
/**
 * Module dependencies.
 */

var matches = require('matches-selector')
  , event = require('event');

/**
 * Delegate event `type` to `selector`
 * and invoke `fn(e)`. A callback function
 * is returned which may be passed to `.unbind()`.
 *
 * @param {Element} el
 * @param {String} selector
 * @param {String} type
 * @param {Function} fn
 * @param {Boolean} capture
 * @return {Function}
 * @api public
 */

exports.bind = function(el, selector, type, fn, capture){
  return event.bind(el, type, function(e){
    if (matches(e.target, selector)) fn(e);
  }, capture);
};

/**
 * Unbind event `type`'s callback `fn`.
 *
 * @param {Element} el
 * @param {String} type
 * @param {Function} fn
 * @param {Boolean} capture
 * @api public
 */

exports.unbind = function(el, type, fn, capture){
  event.unbind(el, type, fn, capture);
};


/**
 * Module dependencies.
 */

var matches = require('matches-selector')
  , event = require('event');

/**
 * Delegate event `type` to `selector`
 * and invoke `fn(e)`. A callback function
 * is returned which may be passed to `.unbind()`.
 *
 * @param {Element} el
 * @param {String} selector
 * @param {String} type
 * @param {Function} fn
 * @param {Boolean} capture
 * @return {Function}
 * @api public
 */

exports.bind = function(el, selector, type, fn, capture){
  return event.bind(el, type, function(e){
    if (matches(e.target, selector)) fn.call(el, e);
  }, capture);
};

/**
 * Unbind event `type`'s callback `fn`.
 *
 * @param {Element} el
 * @param {String} type
 * @param {Function} fn
 * @param {Boolean} capture
 * @api public
 */

exports.unbind = function(el, type, fn, capture){
  event.unbind(el, type, fn, capture);
};

Use `call()` to correctly assign `this` in handler
Use `call()` to correctly assign `this` in handler

The handler function's `this` should refer to the element to which the
listener is bound, rather than the `window` object. This also ensures
that `this` is equal to `e.currentTarget`.
