Gets all children from this DOM Elements node, using querySelectorAll('*') and then iterates through
them, looking for the first one that has a matching id. It then returns this child if found, or null if not.
Be aware that class and id names are case-sensitive.
| name | type | description |
|---|---|---|
| id | string |
The id to search the children for. |
The first matching child DOM Element, or null if not found.