Function pruneCacheEntry

vue.js:7209–7222

(cache, //缓存对象
        key, //单个key
        keys, //多个key
        current //当前虚拟dom
    )

    //检测缓存中的组件，如果不是当前激活的组件则销毁
    function pruneCacheEntry(cache, //缓存对象
        key, //单个key
        keys, //多个key
        current //当前虚拟dom
    ) {
        var cached$$1 = cache[key]; //获取值遍历中的值
        if (cached$$1 && (!current || cached$$1.tag !== current.tag)) {
            //判断遍历中的值 如果不等于当前活跃的组件则让他销毁
            cached$$1.componentInstance.$destroy();
        }

        cache[key] = null;
        remove(keys, key);
    }

    var patternTypes = [String, RegExp, Array]; //类型