Lernen und verstehen Sie gemeinsam den Vue-Quellcode

var directives = {}; //指令集合var vNodes = new Array(); //解析的Dom集合var dataModel = {
    name:"name",
    title: "title"}; //数据Modelvar Watch = {
    isInit: false,
    watchs: new Array(),
    run: function(newValue, expOrfn){ var self = this;if(!self.isInit){
            expOrfn.call(vModel);
        }this.watchs.map(function(data,index){
            data.nodes.map(function(d,i){if(self.isInit){
                    d.directive.init(newValue, d, data); //绑定初始化值， 以及初始化一些事件}else{
                    d.directive.update(newValue, d, data); //只更新值，此时run的调用来值value-set                }
            });
        });
        
        self.watchs = [];
    },
    push:function(watch){this.watchs.push(watch);
    }
} //任务管理

directives.text = { 
    init: function(value, vNode){
        vNode.elm.textContent = value;
    },
    update: function(value, vNode){
        vNode.elm.textContent = value;
    }
}//需要响应事件的怎么办directives.model ={ 
    init: function(value, vNode, _watch){
        vNode.elm.value = value; //判断自己发生的改变，不应该再改变自己 vNode.elm.addEventListener('keyup',function(evt){
            vNode.model[_watch.key] = vNode.elm.value;
        }); 
    },
    update:function(){

    }   
}

//转换vModel，暂支持一级var properties = Object.getOwnPropertyNames(dataModel);var vModel = {}, formSetting = false;for( var index in properties){ 
    (function refreshData(_index){var key = properties[_index];var property = Object.getOwnPropertyDescriptor(dataModel, key);var setter = property.set;var getter = property.get;var _val = property.value;var _getter = function(){var val = getter ? getter.call(vModel) : _val;//收集依赖，与watch要分开            Watch.push({
                key: key,
                nodes: vNodes.filter(function(data,index){return data.modelKey == key ? true : false;
                }),
                getter: _getter
            });return val;
        };
        Object.defineProperty(vModel, key, {
            configurable: true,
            enumerable: true,
            set: function(value){if(setter){
                    setter.call(vModel, value);
                } //处理依赖                Watch.run(value, _getter);//this.value = value;            },
            get: _getter

        })
    })(index);
}

//解析vNodesvar app = document.getElementById('app');
app.childNodes.forEach(function(data,index){if(data.nodeType != 1) return;var hv = data.getAttribute('data-hv');var hvs = hv.split(',');
    hvs.forEach(function(item,row){var keyValue = item.split(':'); //vNode对象上一定要有model，这是方便vNode相应时候的找vModel        vNodes.push({
            directive: directives[keyValue[0]],
            modelKey: keyValue[1],
            model: vModel,
            elm: data
        });
    });
});

//调用所有的get一次Watch.isInit = true;var _keys = Object.getOwnPropertyNames(vModel);
_keys.map(function(key,data){var data = vModel[key];
    Watch.run(data); 
});
Watch.isInit = false;