Conforms To

Requirements

• Export conformsTo as named and default. Accept a record and a source record mapping property names to synchronous predicates.
• Inspect own enumerable string keys of source in Object.keys order. Every such key must be an own property of the input; inherited values do not count.
• Call each predicate with that property value as its only argument. Explicit undefined counts as present. Coerce predicate results to Boolean.
• Return false at the first missing property or falsy predicate result, without evaluating later predicates. Empty source returns true. Propagate predicate errors and do not mutate either record.
• Symbol keys, asynchronous predicates, getters with side effects, and invalid non-function source entries are outside scope.

Examples

Input: conformsTo({ age: 24 }, { age: n => n >= 18 })
Output: true

Input: conformsTo({ age: 12 }, { age: n => n >= 18 })
Output: false