clegane', active_class: 'active-link')
    NavLink('/Rodrik Cassel', active_style: { color: 'grey' })
    NavLink('/Oberyn Martell',
            active: ->(match, location) {
              match && match.params[:name] && match.params[:name] =~ /Martell/
            })

    Route('/', exact: true) { H1() }
    Route('/:name') do |match|
      H1 { "Will #{match.params[:name]} eat all the chickens?" }
    end
  end
end

Pre-rendering

Pre-rendering is automatically taken care for you under the hood.

Setup

To setup HyperRouter:

• Install the gem

• Your page should render your router as its top-level-component (first component to be rendered on the page) - in the example below this would be AppRouter

• You will need to configure your server to route all unknown routes to the client-side router (Rails example below)

With Rails

Assuming your router is called AppRouter, add the following to your routes.rb

root 'Hyperstack#AppRouter' # see note below
match '*all', to: 'Hyperstack#AppRouter', via: [:get] # this should be the last line of routes.rb

Note:

root 'Hyperstack#AppRouter' is shorthand which will automagically create a Controller, View and launch AppRouter as the top-level Component. If you are rendering your Component via your own COntroller or View then ignore this line.

Example

Here is the basic JSX example that is used on the react-router site

import React from 'react'
import {
  BrowserRouter as Router,
  Route,
  Link
} from 'react-router-dom'

const BasicExample = () => (
  <Router>
    <div>
      <ul>
        <li><Link to="/">Home</Link></li>
        <li><Link to="/about">About</Link></li>
        <li><Link to="/topics">Topics</Link></li>
      </ul>

      <hr/>

      <Route exact path="/" component={Home}/>
      <Route path="/about" component={About}/>
      <Route path="/topics" component={Topics}/>
    </div>
  </Router>
)

const Home = () => (
  <div>
    <h2>Home</h2>
  </div>
)

const About = () => (
  <div>
    <h2>About</h2>
  </div>
)

const Topics = ({ match }) => (
  <div>
    <h2>Topics</h2>
    <ul>
      <li><Link to={`${match.url}/rendering`}>Rendering with React</Link></li>
      <li><Link to={`${match.url}/components`}>Components</Link></li>
      <li><Link to={`${match.url}/props-v-state`}>Props v. State</Link></li>
    </ul>

    <Route path={`${match.url}/:topicId`} component={Topic}/>
    <Route exact path={match.url} render={() => (
      <h3>Please select a topic.</h3>
    )}/>
  </div>
)

const Topic = ({ match }) => (
  <div>
    <h3>{match.params.topicId}</h3>
  </div>
)

export default BasicExample

And here is the same example in Hyperstack:

class BasicExample
  include Hyperstack::Component
  include Hyperstack::Router::Helpers
  include Hyperstack::Router

  render(DIV) do
    UL do
      LI { Link('/') { 'Home' } }
      LI { Link('/about') { 'About' } }
      LI { Link('/topics') { 'Topics' } }
    end

    Route('/', exact: true, mounts: Home)
    Route('/about', mounts: About)
    Route('/topics', mounts: Topics)
  end
end

class Home
  include Hyperstack::Component
  include Hyperstack::Router::Helpers

  render(DIV) do
    H2 { 'Home' }
  end
end

class About  
  include Hyperstack::Component
  include Hyperstack::Router::Helpers

  render(:div) do
    H2 { 'About' }
  end
end

class Topics
  include Hyperstack::Component
  include Hyperstack::Router::Helpers

  render(DIV) do
    H2 { 'Topics' }
    UL() do
      LI { Link("#{match.url}/rendering") { 'Rendering with React' } }
      LI { Link("#{match.url}/components") { 'Components' } }
      LI { Link("#{match.url}/props-v-state") { 'Props v. State' } }
    end
    Route("#{match.url}/:topic_id", mounts: Topic)
    Route(match.url, exact: true) do
      H3 { 'Please select a topic.' }
    end
  end
end

class Topic
  include Hyperstack::Component
  include Hyperstack::Router::Helpers

  render(:div) do
    H3 { match.params[:topic_id] }
  end
end