t

jshelpers

UndefOrCommon

trait UndefOrCommon[A] extends AnyRef

Add Option-like methods to js.UndefOr. Note that js.Undef.orNull exists in scala.js 1.0

Linear Supertypes
AnyRef, Any
Known Subclasses
JsUndefOrBooleanOps, JsUndefOrOps, JsUndefOrStringOps
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Inherited
  1. UndefOrCommon
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Visibility
  1. Public
  2. Protected

Abstract Value Members

  1. abstract def a: UndefOr[A]

Concrete Value Members

  1. def !?[B >: A](default: => B): B

    Same as .getOrElse just shorter.

    Same as .getOrElse just shorter.

    Annotations
    @inline()
  2. def ??[B >: A](default: => B): B

    Same as .getOrElse just shorter.

    Same as .getOrElse just shorter.

    Annotations
    @inline()
  3. def as[B]: UndefOr[B]

    Changes what's inside but preserves UndefOr.

  4. def filterNull: UndefOr[A]

    null => undefined, else the value remains.

  5. def filterTruthy: UndefOr[A]

    Keep the value if its truthy, otherwise return undefined.

  6. def isNull: Boolean

    Tests for overall nullness which is different than .isEmpty|.nonEmpty.

  7. def isTotalEmpty: Boolean

    This may override UndefOr.isEmpty but this checks for null as well.

  8. def toNonNullOption: Option[A]

    This could also be _.toOption.filter(_ != null) but below is slightly faster.

  9. def toNull: |[A, Null]

    Convert UndefOr[A] => A|Null

  10. def toStringJs: String

    Calls toString.

    Calls toString. I'm not sure this is needed at all.

  11. def toTruthy: Boolean

    Equivalent to !!someJSValue

  12. def toUndefOrNull: UndefOr[|[A, Null]]

    Uh-oh, thought it was js.UndefOr[A] but you need to say its a js.UndefOr[A|Null] because the docs were wrong :-).

    Uh-oh, thought it was js.UndefOr[A] but you need to say its a js.UndefOr[A|Null] because the docs were wrong :-).

    Annotations
    @inline()