Packages

  • package root
    Definition Classes
    root
  • package scala
    Definition Classes
    root
  • package scalajs
    Definition Classes
    scala
  • package concurrent
    Definition Classes
    scalajs
  • package js

    Types, methods and values for interoperability with JavaScript libraries.

    Types, methods and values for interoperability with JavaScript libraries.

    This package is only relevant to the Scala.js compiler, and should not be referenced by any project compiled to the JVM.

    Guide

    General documentation on Scala.js is available at http://www.scala-js.org/doc/.

    Overview

    The trait js.Any is the root of the hierarchy of JavaScript types. This package defines important subtypes of js.Any that are defined in the standard library of ECMAScript 5.1 (or ES 6, with a label in the documentation), such as js.Object, js.Array and js.RegExp.

    Implicit conversions to and from standard Scala types to their equivalent in JavaScript are provided. For example, from Scala functions to JavaScript functions and back.

    The most important subtypes of js.Any declared in this package are:

    The trait js.Dynamic is a special subtrait of js.Any. It can represent any JavaScript value in a dynamically-typed way. It is possible to call any method and read and write any field of a value of type js.Dynamic.

    There are no explicit definitions for JavaScript primitive types, as one could expect, because the corresponding Scala types stand in their stead:

    • Boolean is the type of primitive JavaScript booleans
    • Double is the type of primitive JavaScript numbers
    • String is the type of primitive JavaScript strings (or null)
    • Unit is the type of the JavaScript undefined value
    • Null is the type of the JavaScript null value

    js.UndefOr gives a scala.Option-like interface where the JavaScript value undefined takes the role of None.

    A | B is an unboxed pseudo-union type, suitable to type values that admit several unrelated types in facade types.

    Definition Classes
    scalajs
  • package niocharset
    Definition Classes
    scalajs
  • package reflect
    Definition Classes
    scalajs
  • LinkingInfo
o

scala.scalajs

LinkingInfo

object LinkingInfo

Linear Supertypes
AnyRef, Any
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Inherited
  1. LinkingInfo
  2. AnyRef
  3. Any
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Visibility
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Value Members

  1. final def !=(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  2. final def ##(): Int
    Definition Classes
    AnyRef → Any
  3. final def ==(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  4. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  5. def assumingES6: Boolean

    Returns true if we are assuming that the target platform supports ECMAScript 6, false otherwise.

    Returns true if we are assuming that the target platform supports ECMAScript 6, false otherwise.

    This ends up being constant-folded to a constant at link-time. So constant-folding, inlining, and other local optimizations can be leveraged with this "constant" to write polyfills that can be dead-code-eliminated.

    A typical usage of this method is:

    if (assumingES6 || featureTest())
  useES6Feature()
else
  usePolyfill()

    At link-time, assumingES6 will either be a constant false, in which case the above snippet folds into

    if (featureTest())
  useES6Feature()
else
  usePolyfill()

    or a constant true, in which case it folds into

    useES6Feature()
    Annotations
    @inline()
  6. def clone(): AnyRef
    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  7. def developmentMode: Boolean

    Returns true if we are linking for development, false otherwise.

    Returns true if we are linking for development, false otherwise.

    developmentMode is always equal to !productionMode.

    This ends up being constant-folded to a constant at link-time. So constant-folding, inlining, and other local optimizations can be leveraged with this "constant" to write code that should only be executed in production mode or development mode.

    A typical usage of this method is:

    if (developmentMode) {
  performExpensiveSanityChecks()
}

    At link-time, developmentMode will either be a constant true, in which case the above snippet folds into

    performExpensiveSanityChecks()

    or a constant false, in which case it is dead-code-eliminated away, yielding maximum performance in production.

    Annotations
    @inline()
    See also

    productionMode

  8. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  9. def equals(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  10. def finalize(): Unit
    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )
  11. final def getClass(): Class[_]
    Definition Classes
    AnyRef → Any
  12. def hashCode(): Int
    Definition Classes
    AnyRef → Any
  13. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  14. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  15. final def notify(): Unit
    Definition Classes
    AnyRef
  16. final def notifyAll(): Unit
    Definition Classes
    AnyRef
  17. def productionMode: Boolean

    Returns true if we are linking for production, false otherwise.

    Returns true if we are linking for production, false otherwise.

    productionMode is always equal to !developmentMode.

    This ends up being constant-folded to a constant at link-time. So constant-folding, inlining, and other local optimizations can be leveraged with this "constant" to write code that should only be executed in production mode or development mode.

    A typical usage of this method is:

    val warningsLogger =
  if (productionMode) new NullLogger
  else new ConsoleLogger

    At link-time, productionMode will either be a constant true, in which case the above snippet folds into

    val warningsLogger = new NullLogger

    or a constant false, in which case it folds into

    val warningsLogger = new ConsoleLogger.
    Annotations
    @inline()
    See also

    developmentMode

  18. final def synchronized[T0](arg0: ⇒ T0): T0
    Definition Classes
    AnyRef
  19. def toString(): String
    Definition Classes
    AnyRef → Any
  20. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  21. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  22. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

Inherited from AnyRef

Inherited from Any

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