Kotlin Standard Library

The Kotlin Standard Library provides living essentials for everyday work with Kotlin. These include:

  • Higher-order functions implementing idiomatic patterns (let, apply, use, synchronized, etc).
  • Extension functions providing querying operations for collections (eager) and sequences (lazy).
  • Various utilities for working with strings and char sequences.
  • Extensions for JDK classes making it convenient to work with files, IO, and threading.

Packages

Common
JVM
JS
Native
1.0

kotlin

Core functions and types, available on all supported platforms.

Common
JVM
JS
Native
1.0

kotlin.annotation

Library support for the Kotlin annotation facility.

JS
1.1

kotlin.browser

Access to top-level properties (document, window etc.) in the browser environment.

Common
JVM
JS
Native
1.0

kotlin.collections

Collection types, such as Iterable, Collection, List, Set, Map and related top-level and extension functions.

Common
JVM
JS
Native
1.0

kotlin.comparisons

Helper functions for creating Comparator instances.

JVM
1.0

kotlin.concurrent

Utility functions for concurrent programming.

Common
JVM
JS
Native
1.3

kotlin.contracts

Experimental DSL for declaring custom function contracts.

Common
JVM
JS
Native
1.3

kotlin.coroutines

Basic primitives for creating and suspending coroutines: Continuation, CoroutineContext interfaces, coroutine creation and suspension top-level functions.

Common
JVM
JS
Native
1.1

kotlin.coroutines.experimental

Deprecated support for experimental coroutines, provided for compatibility. It's recommended to migrate to kotlin.coroutines API.

Common
JVM
JS
Native
1.1

kotlin.coroutines.experimental.intrinsics

Deprecated support for experimental coroutines, provided for compatibility. It's recommended to migrate to kotlin.coroutines.intrinsics API.

Common
JVM
JS
Native
1.3

kotlin.coroutines.intrinsics

Low-level building blocks for libraries that provide coroutine-based APIs.

JS
1.1

kotlin.dom

Utility functions for working with the browser DOM.

Common
JVM
JS
Native
1.1

kotlin.experimental

Experimental APIs, subject to change in future versions of Kotlin.

Common
JVM
JS
Native
1.0

kotlin.io

IO API for working with files and streams.

Common
JS
1.0

kotlin.js

Functions and other APIs specific to the JavaScript platform.

Common
JVM
JS
1.0

kotlin.jvm

Functions and annotations specific to the Java platform.

Common
JVM
JS
Native
1.2

kotlin.math

Mathematical functions and constants.

Native
1.3

kotlin.native

Native
1.3

kotlin.native.ref

Common
JVM
JS
Native
1.0

kotlin.properties

Standard implementations of delegates for delegated properties and helper functions for implementing custom delegates.

Common
JVM
JS
Native
1.3

kotlin.random

Provides the default generator of pseudo-random values, the repeatable generator, and a base class for other RNG implementations.

Common
JVM
JS
Native
1.0

kotlin.ranges

Ranges, Progressions and related top-level and extension functions.

Common
JVM
JS
Native
1.0

kotlin.reflect

Runtime API for Kotlin reflection

JVM
1.1

kotlin.reflect.full

Extensions for Kotlin reflection provided by kotlin-reflect library.

JVM
1.0

kotlin.reflect.jvm

Runtime API for interoperability between Kotlin reflection and Java reflection provided by kotlin-reflect library.

Common
JVM
JS
Native
1.0

kotlin.sequences

Sequence type that represents lazily evaluated collections. Top-level functions for instantiating sequences and extension functions for sequences.

JVM
JRE8
1.2

kotlin.streams

Utility functions for working with Java 8 streams.

JVM
Native
1.0

kotlin.system

System-related utility functions.

Common
JVM
JS
Native
1.0

kotlin.text

Functions for working with text and regular expressions.

Native
1.3

kotlinx.cinterop

JS
1.1

org.khronos.webgl

Kotlin JavaScript wrappers for the WebGL API.

JS
1.1

org.w3c.dom

Kotlin JavaScript wrappers for the DOM API.

JS
1.1

org.w3c.dom.css

Kotlin JavaScript wrappers for the DOM CSS API.

JS
1.1

org.w3c.dom.events

Kotlin JavaScript wrappers for the DOM events API.

JS
1.1

org.w3c.dom.parsing

Kotlin JavaScript wrappers for the DOM parsing API.

JS
1.1

org.w3c.dom.svg

Kotlin JavaScript wrappers for the DOM SVG API.

JS
1.1

org.w3c.dom.url

Kotlin JavaScript wrappers for the DOM URL API.

JS
1.1

org.w3c.fetch

Kotlin JavaScript wrappers for the W3C fetch API.

JS
1.1

org.w3c.files

Kotlin JavaScript wrappers for the W3C file API.

JS
1.1

org.w3c.notifications

Kotlin JavaScript wrappers for the Web Notifications API.

JS
1.1

org.w3c.performance

Kotlin JavaScript wrappers for the Navigation Timing API.

JS
1.1

org.w3c.workers

Kotlin JavaScript wrappers for the Web Workers API.

JS
1.1

org.w3c.xhr

Kotlin JavaScript wrappers for the XMLHttpRequest API.

Index

All Types