ObjectId.valueOf()
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ObjectId.valueOf()Returns the value of the
ObjectId()as a lowercase hexadecimal string. This value is thestrattribute of theObjectId()object.
Example
The following example calls the valueOf() method on an ObjectId():
ObjectId("507c7f79bcf86cd7994f6c0e").valueOf()
This will return the following string:
507c7f79bcf86cd7994f6c0e
You can confirm the type of this object using the following operation:
typeof ObjectId("507c7f79bcf86cd7994f6c0e").valueOf()