@types/qrcode

Version 1.5.6
Published 1 month ago
18.5 kB
1 dependency
MIT license

Install

npm i @types/qrcode

yarn add @types/qrcode

pnpm add @types/qrcode

Overview

TypeScript definitions for qrcode

Index

Functions

create()
toBuffer()
toCanvas()
toDataURL()
toFile()
toFileStream()
toString()

Type Aliases

GeneratedQRCodeSegment
ModeId
QRCodeBufferType
QRCodeDataURLType
QRCodeErrorCorrectionLevel
QRCodeFileStreamType
QRCodeFileType
QRCodeMaskPattern
QRCodeSegment
QRCodeSegmentMode
QRCodeStringType
QRCodeToDataURLOptions
QRCodeToFileOptions
QRCodeToSJISFunc
QRCodeToStringOptions

Functions

function create

create: (text: string | QRCodeSegment[], options?: QRCodeOptions) => QRCode;

Creates QR Code symbol and returns a qrcode object.
Parameter text
Text to encode or a list of objects describing segments.

function toBuffer

toBuffer: {
    (
        text: string | QRCodeSegment[],
        callback: (error: Error | null | undefined, buffer: Buffer) => void
    ): void;
    (
        text: string | QRCodeSegment[],
        options?: QRCodeToBufferOptions
    ): Promise<Buffer>;
    (
        text: string | QRCodeSegment[],
        options: QRCodeToBufferOptions,
        callback: (error: Error, buffer: Buffer) => void
    ): void;
};

Returns a Buffer containing a representation of the QR Code image. Only works with png format.

function toCanvas

toCanvas: {
    (
        canvasElement: HTMLCanvasElement,
        text: string | QRCodeSegment[],
        callback: (error: Error | null | undefined) => void
    ): void;
    (
        canvasElement: HTMLCanvasElement,
        text: string | QRCodeSegment[],
        options?: QRCodeRenderersOptions
    ): Promise<void>;
    (
        canvasElement: HTMLCanvasElement,
        text: string | QRCodeSegment[],
        options: QRCodeRenderersOptions,
        callback: (error: Error) => void
    ): void;
    (
        text: string | QRCodeSegment[],
        callback: (error: Error, canvas: HTMLCanvasElement) => void
    ): void;
    (
        text: string | QRCodeSegment[],
        options?: QRCodeRenderersOptions
    ): Promise<HTMLCanvasElement>;
    (
        text: string | QRCodeSegment[],
        options: QRCodeRenderersOptions,
        callback: (error: Error, canvas: HTMLCanvasElement) => void
    ): void;
    (
        canvas: any,
        text: string | QRCodeSegment[],
        callback: (error: Error) => void
    ): void;
    (
        canvas: any,
        text: string | QRCodeSegment[],
        options?: QRCodeRenderersOptions
    ): Promise<void>;
    (
        canvas: any,
        text: string | QRCodeSegment[],
        options: QRCodeRenderersOptions,
        callback: (error: Error) => void
    ): void;
};

Draws qr code symbol to canvas.
Draws qr code symbol to node canvas.

function toDataURL

toDataURL: {
    (
        canvasElement: HTMLCanvasElement,
        text: string | QRCodeSegment[],
        callback: (error: Error | null | undefined, url: string) => void
    ): void;
    (
        canvasElement: HTMLCanvasElement,
        text: string | QRCodeSegment[],
        options?: QRCodeToDataURLOptions
    ): Promise<string>;
    (
        canvasElement: HTMLCanvasElement,
        text: string | QRCodeSegment[],
        options: QRCodeToDataURLOptions,
        callback: (error: Error, url: string) => void
    ): void;
    (
        text: string | QRCodeSegment[],
        callback: (error: Error, url: string) => void
    ): void;
    (
        text: string | QRCodeSegment[],
        options?: QRCodeToDataURLOptions
    ): Promise<string>;
    (
        text: string | QRCodeSegment[],
        options: QRCodeToDataURLOptions,
        callback: (error: Error, url: string) => void
    ): void;
};

Returns a Data URI containing a representation of the QR Code image.

function toFile

toFile: {
    (
        path: string,
        text: string | QRCodeSegment[],
        callback: (error: Error | null | undefined) => void
    ): void;
    (
        path: string,
        text: string | QRCodeSegment[],
        options?: QRCodeToFileOptions
    ): Promise<void>;
    (
        path: string,
        text: string | QRCodeSegment[],
        options: QRCodeToFileOptions,
        callback: (error: Error) => void
    ): void;
};

Saves QR Code to image file. If options.type is not specified, the format will be guessed from file extension.

function toFileStream

toFileStream: {
    (
        stream: stream.Writable,
        text: string | QRCodeSegment[],
        callback: (error: Error | null | undefined) => void
    ): void;
    (
        stream: stream.Writable,
        text: string | QRCodeSegment[],
        options?: QRCodeToFileStreamOptions
    ): Promise<void>;
    (
        stream: stream.Writable,
        text: string | QRCodeSegment[],
        options: QRCodeToFileStreamOptions,
        callback: (error: Error) => void
    ): void;
};

Writes QR Code image to stream. Only works with png format for now.

function toString

toString: {
    (
        text: string | QRCodeSegment[],
        callback: (error: Error | null | undefined, string: string) => void
    ): void;
    (
        text: string | QRCodeSegment[],
        options?: QRCodeToStringOptions
    ): Promise<string>;
    (
        text: string | QRCodeSegment[],
        options: QRCodeToStringOptions,
        callback: (error: Error, string: string) => void
    ): void;
};

Returns a string representation of the QR Code.

Interfaces

interface AlphanumericData

interface AlphanumericData extends DataSegment {}

property data

data: string;

property mode

mode: Mode<'Alphanumeric'>;

interface BitMatrix

interface BitMatrix {}

Helper class to handle QR Code symbol modules.

property data

data: Uint8Array;

property reservedBit

reservedBit: Uint8Array;

property size

size: number;

Symbol size.

method get

get: (row: number, col: number) => number;

Bit value at specified location.

method isReserved

isReserved: (row: number, col: number) => number;

Check if bit at specified location is reserved.

method set

set: (row: number, col: number, value: number, reserved: boolean) => void;

Set bit value at specified location If reserved flag is set, this bit will be ignored during masking process.

method xor

xor: (row: number, col: number, value: number) => void;

Applies xor operator at specified location (used during masking process).

interface ByteData

interface ByteData extends DataSegment {}

property data

data: Uint8Array;

property mode

mode: Mode<'Byte'>;

interface DataSegment

interface DataSegment {}

method getBitsLength

getBitsLength: () => number;

method getLength

getLength: () => number;

interface ErrorCorrectionLevel

interface ErrorCorrectionLevel {}

property bit

bit: 0 | 1 | 2 | 3;

interface KanjiData

interface KanjiData extends DataSegment {}

property data

data: string;

property mode

mode: Mode<'Kanji'>;

interface Mode

interface Mode<TModeId extends ModeId = ModeId> {}

property bit

bit: number;

property ccBits

ccBits: readonly number[];

property id

id: TModeId;

interface NumericData

interface NumericData extends DataSegment {}

property data

data: string;

property mode

mode: Mode<'Numeric'>;

interface QRCode

interface QRCode {}

property errorCorrectionLevel

errorCorrectionLevel: ErrorCorrectionLevel;

Error Correction Level

property maskPattern

maskPattern: QRCodeMaskPattern | undefined;

Calculated Mask pattern

property modules

modules: BitMatrix;

BitMatrix class with modules data

property segments

segments: GeneratedQRCodeSegment[];

Generated segments

property version

version: number;

Calculated QR Code version

interface QRCodeAlphanumericSegment

interface QRCodeAlphanumericSegment {}

property data

data: string;

property mode

mode: 'alphanumeric';

interface QRCodeByteSegment

interface QRCodeByteSegment {}

property data

data: Buffer | Uint8ClampedArray | Uint8Array;

property mode

mode: 'byte';

interface QRCodeKanjiSegment

interface QRCodeKanjiSegment {}

property data

data: string;

property mode

mode: 'kanji';

interface QRCodeNumericSegment

interface QRCodeNumericSegment {}

property data

data: string | number;

property mode

mode: 'numeric';

interface QRCodeOptions

interface QRCodeOptions {}

property errorCorrectionLevel

errorCorrectionLevel?: QRCodeErrorCorrectionLevel | undefined;

Error correction level. 'M'

property maskPattern

maskPattern?: QRCodeMaskPattern | undefined;

Mask pattern used to mask the symbol.
If not specified the more suitable value will be calculated.

property toSJISFunc

toSJISFunc?: QRCodeToSJISFunc | undefined;

Helper function used internally to convert a kanji to its Shift JIS value. Provide this function if you need support for Kanji mode.

property version

version?: number | undefined;

QR Code version. If not specified the more suitable value will be calculated.

interface QRCodeRenderersOptions

interface QRCodeRenderersOptions extends QRCodeOptions {}

property color

color?:
    | {
          /**
           * Color of dark module. Value must be in hex format (RGBA).
           * Note: dark color should always be darker than `color.light`.
           * @default '#000000ff'
           */
          dark?: string | undefined;
          /**
           * Color of light module. Value must be in hex format (RGBA).
           * @default '#ffffffff'
           */
          light?: string | undefined;
      }
    | undefined;

property margin

margin?: number | undefined;

Define how much wide the quiet zone should be. 4

property scale

scale?: number | undefined;

Scale factor. A value of 1 means 1px per modules (black dots). 4

property width

width?: number | undefined;

Forces a specific width for the output image. If width is too small to contain the qr symbol, this option will be ignored. Takes precedence over scale.

interface QRCodeToBufferOptions

interface QRCodeToBufferOptions extends QRCodeRenderersOptions {}

property rendererOpts

rendererOpts?:
    | {
          /**
           * Compression level for deflate.
           * @default 9
           */
          deflateLevel?: number | undefined;
          /**
           * Compression strategy for deflate.
           * @default 3
           */
          deflateStrategy?: number | undefined;
      }
    | undefined;

property type

type?: QRCodeBufferType | undefined;

Output format. Only png supported for Buffer.

interface QRCodeToDataURLOptionsJpegWebp

interface QRCodeToDataURLOptionsJpegWebp extends QRCodeRenderersOptions {}

property rendererOpts

rendererOpts?:
    | {
          /**
           * A number between `0` and `1` indicating image quality.
           * @default 0.92
           */
          quality?: number | undefined;
      }
    | undefined;

property type

type: 'image/jpeg' | 'image/webp';

Data URI format. 'image/png'

interface QRCodeToDataURLOptionsOther

interface QRCodeToDataURLOptionsOther extends QRCodeRenderersOptions {}

property type

type?: Exclude<QRCodeDataURLType, 'image/jpeg' | 'image/webp'> | undefined;

Data URI format. 'image/png'

interface QRCodeToFileOptionsOther

interface QRCodeToFileOptionsOther extends QRCodeRenderersOptions {}

property type

type: Exclude<QRCodeFileType, 'png'> | undefined;

Output format. 'png'

interface QRCodeToFileOptionsPng

interface QRCodeToFileOptionsPng extends QRCodeRenderersOptions {}

property rendererOpts

rendererOpts?:
    | {
          /**
           * Compression level for deflate.
           * @default 9
           */
          deflateLevel?: number | undefined;
          /**
           * Compression strategy for deflate.
           * @default 3
           */
          deflateStrategy?: number | undefined;
      }
    | undefined;

property type

type?: 'png' | undefined;

Output format. 'png'

interface QRCodeToFileStreamOptions

interface QRCodeToFileStreamOptions extends QRCodeRenderersOptions {}

property rendererOpts

rendererOpts?:
    | {
          /**
           * Compression level for deflate.
           * @default 9
           */
          deflateLevel?: number | undefined;
          /**
           * Compression strategy for deflate.
           * @default 3
           */
          deflateStrategy?: number | undefined;
      }
    | undefined;

property type

type?: QRCodeFileStreamType | undefined;

Output format. Only png supported for file stream.

interface QRCodeToStringOptionsOther

interface QRCodeToStringOptionsOther extends QRCodeRenderersOptions {}

property type

type?: Exclude<QRCodeStringType, 'terminal'> | undefined;

Output format. 'utf8'

interface QRCodeToStringOptionsTerminal

interface QRCodeToStringOptionsTerminal extends QRCodeRenderersOptions {}

property small

small?: boolean | undefined;

Outputs smaller QR code. false

property type

type: 'terminal';

Output format. 'utf8'

Type Aliases

type GeneratedQRCodeSegment

type GeneratedQRCodeSegment = NumericData | AlphanumericData | ByteData | KanjiData;

type ModeId

type ModeId = 'Numeric' | 'Alphanumeric' | 'Byte' | 'Kanji';

type QRCodeBufferType

type QRCodeBufferType = 'png';

type QRCodeDataURLType

type QRCodeDataURLType = 'image/png' | 'image/jpeg' | 'image/webp';

type QRCodeErrorCorrectionLevel

type QRCodeErrorCorrectionLevel =
    | 'low'
    | 'medium'
    | 'quartile'
    | 'high'
    | 'L'
    | 'M'
    | 'Q'
    | 'H';

type QRCodeFileStreamType

type QRCodeFileStreamType = 'png';

type QRCodeFileType

type QRCodeFileType = 'png' | 'svg' | 'utf8';

type QRCodeMaskPattern

type QRCodeMaskPattern = 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7;

type QRCodeSegment

type QRCodeSegment =
    | QRCodeNumericSegment
    | QRCodeAlphanumericSegment
    | QRCodeByteSegment
    | QRCodeKanjiSegment
    | {
          mode?: never;
          data: string | Buffer | Uint8ClampedArray | Uint8Array;
      };

type QRCodeSegmentMode

type QRCodeSegmentMode = 'alphanumeric' | 'numeric' | 'byte' | 'kanji';

type QRCodeStringType

type QRCodeStringType = 'utf8' | 'svg' | 'terminal';

type QRCodeToDataURLOptions

type QRCodeToDataURLOptions =
    | QRCodeToDataURLOptionsJpegWebp
    | QRCodeToDataURLOptionsOther;

type QRCodeToFileOptions

type QRCodeToFileOptions = QRCodeToFileOptionsPng | QRCodeToFileOptionsOther;

type QRCodeToSJISFunc

type QRCodeToSJISFunc = (codePoint: string) => number;

type QRCodeToStringOptions

type QRCodeToStringOptions =
    | QRCodeToStringOptionsTerminal
    | QRCodeToStringOptionsOther;

Package Files (1)

index.d.ts

Dependencies (1)

@types/node

Dev Dependencies (0)

No dev dependencies.

Peer Dependencies (0)

No peer dependencies.

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@types/qrcode

Install

Overview

Index

Functions

Interfaces

Type Aliases

Functions

function create

Parameter text

function toBuffer

function toCanvas

function toDataURL

function toFile

function toFileStream

function toString

Interfaces

interface AlphanumericData

property data

property mode

interface BitMatrix

property data

property reservedBit

property size

method get

method isReserved

method set

method xor

interface ByteData

property data

property mode

interface DataSegment

method getBitsLength

method getLength

interface ErrorCorrectionLevel

property bit

interface KanjiData

property data

property mode

interface Mode

property bit

property ccBits

property id

interface NumericData

property data

property mode

interface QRCode

property errorCorrectionLevel

property maskPattern

property modules

property segments

property version

interface QRCodeAlphanumericSegment

property data

property mode

interface QRCodeByteSegment

property data

property mode

interface QRCodeKanjiSegment

property data

property mode

interface QRCodeNumericSegment

property data

property mode

interface QRCodeOptions

property errorCorrectionLevel

property maskPattern

property toSJISFunc

property version

interface QRCodeRenderersOptions

property color

property margin

property scale

property width

interface QRCodeToBufferOptions

property rendererOpts

property type

interface QRCodeToDataURLOptionsJpegWebp

property rendererOpts

property type