YakaAI
llrt Agent Skills & AI Rules
LLRT (Low Latency Runtime) is an experimental, lightweight JavaScript runtime designed to address the growing demand for fast and efficient Serverless...
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API Interface Contract & Specifications
API.md project-spec ~7,913 tokens# API documentation
> [!NOTE]
> The long term goal for LLRT is to become [WinterTC compliant](https://min-common-api.proposal.wintertc.org/). Not every API from Node.js will be supported.
# Node.js API
## assert
[ok](https://nodejs.org/api/assert.html#assertokvalue-message)
## async_hooks
### Static methods
[createHook](https://nodejs.org/api/async_hooks.html#async_hookscreatehookcallbacks)
[currentId](https://nodejs.org/api/async_hooks.html#async_hooksexecutionasyncid)
[executionAsyncId](https://nodejs.org/api/async_hooks.html#async_hooksexecutionasyncid)
[triggerAsyncId](https://nodejs.org/api/async_hooks.html#async_hookstriggerasyncid)
### Class: AsyncHook
[enable](https://nodejs.org/api/async_hooks.html#asynchookenable)
[disable](https://nodejs.org/api/async_hooks.html#asynchookdisable)
#### Hook callbacks
[init](https://nodejs.org/api/async_hooks.html#initasyncid-type-triggerasyncid-resource)
[before](https://nodejs.org/api/async_hooks.html#beforeasyncid)
[after](https://nodejs.org/api/async_hooks.html#afterasyncid)
[destroy](https://nodejs.org/api/async_hooks.html#destroyasyncid)
[promiseResolve](https://nodejs.org/api/async_hooks.html#promiseresolveasyncid)
## buffer
### Static methods
[alloc](https://nodejs.org/api/buffer.html#static-method-bufferallocsize-fill-encoding)
[allocUnsafe](https://nodejs.org/api/buffer.html#static-method-bufferallocunsafesize)
[allocUnsafeSlow](https://nodejs.org/api/buffer.html#static-method-bufferallocunsafeslowsize)
[byteLength](https://nodejs.org/api/buffer.html#static-method-bufferbytelengthstring-encoding)
[concat](https://nodejs.org/api/buffer.html#static-method-bufferconcatlist-totallength)
[from](https://nodejs.org/api/buffer.html#static-method-bufferfromarray)
[isBuffer](https://nodejs.org/api/buffer.html#static-method-bufferisbufferobj)
[isEncoding](https://nodejs.org/api/buffer.html#static-method-bufferisencodingencoding)
### Prototype methods
[copy](https://nodejs.org/api/buffer.html#bufcopytarget-targetstart-sourcestart-sourceend)
[readBigInt64BE](https://nodejs.org/api/buffer.html#bufreadbigint64beoffset)
[readBigInt64LE](https://nodejs.org/api/buffer.html#bufreadbigint64leoffset)
[readDoubleBE](https://nodejs.org/api/buffer.html#bufreaddoublebeoffset)
[readDoubleLE](https://nodejs.org/api/buffer.html#bufreaddoubleleoffset)
[readFloatBE](https://nodejs.org/api/buffer.html#bufreadfloatbeoffset)
[readFloatLE](https://nodejs.org/api/buffer.html#bufreadfloatleoffset)
[readInt8](https://nodejs.org/api/buffer.html#bufreadint8offset)
[readInt16BE](https://nodejs.org/api/buffer.html#bufreadint16beoffset)
[readInt16LE](https://nodejs.org/api/buffer.html#bufreadint16leoffset)
[readInt32BE](https://nodejs.org/api/buffer.html#bufreadint32beoffset)
[readInt32LE](https://nodejs.org/api/buffer.html#bufreadint32leoffset)
[readUInt8](https://nodejs.org/api/buffer.html#bufreaduint8offset)
[readUInt16BE](https://nodejs.org/api/buffer.html#bufreaduint16beoffset)
[readUInt16LE](https://nodejs.org/api/buffer.html#bufreaduint16leoffset)
[readUInt32BE](https://nodejs.org/api/buffer.html#bufreaduint32beoffset)
[readUInt32LE](https://nodejs.org/api/buffer.html#bufreaduint32leoffset)
[subarray](https://nodejs.org/api/buffer.html#bufsubarraystart-end)
[toString](https://nodejs.org/api/buffer.html#buftostringencoding-start-end)
[write](https://nodejs.org/api/buffer.html#bufwritestring-offset-length-encoding)
[writeBigInt64BE](https://nodejs.org/api/buffer.html#bufwritebigint64bevalue-offset)
[writeBigInt64LE](https://nodejs.org/api/buffer.html#bufwritebigint64levalue-offset)
[writeDoubleBE](https://nodejs.org/api/buffer.html#bufwritedoublebevalue-offset)
[writeDoubleLE](https://nodejs.org/api/buffer.html#bufwritedoublelevalue-offset)
[writeFloatBE](https://nodejs.org/api/buffer.html#bufwritefloatbevalue-offset)
[writeFloatLE](https://nodejs.org/api/buffer.html#bufwritefloatlevalue-offset)
[writeInt8](https://nodejs.org/api/buffer.html#bufwriteint8value-offset)
[writeInt16BE](https://nodejs.org/api/buffer.html#bufwriteint16bevalue-offset)
[writeInt16LE](https://nodejs.org/api/buffer.html#bufwriteint16levalue-offset)
[writeInt32BE](https://nodejs.org/api/buffer.html#bufwriteint32bevalue-offset)
[writeInt32LE](https://nodejs.org/api/buffer.html#bufwriteint32levalue-offset)
[writeUInt8](https://nodejs.org/api/buffer.html#bufwriteuint8value-offset)
[writeUInt16BE](https://nodejs.org/api/buffer.html#bufwriteuint16bevalue-offset)
[writeUInt16LE](https://nodejs.org/api/buffer.html#bufwriteuint16levalue-offset)
[writeUInt32BE](https://nodejs.org/api/buffer.html#bufwriteuint32bevalue-offset)
[writeUInt32LE](https://nodejs.org/api/buffer.html#bufwriteuint32levalue-offset)
### Constants
[constants.MAX_LENGTH](https://nodejs.org/api/buffer.html#bufferconstantsmax_length)
[constants.MAX_STRING_LENGTH](https://nodejs.org/api/buffer.html#bufferconstantsmax_string_length)
Everything else inherited from [Uint8Array](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Uint8Array)
## child_process
> [!WARNING]
> `spawn` uses native streams that is not 100% compatible with the Node.js Streams API.
[spawn](https://nodejs.org/api/child_process.html#child_processspawncommand-args-options)
[execFile](https://nodejs.org/api/child_process.html#child_processexecfilefile-args-options-callback)
## console
[Console](https://nodejs.org/api/console.html#class-console)
## crypto
[createHash](https://nodejs.org/api/crypto.html#cryptocreatehashalgorithm-options)
[createHmac](https://nodejs.org/api/crypto.html#cryptocreatehmacalgorithm-key-options)
[getRandomValues](https://nodejs.org/api/crypto.html#cryptogetrandomvaluestypedarray)
[randomBytes](https://nodejs.org/api/crypto.html#cryptorandombytessize-callback)
[randomFill](https://nodejs.org/api/crypto.html#cryptorandomfillbuffer-offset-size-callback)
[randomFillSync](https://nodejs.org/api/crypto.html#cryptorandomfillsyncbuffer-offset-size)
[randomInt](https://nodejs.org/api/crypto.html#cryptorandomintmin-max-callback)
[randomUUID](https://nodejs.org/api/crypto.html#cryptorandomuuidoptions)
[webcrypto](https://nodejs.org/api/crypto.html#cryptowebcrypto)
### LLRT specific hash classes
Lightweight and fast hash classes for LLRT.
- `Md5`
- `Sha1`
- `Sha256`
- `Sha384`
- `Sha512`
- `Crc32`
- `Crc32c`
## crypto.subtle
[subtle.decrypt](https://w3c.github.io/webcrypto/#SubtleCrypto-method-decrypt)
[subtle.decapsulateBits](https://wicg.github.io/webcrypto-modern-algos/#SubtleCrypto-method-decapsulateBits)
[subtle.decapsulateKey](https://wicg.github.io/webcrypto-modern-algos/#SubtleCrypto-method-decapsulateKey)
[subtle.deriveBits](https://w3c.github.io/webcrypto/#SubtleCrypto-method-deriveBits)
[subtle.deriveKey](https://w3c.github.io/webcrypto/#SubtleCrypto-method-deriveKey)
[subtle.digest](https://w3c.github.io/webcrypto/#SubtleCrypto-method-digest)
[subtle.encapsulateBits](https://wicg.github.io/webcrypto-modern-algos/#SubtleCrypto-method-encapsulateBits)
[subtle.encapsulateKey](https://wicg.github.io/webcrypto-modern-algos/#SubtleCrypto-method-encapsulateKey)
[subtle.encrypt](https://w3c.github.io/webcrypto/#SubtleCrypto-method-encrypt)
[subtle.exportKey](https://w3c.github.io/webcrypto/#SubtleCrypto-method-exportKey)
[subtle.generateKey](https://w3c.github.io/webcrypto/#SubtleCrypto-method-generateKey)
[subtle.getPublicKey](https://wicg.github.io/webcrypto-modern-algos/#SubtleCrypto-method-getPublicKey)
[subtle.importKey](https://w3c.github.io/webcrypto/#SubtleCrypto-method-importKey)
[subtle.sign](https://w3c.github.io/webcrypto/#SubtleCrypto-method-sign)
[subtle.unwrapKey](https://w3c.github.io/webcrypto/#SubtleCrypto-method-unwrapKey)
[subtle.verify](https://w3c.github.io/webcrypto/#SubtleCrypto-method-verify)
[subtle.wrapKey](https://w3c.github.io/webcrypto/#SubtleCrypto-method-wrapKey)
[SubtleCrypto.supports](https://wicg.github.io/webcrypto-modern-algos/#SubtleCrypto-method-supports)
## dgram
[createSocket](https://nodejs.org/api/dgram.html#dgramcreatesocketoptions-callback)
### Class: dgram.Socket
[address](https://nodejs.org/api/dgram.html#socketaddress)
[bind](https://nodejs.org/api/dgram.html#socketbindport-address-callback)
[close](https://nodejs.org/api/dgram.html#socketclosecallback)
[ref](https://nodejs.org/api/dgram.html#socketref)
[send](https://nodejs.org/api/dgram.html#socketsendmsg-offset-length-port-address-callback)
[unref](hhttps://nodejs.org/api/dgram.html#socketunref)
## dns
[lookup](https://nodejs.org/api/dns.html#dnslookuphostname-options-callback)
## events
[EventEmitter](https://nodejs.org/api/events.html#class-eventemitter)
## fs
[accessSync](https://nodejs.org/api/fs.html#fsaccesssyncpath-mode)
[constants](https://nodejs.org/api/fs.html#file-access-constants)
[lstatSync](https://nodejs.org/api/fs.html#fslstatsyncpath-options)
[mkdirSync](https://nodejs.org/api/fs.html#fsmkdirsyncpath-options)
[mkdtempSync](https://nodejs.org/api/fs.html#fsmkdtempsyncprefix-options)
[readdirSync](https://nodejs.org/api/fs.html#fsreaddirsyncpath-options)
[readFileSync](https://nodejs.org/api/fs.html#fsreadfilesyncpath-options)
[rmdirSync](https://nodejs.org/api/fs.html#fsrmdirsyncpath-options)
[rmSync](https://nodejs.org/api/fs.html#fsrmsyncpath-options)
[statSync](https://nodejs.org/api/fs.html#fsstatsyncpath-options)
[writeFileSync](https://nodejs.org/api/fs.html#fswritefilesyncfile-data-options)
[chmodSync](https://nodejs.org/api/fs.html#fschmodsyncpath-mode)
[renameSync](https://nodejs.org/api/fs.html#fsrenamesyncoldpath-newpath)
[symlinkSync](https://nodejs.org/api/fs.html#fssymlinksynctarget-path-type)
## fs/promises
[access](https://nodejs.org/api/fs.html#fsstatpath-options-callback)
[constants](https://nodejs.org/api/fs.html#file-access-constants)
[lstat](https://nodejs.org/api/fs.html#fspromiseslstatpath-options)
[mkdir](https://nodejs.org/api/fs.html#fsmkdirpath-options-callback)
[mkdtemp](https://nodejs.org/api/fs.html#fsmkdtempprefix-options-callback)
[open](https://nodejs.org/api/fs.html#fspromisesopenpath-flags-mode)
[readdir](https://nodejs.org/api/fs.html#fspromisesreaddirpath-options)
[readFile](https://nodejs.org/api/fs.html#filehandlereadfileoptions)
[rm](https://nodejs.org/api/fs.html#fsrmpath-options-callback)
[rmdir](https://nodejs.org/api/fs.html#fsrmdirpath-options-callback)
[stat](https://nodejs.org/api/fs.html#fsstatpath-options-callback)
[writeFile](https://nodejs.org/api/fs.html#fspromiseswritefilefile-data-options)
[chmod](https://nodejs.org/api/fs.html#fspromiseschmodpath-mode)
[rename](https://nodejs.org/api/fs.html#fspromisesrenameoldpath-newpath)
[symlink](https://nodejs.org/api/fs.html#fspromisessymlinktarget-path-type)
## https
[Agent](https://nodejs.org/api/https.html#class-httpsagent)
## module
[builtinModules](https://nodejs.org/api/module.html#modulebuiltinmodules)
[createRequire](https://nodejs.org/api/module.html#modulecreaterequirefilename)
> [!NOTE]
> `require` is available from esm modules natively. This function is just for compatibility
[isBuiltin](https://nodejs.org/api/module.html#moduleisbuiltinmodulename)
[registerHooks](https://nodejs.org/api/module.html#moduleregisterhooksoptions)
## net
> [!WARNING]
> These APIs uses native streams that is not 100% compatible with the Node.js Streams API. Server APIs like `createSever` provides limited functionality useful for testing purposes. Serverless applications typically don't expose servers. Some server options are not supported:
> `highWaterMark`, `pauseOnConnect`, `keepAlive`, `noDelay`, `keepAliveInitialDelay`
[connect](https://nodejs.org/api/net.html#netconnect)
[createConnection](https://nodejs.org/api/net.html#netcreateconnection)
[createServer](https://nodejs.org/api/net.html#netcreateserveroptions-connectionlistener)
## os
[arch](https://nodejs.org/api/os.html#osarch)
[availableParallelism](https://nodejs.org/api/os.html#osavailableparallelism)
[cpus](https://nodejs.org/api/os.html#oscpus)
[devNull](https://nodejs.org/api/os.html#osdevnull)
[endianness](https://nodejs.org/api/os.html#osendianness)
[EOL](https://nodejs.org/api/os.html#oseol)
[freemem](https://nodejs.org/api/os.html#osfreemem)
[getPriority](https://nodejs.org/api/os.html#osgetprioritypid)
[homedir](https://nodejs.org/api/os.html#oshomedir)
[hostname](https://nodejs.org/api/os.html#oshostname)
[loadavg](https://nodejs.org/api/os.html#osloadavg)
[machine](https://nodejs.org/api/os.html#osmachine)
[networkInterfaces](https://nodejs.org/api/os.html#osnetworkinterfaces)
[platform](https://nodejs.org/api/os.html#osplatform)
[release](https://nodejs.org/api/os.html#osrelease)
[setPriority](https://nodejs.org/api/os.html#ossetprioritypid-priority)
[tmpdir](https://nodejs.org/api/os.html#osplatform)
[totalmem](https://nodejs.org/api/os.html#ostotalmem)
[type](https://nodejs.org/api/os.html#ostype)
[uptime](https://nodejs.org/api/os.html#osuptime)
[userInfo](https://nodejs.org/api/os.html#osuserinfooptions)
[version](https://nodejs.org/api/os.html#osversion)
## path
[basename](https://nodejs.org/api/path.html#pathbasenamepath-suffix)
[delimiter](https://nodejs.org/api/path.html#pathdelimiter)
[dirname](https://nodejs.org/api/path.html#pathdirnamepath)
[extname](https://nodejs.org/api/path.html#pathextnamepath)
[format](https://nodejs.org/api/path.html#pathformatpathobject)
[isAbsolute](https://nodejs.org/api/path.html#pathisabsolutepath)
[join](https://nodejs.org/api/path.html#pathjoinpaths)
[normalize](https://nodejs.org/api/path.html#pathnormalizepath)
[parse](https://nodejs.org/api/path.html#pathparsepath)
[relative](https://nodejs.org/api/path.html#pathrelativefrom-to)
[resolve](https://nodejs.org/api/path.html#pathresolvepaths)
## perf_hooks
_performance is available globally_
[performance.now](https://nodejs.org/api/perf_hooks.html#performancenow)
## process
_process is available globally_
[arch](https://nodejs.org/api/process.html#processarch)
[argv](https://nodejs.org/api/process.html#processargv)
[argv0](https://nodejs.org/api/process.html#processargv0)
[cwd](https://nodejs.org/api/process.html#processcwd)
[env](https://nodejs.org/api/process.html#processenv)
[exit](https://nodejs.org/api/process.html#processexitcode)
[exitCode](https://nodejs.org/api/process.html#processexitcode-1)
[getegid](https://nodejs.org/api/process.html#processgetegid)
[geteuid](https://nodejs.org/api/process.html#processgeteuid)
[getgid](https://nodejs.org/api/process.html#processgetgid)
[getuid](https://nodejs.org/api/process.html#processgetuid)
[hrtime](https://nodejs.org/api/process.html#processhrtime)
[id](https://nodejs.org/api/process.html#processpid)
[kill](https://nodejs.org/api/process.html#processkillpid-signal)
[platform](https://nodejs.org/api/process.html#processplatform)
[release](https://nodejs.org/api/process.html#processrelease)
[setegid](https://nodejs.org/api/process.html#processsetegidgid)
[seteuid](https://nodejs.org/api/process.html#processseteuiduid)
[setgid](https://nodejs.org/api/process.html#processsetgidgid)
[setuid](https://nodejs.org/api/process.html#processsetuiduid)
[version](https://nodejs.org/api/process.html#processversion)
[versions](https://nodejs.org/api/process.html#processversions)
## stream
[Duplex](https://nodejs.org/api/stream.html#class-streamduplex)
[PassThrough](https://nodejs.org/api/stream.html#class-streampassthrough)
[Readable](https://nodejs.org/api/stream.html#class-streamreadable)
[Stream](https://nodejs.org/api/stream.html#class-stream)
[Transform](https://nodejs.org/api/stream.html#class-streamtransform)
[Writable](https://nodejs.org/api/stream.html#class-streamwritable)
[finished](https://nodejs.org/api/stream.html#streamfinishedstream-options-callback)
[pipeline](https://nodejs.org/api/stream.html#streampipelinestreams-callback)
## stream/promises
[finished](https://nodejs.org/api/stream.html#streamfinishedstream-options-callback)
[pipeline](https://nodejs.org/api/stream.html#streampipelinestreams-callback)
## string_decoder
[StringDecoder](https://nodejs.org/api/string_decoder.html#class-stringdecoder)
## timers
_Also available globally_
[clearImmediate](https://nodejs.org/api/timers.html#clearimmediateimmediate)
[clearInterval](https://nodejs.org/api/timers.html#clearintervaltimeout)
[clearTimeout](https://nodejs.org/api/timers.html#cleartimeouttimeout)
[setImmediate](https://nodejs.org/api/timers.html#setimmediatecallback-args)
[setInterval](https://nodejs.org/api/timers.html#setintervalcallback-delay-args)
[setTimeout](https://nodejs.org/api/timers.html#settimeoutcallback-delay-args)
## tty
[isatty](https://nodejs.org/api/tty.html#ttyisattyfd)
## url
### Class
[URL](https://nodejs.org/api/url.html#class-url)
[URLSearchParams](https://nodejs.org/api/url.html#class-urlsearchparams)
### Prototype methods
[domainToASCII](https://nodejs.org/api/url.html#urldomaintoasciidomain)
[domainToUnicode](https://nodejs.org/api/url.html#urldomaintounicodedomain)
[fileURLToPath](https://nodejs.org/api/url.html#urlfileurltopathurl-options)
[format](https://nodejs.org/api/url.html#urlformaturl-options)
[pathToFileURL](https://nodejs.org/api/url.html#urlpathtofileurlpath-options)
[urlToHttpOptions](https://nodejs.org/api/url.html#urlurltohttpoptionsurl)
## util
> [!IMPORTANT]
> Supported encodings: hex, base64, utf-8, utf-16le, windows-1252 and their aliases.
[format](https://nodejs.org/api/util.html#utilformatformat-args)
[inherits](https://nodejs.org/api/util.html#utilinheritsconstructor-superconstructor)
[styleText](https://nodejs.org/api/util.html#utilstyletextformat-text)
[inspect](https://nodejs.org/api/util.html#utilinspectobject-options)
[TextDecoder](https://nodejs.org/api/util.html#class-utiltextdecoder)
[TextDecoderStream](https://nodejs.org/api/webstreams.html#class-textdecoderstream)
[TextEncoder](https://nodejs.org/api/util.html#class-utiltextdecoder)
[TextEncoderStream](https://nodejs.org/api/webstreams.html#class-textencoderstream)
## zlib
### Convenience methods
[deflate](https://nodejs.org/api/zlib.html#zlibdeflatebuffer-options-callback)
[deflateSync](https://nodejs.org/api/zlib.html#zlibdeflatesyncbuffer-options)
[deflateRaw](https://nodejs.org/api/zlib.html#zlibdeflaterawbuffer-options-callback)
[deflateRawSync](https://nodejs.org/api/zlib.html#zlibdeflaterawsyncbuffer-options)
[gzip](https://nodejs.org/api/zlib.html#zlibgzipbuffer-options-callback)
[gzipSync](https://nodejs.org/api/zlib.html#zlibgzipsyncbuffer-options)
[inflate](https://nodejs.org/api/zlib.html#zlibinflatebuffer-options-callback)
[inflateSync](https://nodejs.org/api/zlib.html#zlibinflatesyncbuffer-options)
[inflateRaw](https://nodejs.org/api/zlib.html#zlibinflaterawbuffer-options-callback)
[inflateRawSync](https://nodejs.org/api/zlib.html#zlibinflaterawsyncbuffer-options)
[gunzip](https://nodejs.org/api/zlib.html#zlibgunzipbuffer-options-callback)
[gunzipSync](https://nodejs.org/api/zlib.html#zlibgunzipsyncbuffer-options)
[brotliCompress](https://nodejs.org/api/zlib.html#zlibbrotlicompressbuffer-options-callback)
[brotliCompressSync](https://nodejs.org/api/zlib.html#zlibbrotlicompresssyncbuffer-options)
[brotliDecompress](https://nodejs.org/api/zlib.html#zlibbrotlidecompressbuffer-options-callback)
[brotliDecompressSync](https://nodejs.org/api/zlib.html#zlibbrotlidecompresssyncbuffer-options)
[zstdCompress](https://nodejs.org/api/zlib.html#zlibzstdcompressbuffer-options-callback)
[zstdCompressSync](https://nodejs.org/api/zlib.html#zlibzstdcompresssyncbuffer-options)
[zstdDecompress](https://nodejs.org/api/zlib.html#zlibzstddecompressbuffer-options-callback)
[zstdDecompressSync](https://nodejs.org/api/zlib.html#zlibzstddecompresssyncbuffer-options)
# LLRT API
## llrt:codec
```typescript
export function decodeFromBase64(value: string): Uint8Array;
export function encodeToBase64(
value: string | Array | ArrayBuffer | Uint8Array
): string;
export function decodeFromHex(value: string): Uint8Array;
export function encodeToHex(
value: string | Array | ArrayBuffer | Uint8Array
): string;
```
## llrt:timezone
Lightweight timezone support for LLRT. Provides timezone offset calculations and a minimal `Intl.DateTimeFormat` implementation for dayjs and similar library compatibility.
```typescript
interface Timezone {
/**
* Get the UTC offset in minutes for a timezone at a given time.
* Returns a positive value for timezones ahead of UTC (e.g., 540 for Asia/Tokyo)
* and a negative value for timezones behind UTC (e.g., -420 for America/Denver).
* Automatically handles DST transitions.
*/
getOffset(timezone: string, epochMs: number): number;
/**
* List all available IANA timezone names.
*/
list(): string[];
}
declare var Timezone: Timezone;
export { Timezone };
```
### Example
```javascript
import { Timezone } from "llrt:timezone";
// Get current offset for Denver (handles DST automatically)
const offset = Timezone.getOffset("America/Denver", Date.now());
// Returns -420 (UTC-7) in winter, -360 (UTC-6) in summer
// Check DST transition
const beforeDst = new Date("2024-03-09T12:00:00Z").getTime();
const afterDst = new Date("2024-03-11T12:00:00Z").getTime();
console.log(Timezone.getOffset("America/Denver", beforeDst)); // -420
console.log(Timezone.getOffset("America/Denver", afterDst)); // -360
// List all available timezones
const zones = Timezone.list();
```
### Intl.DateTimeFormat
LLRT provides a minimal `Intl.DateTimeFormat` implementation focused on timezone support. This enables libraries like dayjs to work with timezone conversions transparently.
```javascript
// Create a formatter for a specific timezone
const formatter = new Intl.DateTimeFormat("en-US", {
timeZone: "America/Denver",
hour12: false,
year: "numeric",
month: "2-digit",
day: "2-digit",
hour: "2-digit",
minute: "2-digit",
second: "2-digit",
});
// Format a date
const date = new Date("2022-03-02T15:45:34Z");
console.log(formatter.format(date)); // "03/02/2022, 08:45:34"
// Get formatted parts
const parts = formatter.formatToParts(date);
// [{ type: "month", value: "03" }, { type: "literal", value: "/" }, ...]
// Get resolved options
const options = formatter.resolvedOptions();
console.log(options.timeZone); // "America/Denver"
```
### Date.prototype.toLocaleString with timezone
`Date.prototype.toLocaleString` is enhanced to support the `timeZone` option:
```javascript
const date = new Date("2022-03-02T15:45:34Z");
// Convert to Denver time
console.log(date.toLocaleString("en-US", { timeZone: "America/Denver" }));
// "03/02/2022, 8:45:34 AM"
// Convert to Tokyo time
console.log(date.toLocaleString("en-US", { timeZone: "Asia/Tokyo" }));
// "03/03/2022, 12:45:34 AM"
```
### Using with dayjs
The timezone module enables dayjs timezone support without polyfills:
```javascript
const dayjs = require("dayjs");
const utc = require("dayjs/plugin/utc");
const timezone = require("dayjs/plugin/timezone");
dayjs.extend(utc);
dayjs.extend(timezone);
// Convert between timezones
const date = dayjs("2022-03-02T15:45:34Z");
console.log(date.tz("America/Denver").format()); // "2022-03-02T08:45:34-07:00"
console.log(date.tz("Asia/Tokyo").format()); // "2022-03-03T00:45:34+09:00"
// Get start of day in a specific timezone
const denver = date.tz("America/Denver");
console.log(denver.startOf("day").format()); // "2022-03-02T00:00:00-07:00"
```
## llrt:qjs
```typescript
interface MemoryInfo {
malloc_size: number;
malloc_limit: number;
memory_used_size: number;
malloc_count: number;
memory_used_count: number;
atom_count: number;
atom_size: number;
str_count: number;
str_size: number;
obj_count: number;
obj_size: number;
prop_count: number;
prop_size: number;
shape_count: number;
shape_size: number;
js_func_count: number;
js_func_size: number;
js_func_code_size: number;
js_func_pc2line_count: number;
js_func_pc2line_size: number;
c_func_count: number;
array_count: number;
fast_array_count: number;
fast_array_elements: number;
binary_object_count: number;
binary_object_size: number;
}
export function ComputeMemoryUsage(): MemoryInfo;
```
## llrt:xml
A lightweight and fast XML parser and builder
```typescript
export class XmlText {
constructor(text: string);
toString(): string;
}
export class XmlNode {
constructor(name: string);
withName(name: string): this;
addAttribute(name: string, value: string): this;
addChildNode(node: XmlNode | XmlText): this;
removeAttribute(name: string): this;
toString(): string;
}
type XmlParserOptions = {
ignoreAttributes?: boolean;
attributeNamePrefix?: string;
textNodeName?: string;
attributeValueProcessor?: (attrName: string, attrValue: string, jpath: string) => unknown;
tagValueProcessor?: (attrName: string, attrValue: string, jpath: string, hasAttributes: boolean) => unknown;
}
export class XMLParser(options?: XmlParserOptions){
parse(xml:string):object
}
```
## llrt:util
```typescript
export function dimensions(): [number, number];
export function load(path: string): any;
export function print(value: any): void;
```
# Web Platform API
## CONSOLE
[Console](https://developer.mozilla.org/en-US/docs/Web/API/console)
## DOM
[AbortController](https://developer.mozilla.org/en-US/docs/Web/API/AbortController)
[AbortSignal](https://developer.mozilla.org/en-US/docs/Web/API/AbortSignal)
[CustomEvent](https://developer.mozilla.org/en-US/docs/Web/API/CustomEvent)
[Event](https://developer.mozilla.org/en-US/docs/Web/API/Event)
[EventTarget](https://developer.mozilla.org/en-US/docs/Web/API/EventTarget)
## ECMASCRIPT
[globalThis](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/globalThis)
## ENCODING
[TextDecoder](https://developer.mozilla.org/en-US/docs/Web/API/TextDecoder)
[TextEncoder](https://developer.mozilla.org/en-US/docs/Web/API/TextEncoder)
## FETCH
[Headers](https://developer.mozilla.org/en-US/docs/Web/API/Headers)
[Request](https://developer.mozilla.org/en-US/docs/Web/API/Request)
[Response](https://developer.mozilla.org/en-US/docs/Web/API/Response)
[fetch](https://developer.mozilla.org/en-US/docs/Web/API/Headers)
> [!IMPORTANT]
> There are some differences with the [WHATWG standard](https://fetch.spec.whatwg.org). Mainly browser specific behavior is removed:
>
> - `keepalive` is always true
> - `request.body` can only be `string`, `Array`, `ArrayBuffer` or `Uint8Array`
> - `response.body` returns `null`. Use `response.text()`, `response.json()` etc
> - `mode`, `credentials`, `referrerPolicy`, `priority`, `cache` is not available/applicable
## FILEAPI
[Blob](https://developer.mozilla.org/en-US/docs/Web/API/Blob)
[File](https://developer.mozilla.org/en-US/docs/Web/API/File)
## HR-TIME
[performance.now](https://developer.mozilla.org/en-US/docs/Web/API/Performance/now)
[performance.timeOrigin](https://developer.mozilla.org/en-US/docs/Web/API/Performance/timeOrigin)
## HTML
[atob](https://developer.mozilla.org/en-US/docs/Web/API/atob)
[btoa](https://developer.mozilla.org/en-US/docs/Web/API/btoa)
[clearInterval](https://developer.mozilla.org/en-US/docs/Web/API/Window/clearInterval)
[clearTimeout](https://developer.mozilla.org/en-US/docs/Web/API/Window/clearTimeout)
[navigator](https://developer.mozilla.org/en-US/docs/Web/API/Window/navigator)
[queueMicrotask](https://developer.mozilla.org/en-US/docs/Web/API/Window/queueMicrotask)
[setInterval](https://developer.mozilla.org/en-US/docs/Web/API/Window/setInterval)
[setTimeout](https://developer.mozilla.org/en-US/docs/Web/API/Window/setTimeout)
[structuredClone](https://developer.mozilla.org/en-US/docs/Web/API/Window/structuredClone)
[userAgent](https://developer.mozilla.org/en-US/docs/Web/API/Navigator/userAgent)
## STREAMS
[ByteLengthQueuingStrategy](https://developer.mozilla.org/en-US/docs/Web/API/ByteLengthQueuingStrategy)
[CountQueuingStrategy](https://developer.mozilla.org/en-US/docs/Web/API/CountQueuingStrategy)
[ReadableByteStreamController](https://developer.mozilla.org/en-US/docs/Web/API/ReadableByteStreamController)
[ReadableStream](https://developer.mozilla.org/en-US/docs/Web/API/ReadableStream)
[ReadableStreamBYOBReader](https://developer.mozilla.org/en-US/docs/Web/API/ReadableStreamBYOBReader)
[ReadableStreamBYOBRequest](https://developer.mozilla.org/en-US/docs/Web/API/ReadableStreamBYOBRequest)
[ReadableStreamDefaultController](https://developer.mozilla.org/en-US/docs/Web/API/ReadableStreamDefaultController)
[ReadableStreamDefaultReader](https://developer.mozilla.org/en-US/docs/Web/API/ReadableStreamDefaultReader)
[TransformStream](https://developer.mozilla.org/en-US/docs/Web/API/TransformStream)
[TransformStreamDefaultController](https://developer.mozilla.org/en-US/docs/Web/API/TransformStreamDefaultController)
[WritableStream](https://developer.mozilla.org/en-US/docs/Web/API/WritableStream)
[WritableStreamDefaultController](https://developer.mozilla.org/en-US/docs/Web/API/WritableStreamDefaultController)
[WritableStreamDefaultWriter](https://developer.mozilla.org/en-US/docs/Web/API/WritableStreamDefaultWriter)
## URL
[URL](https://developer.mozilla.org/en-US/docs/Web/API/URL)
[URLSearchParams](https://developer.mozilla.org/en-US/docs/Web/API/URLSearchParams)
## WEBCRYPTO
[Crypto](https://developer.mozilla.org/en-US/docs/Web/API/Crypto)
[CryptoKey](https://developer.mozilla.org/en-US/docs/Web/API/CryptoKey)
[SubtleCrypto](https://developer.mozilla.org/en-US/docs/Web/API/SubtleCrypto)
## WEBIDL
[DOMException](https://developer.mozilla.org/en-US/docs/Web/API/DOMException)
## XHR
[FormData](https://developer.mozilla.org/en-US/docs/Web/API/FormData)