Question

以下代码有效，但是我是否存在导致循环引用或内存泄漏的风险？

/* core package */
var core = function() {
    // Throw an error, the core package cannot be instantiated.
    throw new Error('A package cannot be instantiated.');
};

core.Container = function (properties){
    this.constructor = this;
    this.id = null;
    if ('id' in properties)
        this.id = properties['id'];
    else 
        throw new Error('A container must have an id.');
}
core.Container.prototype = new Object();

var container = new core.Container({'id': 'container'});
alert(container instanceof core.Container); // Result is true

Answer 1

分配

时

core.Container.prototype = new Object();

new core.Container 实例被指定为Object作为其构造函数 -

这个只引用构造函数本身，其构造函数应该是Function。

分配core.Container.prototype.constructor=core.Container

Answer 2

由@Raynos在chat

中发布

@Utilitron取决于泄漏的含义我们是在谈论泄漏 IE6中不错的引擎或泄漏代码在v8中不应泄漏

设置this.constructor = this会导致循环引用/内存泄漏

2 个答案: