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/**
* Bind `el` event `type` to `fn`.
*
* @param {Element} el
* @param {String} type
* @param {Function} fn
* @param {Boolean} capture
* @return {Function}
* @api public
*/
exports.bind = function(el, type, fn, capture) {
if (el.addEventListener) {
el.addEventListener(type, fn, capture || false);
} else {
el.attachEvent('on' + type, fn);
}
return fn;
};
/**
* Unbind `el` event `type`'s callback `fn`.
*
* @param {Element} el
* @param {String} type
* @param {Function} fn
* @param {Boolean} capture
* @return {Function}
* @api public
*/
exports.unbind = function(el, type, fn, capture) {
if (el.removeEventListener) {
el.removeEventListener(type, fn, capture || false);
} else {
el.detachEvent('on' + type, fn);
}
return fn;
};
exports.emit = function(el, name, opts) {
opts = opts || {};
var type = typeOf(name);
var ev = document.createEvent(type + 's');
// initKeyEvent in firefox
// initKeyboardEvent in chrome
var init = typeof ev['init' + type] === 'function'
? 'init' + type : 'initEvent';
var sig = initSignatures[init];
var args = [];
var used = {};
opts.type = name;
for (var i = 0; i < sig.length; ++i) {
var key = sig[i];
var val = opts[key];
// if no user specified value, then use event default
if (val === undefined) {
val = ev[key];
}
args.push(val);
}
ev[init].apply(ev, args);
// attach remaining unused options to the object
for (var key in opts) {
if (!used[key]) {
ev[key] = opts[key];
}
}
return el.dispatchEvent(ev);
};
var initSignatures = require('./init.json');
var types = require('./types.json');
var typeOf = (function () {
var typs = {};
for (var key in types) {
var ts = types[key];
for (var i = 0; i < ts.length; i++) {
typs[ts[i]] = key;
}
}
return function (name) {
return typs[name] || 'Event';
};
})();