Supported JS APIs

APIs

Console

If the logging feature flag is enabled in the generated crate, it depends on wasi:logging, otherwise just on the core WASI interfaces.

• assert
• clear
• count
• countReset
• debug
• dir
• dirXml
• error
• group
• groupCollapsed
• groupEnd
• info
• log
• table
• time
• timeEnd
• timeLog
• trace
• warn

HTTP (fetch)

Only if the http feature flag is enabled in the generated crate. It depends on wasi:http.

• fetch
• Headers
• Request
• Response
• FormData
• Blob
• File

URL

• URL
• URLSearchParams

Streams

Implemented by https://github.com/MattiasBuelens/web-streams-polyfill (opens in a new tab)

• ByteLengthQueuingStrategy
• CountQueuingStrategy
• ReadableByteStreamController
• ReadableStream
• ReadableStreamBYOBReader
• ReadableStreamBYOBRequest
• ReadableStreamDefaultController
• ReadableStreamDefaultReader
• TransformStream
• TransformStreamDefaultController
• WritableStream
• WritableStreamDefaultController

Timeout functions

• setTimeout
• clearTimeout
• setInterval
• clearInterval
• setImmediate

Encoding

• TextEncoder
• TextDecoder
• TextDecoderStream
• TextEncoderStream

node:util

• format
• deprecate
• debugLog
• inspect
• isArray
• isBoolean
• isNull
• isNullOrUndefined
• isNumber
• isString
• isSymbol
• isUndefined
• isRegExp
• isObject
• isDate
• isError
• isFunction
• isPrimitive
• isBuffer
• log
• _extend
• promisify
• callbackify

node:buffer

• Buffer
• INSPECT_MAX_BYTES
• kMaxLength
• kStringMaxLength
• constants
• SlowBuffer

node:fs

• readFile
• readFileSync
• writeFile
• writeFileSync

node:process

• argv
• argv0
• env
• cwd

base64-js

• byteLength
• toByteArray
• fromByteArray

ieee754

• read
• write

Provided by QuickJS

• Global:

  • parseInt
  • parseFloat
  • isNaN
  • isFinite
  • quickMicrotask
  • decodeURI
  • decodeURIComponent
  • encodeURI
  • encodeURIComponent
  • escape
  • unescape
  • Infinity
  • NaN
  • undefined
  • [Symbol.toStringTag]

• Object

  • static methods and properties:
    • create
    • getPrototypeOf
    • setPrototypeOf
    • defineProperty
    • defineProperties
    • getOwnPropertyNames
    • getOwnPropertySymbols
    • groupBy
    • keys
    • values
    • entries
    • isExtensible
    • preventExtensions
    • getOwnPropertyDescriptor
    • getOwnPropertyDescriptors
    • is
    • assign
    • seal
    • freeze
    • isSealed
    • isFrozen
    • fromEntries
    • hasOwn
  • methods and properties:
    • toString
    • toLocaleString
    • valueOf
    • hasOwnProperty
    • isPrototypeOf
    • propertyIsEnumerable
    • __proto__
    • __defineGetter__
    • __defineSetter__
    • __lookupGetter__
    • __lookupSetter__

• Function

  • methods and properties:
    • call
    • apply
    • bind
    • toString
    • [Symbol.hasInstance]
    • fileName
    • lineNumber
    • columnNumber

• Error

  • methods and properties:
    • name
    • message
    • toString
  • static methods and properties:
    • isError
    • captureStackTrace
    • stackTraceLimit
    • prepareStackTrace

• Generator

  • methods and properties:
    • next
    • return
    • throw
    • [Symbol.toStringTag]
  • static methods and properties:
    • from

• Iterator

  • static methods and properties:
    • from
  • methods and properties:
    • drop filter flatMap map take every find forEach some reduce toArray [Symbol.iterator] [Symbol.toStringTag]

• Array

  • static methods and properties:
    • isArray
    • from
    • of
    • [Symbol.species]
  • methods and properties:
    • at
    • with
    • concat
    • every
    • some
    • forEach
    • map
    • filter
    • reduce
    • reduceRight
    • fill
    • find
    • findIndex
    • findLast
    • findLastIndex
    • indexOf
    • lastIndexOf
    • includes
    • join
    • toString
    • toLocaleString
    • pop
    • push
    • shift
    • unshift
    • reverse
    • toReversed
    • sort
    • toSorted
    • slice
    • splice
    • toSpliced
    • copyWithin
    • flatMap
    • flat
    • values
    • [Symbol.iterator]
    • keys
    • entries

• Number

  • static methods and properties:
    • parseInt
    • parseFloat
    • isNaN
    • isFinite
    • isInteger
    • isSafeInteger
    • MAX_VALUE
    • MIN_VALUE
    • NaN
    • NEGATIVE_INFINITY
    • POSITIVE_INFINITY
    • EPSILON
    • MAX_SAFE_INTEGER
    • MIN_SAFE_INTEGER
  • methods and properties:
    • toExponential
    • toFixed
    • toPrecision
    • toString
    • toLocaleString
    • valueOf

• Boolean

  • methods and properties:
    • toString
    • valueOf

• String

  • static methods and properties:
    • fromCharCode
    • fromCodePoint
    • raw
  • methods and properties:
    • length
    • at
    • charCodeAt
    • charAt
    • concat
    • codePointAt
    • isWellFormed
    • toWellFormed
    • indexOf
    • lastIndexOf
    • includes
    • endsWith
    • startsWith
    • match
    • matchAll
    • search
    • split
    • substring
    • substr
    • slice
    • repeat
    • replace
    • replaceAll
    • padEnd
    • padStart
    • trim
    • trimEnd
    • trimRight
    • trimStart
    • trimLeft
    • toString
    • valueOf
    • localeCompare
    • normalize
    • toLowerCase
    • toUpperCase
    • toLocaleLowerCase
    • toLocaleUpperCase
    • [Symbol.iterator]
    • anchor
    • big
    • blink
    • bold
    • fixed
    • fontcolor
    • fontsize
    • italics
    • link
    • small
    • strike
    • sub
    • sup

• Symbol

  • static methods and properties:
    • for
    • keyFor
  • methods and properties:
    • toString
    • valueOf
    • description
    • [Symbol.toPrimitive]
    • [Symbol.toStringTag]

• Map

  • static methods and properties:
    • groupBy
    • [Symbol.species]
  • methods and properties:
    • set
    • get
    • has
    • delete
    • clear
    • size
    • forEach
    • values
    • keys
    • entries
    • [Symbol.iterator]
    • [Symbol.toStringTag]

• Set

  • static methods and properties:
    • [Symbol.species]
  • methods and properties:
    • add
    • has
    • delete
    • clear
    • size
    • forEach
    • isDisjointFrom
    • isSubsetOf
    • isSupersetOf
    • intersection
    • difference
    • symmetricDifference
    • union
    • values
    • keys
    • [Symbol.iterator]
    • entries
    • [Symbol.toStringTag]

• WeakMap

  • methods and properties:
    • set
    • get
    • has
    • delete
    • [Symbol.toStringTag]

• WeakSet

  • methods and properties:
    • add
    • has
    • delete
    • [Symbol.toStringTag]

• GeneratorFunction

  • methods and properties:
    • [Symbol.toStringTag]

• Math

  • static methods and properties:
    • min
    • max
    • abs
    • floor
    • ceil
    • round
    • sqrt
    • acos
    • asin
    • atan
    • atan2
    • cos
    • exp
    • log
    • pow
    • sin
    • tan
    • trunc
    • sign
    • cosh
    • sinh
    • tanh
    • acosh
    • asinh
    • atanh
    • expm1
    • log1p
    • log2
    • log10
    • cbrt
    • hypot
    • random
    • f16round
    • fround
    • imul
    • clz32
    • sumPrecise
    • [Symbol.toStringTag]
    • E
    • LN10
    • LN2
    • LOG2E
    • LOG10E
    • PI
    • SQRT1_2
    • SQRT2

• Reflect

  • static methods and properties:
    • apply
    • construct
    • defineProperty
    • deleteProperty
    • get
    • getOwnPropertyDescriptor
    • getPrototypeOf
    • has
    • isExtensible
    • ownKeys
    • preventExtensions
    • set
    • setPrototypeOf
    • [Symbol.toStringTag]

• RegExp

  • static methods and properties:
    • escape
    • [Symbol.species]
  • methods and properties:
    • flags
    • source
    • global
    • ignoreCase
    • multiline
    • dotAll
    • unicode
    • unicodeSets
    • sticky
    • hasIndices
    • exec
    • compile
    • test
    • toString
    • [Symbol.replace]
    • [Symbol.match]
    • [Symbol.matchAll]
    • [Symbol.search]
    • [Symbol.split]

• JSON

  • static methods and properties:
    • parse
    • stringify
    • [Symbol.toStringTag]

• Promise

  • static methods and properties:
    • resolve
    • reject
    • all
    • allSettled
    • any
    • try
    • race
    • withResolvers
    • [Symbol.species]
  • methods and properties:
    • then
    • catch
    • finally
    • [Symbol.toStringTag]

• AsyncFunction

  • methods and properties:
    • [Symbol.toStringTag]

• AsyncIterator

  • methods and properties:
    • next
    • return
    • throw

• AsyncGeneratorFunction

  • methods and properties:
    • [Symbol.toStringTag]

• AsyncGenerator

  • methods and properties:
    • next
    • return
    • throw
    • [Symbol.toStringTag]

• Date

  • static methods and properties:
    • now
    • parse
    • UTC
  • methods and properties:
    • valueOf
    • toString
    • [Symbol.toPrimitive]
    • toUTCString
    • toGMTString
    • toISOString
    • toDateString
    • toTimeString
    • toLocaleString
    • toLocaleDateString
    • toLocaleTimeString
    • getTimezoneOffset
    • getTime
    • getYear
    • getFullYear
    • getUTCFullYear
    • getMonth
    • getUTCMonth
    • getDate
    • getUTCDate
    • getHours
    • getUTCHours
    • getMinutes
    • getUTCMinutes
    • getSeconds
    • getUTCSeconds
    • getMilliseconds
    • getUTCMilliseconds
    • getDay
    • getUTCDay
    • setTime
    • setMilliseconds
    • setUTCMilliseconds
    • setSeconds
    • setUTCSeconds
    • setMinutes
    • setUTCMinutes
    • setHours
    • setUTCHours
    • setDate
    • setUTCDate
    • setMonth
    • setUTCMonth
    • setYear
    • setFullYear
    • setUTCFullYear
    • toJSON

• BigInt

  • static methods and properties:
    • asIntN
    • asUintN
  • methods and properties:
    • toString
    • valueOf
    • [Symbol.toStringTag]

• ArrayBuffer

  • static methods and properties:
    • isView
    • [Symbol.species
  • methods and properties:
    • byteLength
    • maxByteLength
    • resizeable
    • detached
    • resize
    • slice
    • transfer
    • transferToFixedLength
    • [Symbol.toStringTag]

• SharedArrayBuffer

  • static methods and properties:
    • [Symbol.species]
  • methods and properties:
    • byteLength
    • maxByteLength
    • growable
    • grow
    • slice
    • [Symbol.toStringTag]

• Typed arrays (Int8Array, Uint8Array, Int16Array, Uint16Array, Int32Array, Uint32Array, BigInt64Array, BigUint64Array, Float32Array, Float64Array, Float16Array)

  • static methods and properties:
    • from
    • of
    • [Symbol.species]
  • methods and properties:
    • length
    • at
    • with
    • buffer
    • byteLength
    • set
    • byteOffset
    • values
    • [Symbol.iterator]
    • keys
    • entries
    • [Symbol.toStringTag]
    • copyWithin
    • every
    • some
    • forEach
    • map
    • filter
    • reduce
    • reduceRight
    • fill
    • find
    • findIndex
    • findLast
    • findLastIndex
    • reverse
    • toReversed
    • slice
    • subarray
    • sort
    • toSorted
    • join
    • toLocaleString
    • indexOf
    • lastIndexOf
    • includes

• DataView

  • methods and properties:
    • buffer
    • byteLength
    • byteOffset
    • getInt8
    • getUint8
    • getInt16
    • getUint16
    • getInt32
    • getUint32
    • getBigInt64
    • getBigUint64
    • getFloat16
    • getFloat32
    • getFloat64
    • setInt8
    • setUint8
    • setInt16
    • setUint16
    • setInt32
    • setUint32
    • setBigInt64
    • setBigUint64
    • setFloat16
    • setFloat32
    • setFloat64
    • [Symbol.toStringTag]

• Atomics

  • static methods and properties:
    • add
    • and
    • or
    • sub
    • xor
    • exchange
    • compareExchange
    • load
    • store
    • isLockFree
    • pause
    • wait
    • notify
    • [Symbol.toStringTag]

• Performance

  • methods and properties:
    • now

• WeakRef

  • methods and properties:
    • deref
    • [Symbol.toStringTag]

• FinalizationRegistry

  • methods and properties:
    • register
    • unregister
    • [Symbol.toStringTag]

• Callsite

  • methods and properties: -isNative
    • getFileName
    • getFunction
    • getFunctionName
    • getColumnNumber
    • getLineNumber
    • [Symbol.toStringTag]

• Proxy