Robin North 8ef195f9ac Fix DOMException in switchElementsAlt() ...

Clone attribute nodes before setting on `oldEl` to prevent the following error:

```
DOMException: Failed to execute 'setNamedItem' on 'NamedNodeMap': The node provided is an attribute node that is already an attribute of another Element; attribute nodes must be explicitly cloned.
```

2018-01-17 19:12:12 +00:00

4.5 KiB

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