节点克隆和删除
当克隆节点未附加到任何 DOM 时会发生什么。假设我有一段 JavaScript 代码，每次调用它的方法时都会克隆一个 DOM 元素。我暂时需要这个对象，我不需要将它添加到 DOM 组件中。但我担心它是否会在客户端产生性能问题，所以我想知道由 javascript 克隆的对象会发生什么。
What happens when a cloned node is not attached to any DOM. Suppose I have a JavaScript code Clone a DOM element every time it's method is called.I need this object temporarily, I don't need to add it to DOM component. But I am worried if it creates performance issue in client side so I am wondering what happens to the object cloned by javascript.
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这取决于您如何分配克隆，但它们可能会在内存中累积。
没有代码=不知道。
It depends on how you are assigning the clone, but it's possible they could accumulate in memory.
No code = no idea.
一旦 JavaScript 引擎检测到您已完成该对象，它的垃圾收集器就会为您清理它。只要该对象不在全局范围内或者能够被引用，它就会在垃圾收集器传递中被清除。
As soon as the JavaScript Engine detects you are done with that object its garbage collector will clean it up for you. As long as the object isn't in the global scope or is able to be referenced it will be cleaned on a garbage collector pass.