Fast.Utils export inventory

Each module links to method signatures, runnable examples, parameter types/descriptions, and return contracts. Object and returned-function methods are documented within their owning module.

Modules	Method reference
Array	Reference
Async	Reference
Base64	Reference
Color	Reference
Crypto	Reference
Date	Reference
DOM	Reference
Environment	Reference
Function	Reference
Identity	Reference
Logger	Reference
Number	Reference
Object	Reference
Storage	Reference
String	Reference
Vue	Reference

This inventory follows the @fast-china/utils 2.1.8 root exports. Import every member by name from the root; no public module subpaths exist. Use import type for types. See the API guide and runtime contract for storage, cryptography, error, and platform constraints.

import { chunk, sleep, encodeBase64, parseHexColor, addDays, addCssUnit, isBrowser, once, clamp, pick, Local, camelCase } from "@fast-china/utils";

const pages = chunk([1, 2, 3, 4], 2);
await sleep(20);
const encoded = encodeBase64("Fast");
const color = parseHexColor("#409eff");
const tomorrow = addDays(new Date(), 1);
const size = addCssUnit(24);
const browser = isBrowser();
const initialize = once(() => ({ ready: true }));
const progress = clamp(120, 0, 100);
const selected = pick({ id: 1, name: "Fast" }, ["id"] as const);
Local.set("profile", selected);
const className = camelCase("fast-element-plus");

Array

• Types: KeySelector.
• Functions: chunk, removeNullishValues, unique, uniqueBy, groupBy, partition, difference, intersection, symmetricDifference, hasDuplicatesBy, allEqualBy.

Async

• Types: AbortOptions, TimeoutOptions, RetryContext, RetryOptions, ConcurrentMapOptions, DebouncedFunction, ThrottledFunction.
• Functions: sleep, withTimeout, retry, mapConcurrent, debounce, throttle.

Async APIs preserve original failure reasons and propagate cancellation through AbortSignal. Debounced functions expose cancel/flush/pending; throttled functions expose cancel/pending.

Base64

• Types: DecodedText.
• Functions: encodeBase64Bytes, decodeBase64Bytes, encodeBase64, decodeBase64, encodeBase64UrlBytes, decodeBase64UrlBytes, encodeBase64Url, decodeBase64Url, encodeLatin1Base64, decodeLatin1Base64, encodeSecureBase64, decodeSecureBase64.

DecodedText works as an ordinary string; only explicit .parseJson<T>() attempts JSON parsing. SecureBase64 is compatibility encoding, not encryption.

Color

• Types: RgbColor, RgbaColor.
• Functions: parseHexColor, formatHexColor, mixHexColors, mixHexColorWithBlack, mixHexColorWithWhite, relativeLuminance, contrastRatio, pickHigherContrastColor.

Crypto

• Types: AesCipherMode, AesPaddingMode, PemKeyPair, EcNamedCurve.
• Randomness and comparison: GenerateRandomBytes, FixedTimeEquals.
• Digests: MD5Encrypt, SHA1Encrypt, SHA256Bytes, SHA256Encrypt, SHA384Bytes, SHA384Encrypt, SHA512Bytes, SHA512Encrypt.
• HMAC and derivation: HMACSHA256Encrypt, HMACSHA384Encrypt, HMACSHA512Encrypt, PBKDF2SHA256, HashPasswordPBKDF2SHA256, VerifyPasswordPBKDF2SHA256, HKDFSHA256.
• AES：AESEncrypt、AESDecrypt、AESEncryptAuthenticated、AESDecryptAuthenticated、AESEncryptWithPassword、AESDecryptWithPassword。
• RSA：GenerateRSAKeyPair、RSAEncryptOAEP、RSADecryptOAEP、RSASignPSS、RSAVerifyPSS。
• EC：GenerateECDSAKeyPair、ECDSASign、ECDSAVerify、GenerateECDHKeyPair、DeriveECDHSecret、DeriveECDHKeySHA256。

import { AESDecryptWithPassword, AESEncryptWithPassword, HashPasswordPBKDF2SHA256, VerifyPasswordPBKDF2SHA256 } from "@fast-china/utils";

const payload = await AESEncryptWithPassword("message", "password");
const plaintext = await AESDecryptWithPassword(payload, "password");
const passwordHash = await HashPasswordPBKDF2SHA256("password");
const valid = await VerifyPasswordPBKDF2SHA256("password", passwordHash);

Date

• Types: DateInput, RelativeTimeOptions, DateShortcut, DateRangeShortcut.
• Functions: toDate, isValidDate, startOfDay, endOfDay, addDays, addMonths, addYears, isSameDay, isFuture, getLocalDayBounds, isWithinInterval, formatRelativeTime, formatChineseRelativeTime, createOneMonthRangeFromToday, isDateAfterNow, getLocalTimeGreeting, createDateRangeShortcuts, createDateShortcuts, getStartOfToday.

DOM

• Types: StyleValue, StyleObject, StyleInput.
• Functions: addCssUnit, serializeStyle.

Environment

• Types: RuntimeKind.
• Functions: isBrowser, isWebWorker, isNode, isUniApp, hasWebCrypto, detectRuntime, isMobileUserAgent, isTabletUserAgent.

Detection describes current capabilities or User-Agent heuristics, not support for every library function.

Function and Identity

• Function：once。
• Identity types: InstallationIdentityConfiguration, InstallationIdentity.
• Identity values: configureInstallationIdentity, installationIdentity, getOrCreateInstallationId.

Installation identity describes one installation in the current storage area; it is not an authentication credential, hardware identifier, or secret.

Logger

• Types: LogLevel, LoggerSink, LoggerOptions, Logger.
• Values: createLogger, configureLogger, logger.

Number

• Types: FormatBytesOptions.
• Functions: clamp, inRange, roundTo, sum, average, lerp, formatBytes, randomInt.

Object and Query

• Types: QueryPrimitive, QueryValue, QueryStringOptions.
• Functions: isPlainObject, hasOwn, cloneDeep, isEqual, pick, omit, omitBy, pickBy, mapValues, shallowEqual, toQueryString.

Storage

• Types: StorageCodec, StorageConfiguration, StorageReadOptions, StorageWriteOptions, StorageArea.
• Values: base64StorageCodec, Local, Session, configureStorage, isStorageConfigured.

String

• Types: ParsedQueryParameters, StringLocale.
• Functions: decodeURIComponentRepeatedly, parseQueryString, isValidJson, splitWords, upperFirst, lowerFirst, camelCase, pascalCase, kebabCase, truncateGraphemes, copy, randomString, generateUuidV4, isUuidV4, escapeHtml, normalizeWhitespace.

Vue

• Types: AwaitableFunction, Breakpoints, ElementSize, EmitHandlers, EventTargetSource, ResizeObserverTarget, UseBreakpointsReturn, UseElementSizeReturn, UseWindowSizeReturn, VueInstallValue, Installable, TSXWithInstall, TypedSlots, TypedSlotsDeclaration.
• Functions: callOptionalFunction, useBreakpoints, useElementSize, useEmits, useEventListener, useExpose, useNow, useResizeObserver, useWindowSize, definePropType, useProps, useRender, makeSlots, withDefineType, withInstall, withNoopInstall, withInstallDirective.

import { definePropType, makeSlots, withInstall } from "@fast-china/utils";
import { defineComponent } from "vue";

const slots = makeSlots<{ default: () => unknown }>();
const valueType = definePropType<string>(String);
const component = withInstall(defineComponent({ name: "ExampleComponent", props: { value: valueType }, slots }));

Vue helpers target component-library authors. Most business applications need only data, async, environment, and Storage APIs.