Undocumented type "*" should be avoided

[t2ym]

Undocumented type "*" should be avoided

Backgrounds

• "*" type copies the reference to the value without validation
• Even a function can be assigned

Workarounds

• Use combination of other types such as "null|boolean|number|string" instead
• "object" type just copies the reference to the original object without validation

Notes

• If initProperties is created via JSON.parse(), the risk of using the "*" type is largely mitigated.

Other Mitigation Candidates

• Defining specific types is the best practice, considering the objective of schema definitions.
• Introducing a new type or an option to clone untyped objects via JSON.parse(JSON.stringify(value)) might be effective to mitigate unexpected corruption of the object in validation.