Quoting my previous entry:
Currently in beta stage, but it is used already in couple projects, such as one of my client’s internal android mobile app or as a SPA framework for inku.js interface.
Rakun.js has 3 basic functionalities:
- Route management,
- State management,
- Automatically binds
hashchangeevent on the browser with created Rakun.js instance.
For the app’s sake - use only one instance of Rakun.js in Your application.
First, include the Rakun.js source code file (I recommend using minified version, which You can get here):
Now let’s create new Rakun Router instance using
And that’s it! We’ve already setup the very basic Rakun.js app. It now will automatically add
#/ to the end of the url on page load (if necessary/missing).
Now, let’s create our first Rakun.js state:
name [string] param is required. If we want to pass
data to our state, we have to remember that it should be a function that returns anything.
Why is that?
rakunInstance has also a method to find state -
findState, which takes two params:
stateName [string]- name of the state that we want to find,
getValue [bool]- if is set to
falseor not provided,
findStatereturns whole state object, but when is set to
true, it evaluates state’s data function and returns directly its value.
But where are those states stored?
Every instance of Rakun.js has
stateBox [array] property, which contains all states created by given instance.
The same applies to routes (
routeBox [array]), which will be our next topic.
Let’s create our home route:
Above code sums up pretty everything route-related.
Rakun.js doesn’t support nested route names - You should use flat routing, e.g.:
/users/- for getting list of users,
/user/1/- for getting user with id that equals to 1,
/user-update/1/- for updating user with given id
In the last example You probably would like to use url like
/user/1/update/ - Rakun.js splits route url and searches for route between first and second slash (based on given example above it will be
Keep in mind to define all route urls with the slash character in the beginning and at the end of it.
I’ve decided to implement such approach bacause of keeping Rakun.js as flexible as possible, so every developer can parse the url params in a way he/she want.
When creating new route, those fields are required:
name [string]- name of the route,
url [string]- main url of the route (without nesting),
wrapper [string]- id of the dom element in document, where route template should be rendered,
template [string]- HTML to render in route
Now, let’s go back to creation of our new
home route and analyze that code:
urlparams is pretty straightforward,
wrappermust equal to id of ALREADY EXISTING DOM element,
everything we bind to
beforeRenderproperty, must be a
[function]and will be evaluated BEFORE rendering route template into HTML.
You can e.g. fetch data from remote API here, then get partial template and finally merge it together using e.g. Handlebars template plugin.
I’m using this also to authenticate user permissions before rendering anything.
afterRenderis very similar to
beforeRender- it has to be a
[function]and will be evaluated AFTER route template rendering.
You can define here e.g. all event bindings (
template- You can also do here everything I’ve mentioned in
beforeRenderexample or just pass static HTML template.
Here’s the list of all
rakunRouter object details:
new Rcn()- creates new Rakun.js instance,
rakunInstance.newRouter()- creates new router instance,
rakunInstance.stateBox- all states are stored here as an
rakunInstance.routeBox- all routes are stored here as an
rakunInstance.newState- creates new state object and add it to
rakunInstance.findState- searches for state by given state name, if second argument is set to
true, it returns state’s data value instead of whole state object,
rakunInstance.removeState- removes state from
stateBoxarray, base on given state name,
rakunInstance.updateState- updates state by given state name and new state
routerInstance.newRoute- creates new route object and adds it to
routerInstance.findRoute()- searches for route with given route name or url,
routerInstance.findRouteByUrl()- searches for route by given route url,
routerInstance.findRouteByName()- searches for route by given route name,
routerInstance.redirect()- redirects application to other route by give route name
If You’re curious You’ll probably find couple other methods in un-minified version of Rakun.js. I’ve decided to not mention them here yet, because they’re in very experimental state at the moment.
And that’s all for now! I hope this post introduced You properly to start developing new app using Rakun.js :)
If You have any questions, feel free to add a comment below, or tweet to me directly.