DOM范围克隆不受DOM更改的影响 [英] DOM Range clones are not immune to DOM changes

问题描述

我正在使用cloneRange（）函数克隆DOM Range。如果然后我像这样修改原始范围对象：

I am making a clone of a DOM Range using cloneRange() function. If I then modify the original range object like this:

range.setStart(range.startContainer, 1);

克隆将按预期保留旧的 startOffset 。

The clone preserves the old startOffset as expected.

但是，如果我修改DOM树，则克隆的 startOffset 也将受到影响。

However, if I modify the DOM tree, then the clone's startOffset will also get affected. Is there an intentional internal wiring between the DOM tree and all ranges that are associated with it (clones included)?

JS小提琴示例

推荐答案

是的。在 DOM 2级范围规范。最新的 DOM4范围规范在变异​​算法部分（感谢RobG指出了这一点）。

Yes, there is. What happens to ranges under DOM mutation is specified in the DOM Level 2 Range specification. The more recent DOM4 Range specification specifies this under the mutation algorithms section (thanks to RobG for pointing that out).

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