luy/dist/Refs.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.setRef = setRef;
exports.clearRefs = clearRefs;

var _utils = require('./utils');

function setRef(Vnode, instance, domNode) {
    if (instance) {
        var refType = (0, _utils.typeNumber)(Vnode.ref);
        if (refStrategy[refType]) {
            refStrategy[refType](Vnode, Vnode.owner, domNode);
        }
    }
}

function clearRefs(refs) {
    if (typeof refs === 'function') {
        refs(null);
    } else {
        for (var refName in refs) {
            refs[refName] = null;
        }
    }
}

var refStrategy = {
    3: function _(Vnode, instance, domNode) {
        if (Vnode._instance) {
            instance.refs[Vnode.ref] = Vnode._instance;
        } else {
            instance.refs[Vnode.ref] = domNode;
        }
    },
    4: function _(Vnode, instance, domNode) {
        refStrategy[3](Vnode, instance, domNode);
    },
    5: function _(Vnode, instance, domNode) {
        if (Vnode._instance) {
            Vnode.ref(Vnode._instance);
        } else {
            Vnode.ref(domNode);
        }
    }
};