japgolly.scalajs.react.extra

Reusability

Related Docs: object Reusability | package extra

final class Reusability[A] extends AnyVal

Tests whether one instance can be used in place of another. Used mostly to compare properties and state of a component to avoid unnecessary updates.

If you imagine a class with 8 fields, equality would compare all 8 fields where as this would typically just compare the ID field, the update-date, or the revision number. You might think of this as a very quick version of equality.

Don't miss Reusability.shouldComponentUpdate which can be applied to a component via ReactComponentB.configure.

Since

0.9.0

Linear Supertypes
AnyVal, Any
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Instance Constructors

  1. new Reusability(test: (A, A) ⇒ Boolean)

Value Members

  1. final def !=(arg0: Any): Boolean

    Definition Classes
    Any

  2. final def ##(): Int

    Definition Classes
    Any

  3. final def ==(arg0: Any): Boolean

    Definition Classes
    Any

  4. final def asInstanceOf[T0]: T0

    Definition Classes
    Any

  5. def contramap[B](f: (B) ⇒ A): Reusability[B]

  6. def getClass(): Class[_ <: AnyVal]

    Definition Classes
    AnyVal → Any

  7. final def isInstanceOf[T0]: Boolean

    Definition Classes
    Any

  8. def narrow[B <: A]: Reusability[B]

  9. val test: (A, A) ⇒ Boolean

  10. def testNot: (A, A) ⇒ Boolean

  11. def toString(): String

    Definition Classes
    Any

Inherited from AnyVal

Inherited from Any

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