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Update UsingObjectSpreadOperator.md #3367

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3 changes: 3 additions & 0 deletions docs/recipes/UsingObjectSpreadOperator.md
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Expand Up @@ -64,3 +64,6 @@ While the object spread syntax is a [Stage 4](https://github.com/tc39/proposal-o
"plugins": ["transform-object-rest-spread"]
}
```
> ##### Note on Object Spread Operator

> Like the Array Spread Operator, the Object Spread Operator creates a [shallow clone](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Spread_syntax#Spread_in_object_literals) of the original object. In other words, for multidimensional source objects, elements in the copied object at a depth greater than one are mere references to the source object (with the exception of [primitives](https://developer.mozilla.org/en-US/docs/Glossary/Primitive), which are copied). Thus, you cannot reliably use the Object Spread Operator (`...`) for deep cloning objects.