Dispatcher is a small JavaScript library that automatically calls your functions when page is loaded. It was primary written to be used by Rails applications, but it will work with any web page you have.
Dispatcher requires jQuery.
If you're using Rails, you can create a .bowerrc file like the following:
{
"directory": "app/assets/components"
}Then create a bower.json like this:
{
"name": "myapp",
"version": "0.0.1",
"private": true,
"dependencies": {}
}Install your dependency with bower install dispatcher.
$ bower install dispatcher
bower dispatcher#* cached git://github.com/fnando/dispatcher-js.git#0510770257
bower dispatcher#* validate 0510770257 against git://github.com/fnando/dispatcher-js.git#*
bower dispatcher#* new version for git://github.com/fnando/dispatcher-js.git#*
bower dispatcher#* resolve git://github.com/fnando/dispatcher-js.git#*
bower dispatcher#* download https://github.com/fnando/dispatcher-js/archive/v0.1.0.tar.gz
bower dispatcher#* extract archive.tar.gz
bower dispatcher#* resolved git://github.com/fnando/dispatcher-js.git#0.1.0
bower dispatcher#~0.1.0 install dispatcher#0.1.0
Add the following lines to your application.js:
//= require jquery
//= require dispatcherTo dispatch a given JavaScript for a page, you can use the Dispatcher.run(app, route) function.
The app object can be something like this:
var app = {
site: {
index: function() {
console.log("Welcome to the home page");
}
}
};To manually trigger this route, just call the Dispatcher.run function like the following:
Dispatcher.run(app, "site#index");You'll probably do this when the document is ready.
$(document).ready(function(){
Dispatcher.run(app, "site#index");
});The route string will be defined by your server-side app. In Rails, you can create a helper like the following:
def dispatcher_route
controller_name = controller_path.gsub(/\//, "_")
"#{controller_name}##{action_name}"
endThen you can output it in your <body>:
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<body data-route="<%= dispatcher_route %>">
</body>
</html>Finally, you can trigger the route with the following snippet:
$(document).ready(function(){
Dispatcher.run(app, $("body").data("route"));
});Instead of doing this wrapper manually, you can call Dispatcher.init, which receives an application and binds to the document's ready and page:load events. There's no need to wrapper in a jQuery initialize, since this done internally.
Dispatcher.init(app);The latest release allows you to provide any object as your application. If you want the old behavior back, please read the "Using the compat mode" section.
If you want to trap all missing routes, just define the routeNotFound() callback.
var app = {
routeNotFound: function(controller, action) {
console.log("Route not found:", controller, action);
}
};You can set functions to be execute before and after the actual route. For global callbacks, you can set the following attributes:
var app = {
before: function() {},
after: function() {}
};You can also set these callbacks for each controller:
var app = {
site: {
before: function() {},
after: function() {}
}
};Add the following lines to your application.js:
//= require jquery
//= require dispatcher
//= require dispatcher/compatTo bring the old behaviour back, add a meta tag called page. This tag should have the controller and action names like the following.
<meta name="page" content="users#index" />Rails developers can use the helpers below:
def dispatcher_route
controller_name = controller_path.gsub(/\//, "_")
"#{controller_name}##{action_name}"
end
def dispatcher_tag
tag(:meta, {name: "page", content: dispatcher_route}, true)
endYour application must be defined as a global variable called App.
App.users = {};
App.users["index"] = function() {
// execute specific code for users/index
};
App.users["new"] = function() {
// execute specific code for users/new
}The same before and after callbacks are available here.
Dispatcher works with Turbolinks. You don't have to do anything special and, to be frank, the code is exactly the same. You just need to set up the data-route attribute in your <body> element.
var MyApp = {
site: {
index: function() {
console.log("Welcome to the home page");
}
}
};
Dispatcher.init(MyApp);<body data-route="<%= dispatcher_route %>"></body>Some action names are aliased:
updatewill map toedit.createwill map tonew.destroywill map toremove.
== License
(The MIT License)
Copyright © 2011-2015 Nando Vieira (http://nandovieira.com.br)
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the ‘Software’), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED ‘AS IS’, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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