luy/dist/event.js

所谓类```React```框架就是**和React用法一模一样**的框架。其实当初制造这个框架的目的是为了能更好的学习React内部结构，了解其原理而制作的玩具。但是随着框架的渐渐成长，代码越来越多，我还是决定将其发展下去. 

"use strict";

Object.defineProperty(exports, "__esModule", {
    value: true
});
exports.SyntheticEvent = SyntheticEvent;

/**事件合成，暂时这么写 */
function SyntheticEvent(event) {
    if (event.nativeEvent) {
        return event;
    }
    for (var i in event) {
        if (!eventProto[i]) {
            this[i] = event[i];
        }
    }
    if (!this.target) {
        this.target = event.srcElement;
    }
    this.fixEvent();
    this.timeStamp = new Date() - 0;
    this.nativeEvent = event;
}

var eventProto = SyntheticEvent.prototype = {
    fixEvent: function fixEvent() {}, //留给以后扩展用
    preventDefault: function preventDefault() {
        var e = this.nativeEvent || {};
        e.returnValue = this.returnValue = false;
        if (e.preventDefault) {
            e.preventDefault();
        }
    },
    fixHooks: function fixHooks() {},
    stopPropagation: function stopPropagation() {
        var e = this.nativeEvent || {};
        e.cancelBubble = this._stopPropagation = true;
        if (e.stopPropagation) {
            e.stopPropagation();
        }
    },
    persist: function noop() {},
    stopImmediatePropagation: function stopImmediatePropagation() {
        this.stopPropagation();
        this.stopImmediate = true;
    },
    toString: function toString() {
        return "[object Event]";
    }
};