cecchi / Grapnel.js

The smallest (1100 bytes gzipped!) JavaScript Router with Named Parameters

Grapnel.js

The smallest (1100 bytes gzipped!) JavaScript Router with Named Parameters & Event Listening. Lots of other Features too!

Features & Basic Usage

Router

var router = new Grapnel();

router.get('products/:category/:id?', function(req){
    var id = req.params.id,
        category = req.params.category;
    // GET http://mysite.com/#products/widgets/134
    console.log(category, id);
    // => widgets 134
});

Named Parameters

Grapnel.js supports regex style routes similar to Sinatra or Express. The properties are mapped to the parameters in the request.

router.get('products/:id?', function(req){
    // GET /file.html#products/134
    req.params.id
    // => 134
});

router.get('products/*', function(req){
    // The wildcard/asterisk will match anything after that point in the URL
    // Parameters are provided req.params using req.params[n], where n is the nth capture
});

Declaring Multiple Routes

var routes = {
    'products' : function(req){
        // GET /file.html#products
    },
    'products/:category/:id?' : function(req){
        // GET /file.html#products/widgets/35
        req.params.category
        // => widgets
    }
}

Grapnel.listen(routes);

Event Handling

var router = new Grapnel();

router.on('hashchange', function(event){
    // GET /file.html#products
    console.log('Anchor changed to %s', this.anchor.get());
    // => Anchor changed to products
});

RegExp Support

Grapnel.js allows RegEx when defining a route:

var expression = /^food\/tacos\/(.*)$/i;
var router = new Grapnel();

router.get(expression, function(req, event){
    // GET http://mysite.com/page#food/tacos/good
    console.log('I think tacos are %s.', req.params[0]);
    // => "He thinks tacos are good."
});

Route Context

You can even add context to a route:

var router = new Grapnel();
var foodRoute = router.context('food');

foodRoute(':foodname', function(req, event){
    // GET /file.html#food/tacos
    req.params.foodname
    // => This taco thing is getting out of hand.
});

RequireJS/AMD and CommonJS Compatibility

require(['lib/grapnel'], function(Grapnel){

    var router = new Grapnel();

    router.bind('hashchange', function(){
        console.log('It works!');
    });

});

 

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Documentation

Installation

bower install grapnel

Basic Configuration

var router = new Grapnel.Router();

Or you can declare your routes with a literal object:

Grapnel.listen({
    'products/:id' : function(req){
        // Handler
    }
});

Methods

get Adds a new route listener

/**
 * @param {String|RegExp} path
 * @param {Function} callback
*/
router.get('store/:category/:id?', function(req, event){
    var category = req.params.category,
        id = req.params.id;

    console.log('Product #%s in %s', id, category);
});

bind Adds a new event listener

/**
 * @param {String|Array} event
 * @param {Function} callback
*/
router.bind('hashchange', function(event){
    console.log('Grapnel.js works!');
});

on An alias of bind

add An alias of get

anchor

• defaultHash Static anchor during initialization
• set Sets a new absolute anchor
• get Get absolute anchor
• clear Clears the anchor
• reset Resets the anchor to its original state when it was loaded

Events

match Fires when a new match is found, but before the handler is called

hashchange Fires when hashtag is changed

Stopping a Route Event

router.on('match', function(event){
    event.preventDefault(); // Stops propagation of the event
});

License

MIT License