Function mergeClassData

vue.js:7508–7516

(child, parent)

    //合并calss数据
    function mergeClassData(child, parent) {

        return {
            staticClass: concat(child.staticClass, parent.staticClass), //静态calss
            class: isDef(child.class)  //data中动态calss
                ? [child.class, parent.class]
                : parent.class
        }
    }

    //渲染calss 这里获取到已经转码的calss
    function renderClass(