dom-events/index.js

dom event binding and triggering

var synth = require('synthetic-dom-events');

var on = function(element, name, fn, capture) {
    return element.addEventListener(name, fn, capture || false);
};

var off = function(element, name, fn, capture) {
    return element.removeEventListener(name, fn, capture || false);
};

var once = function (element, name, fn, capture) {
    function tmp (ev) {
        off(element, name, tmp, capture);
        fn(ev);
    }
    on(element, name, tmp, capture);
};

var emit = function(element, name, opt) {
    var ev = synth(name, opt);
    element.dispatchEvent(ev);
};

if (!document.addEventListener) {
    on = function(element, name, fn) {
        return element.attachEvent('on' + name, fn);
    };
}

if (!document.removeEventListener) {
    off = function(element, name, fn) {
        return element.detachEvent('on' + name, fn);
    };
}

if (!document.dispatchEvent) {
    emit = function(element, name, opt) {
        var ev = synth(name, opt);
        return element.fireEvent('on' + ev.type, ev);
    };
}

module.exports = {
    on: on,
    off: off,
    once: once,
    emit: emit
};