Function filter

filter<T, S>(
predicate: (value: T, context: OperatorContext) => value is S,
): Operator<T, S>
Emits only values for which predicate returns true.

Predicates run sequentially and may be asynchronous. Synchronous type guard predicates narrow the output stream type.
Type Parameters
- T
- S
Parameters
- predicate: (value: T, context: OperatorContext) => value is S
Returns Operator<T, S>
filter<T>(
    predicate: (
        value: T,
        context: OperatorContext,
    ) => boolean | PromiseLike<boolean>,
): Operator<T, T>
Emits only values for which predicate returns true.

Predicates run sequentially and may be asynchronous. Synchronous type guard predicates narrow the output stream type.
Type Parameters
- T
Parameters
- predicate: (value: T, context: OperatorContext) => boolean | PromiseLike<boolean>
Returns Operator<T, T>