### Install Maskdata Module

Source: https://context7.com/sumukha1496/maskdata/llms.txt

Install the maskdata module using npm. This command should be run in your project's root directory.

```bash
npm i maskdata
```

--------------------------------

### Mask Password Example

Source: https://github.com/sumukha1496/maskdata/blob/master/MASKDATA_FOR_TYPESCRIPT.md

Demonstrates how to mask a password using the maskPassword function with custom options. Ensure PasswordMaskOptions are correctly defined.

```javascript
import { maskPassword, PasswordMaskOptions } from 'maskdata';

const password: string = 'myPassword123';
const options: PasswordMaskOptions = {
  maskWith: '*',
  maxMaskedCharacters: 10,
  fixedOutputLength: undefined,
  unmaskedStartCharacters: 2,
  unmaskedEndCharacters: 2
};

const maskedPassword = maskPassword(password, options);
```

--------------------------------

### Mask strings using V2 options

Source: https://github.com/sumukha1496/maskdata/blob/master/README.md

Demonstrates masking a string with specific start and end character visibility using maskStringV2.

```javascript
const MaskData = require('./maskdata');

const stringMaskV2Options = {
  maskWith: "X",
  maxMaskedCharacters: 20, // To limit the output length to 20.
  unmaskedStartCharacters: 4,
  unmaskedEndCharacters: 9,
  fixedOutputLength: undefined
};

const secret = "TEST:U2VjcmV0S2V5MQ==:CLIENT-A";

const maskedSecret = MaskData.maskStringV2(password, stringMaskV2Options);
//Output: TESTXXXXXXX:CLIENT-A

stringMaskV2Options.unmaskedStartCharacters = 0;

maskedSecret = MaskData.maskStringV2(password, stringMaskV2Options);
//Output: XXXXXXXXXXX:CLIENT-A
```

--------------------------------

### Mask all characters in a string

Source: https://github.com/sumukha1496/maskdata/blob/master/README.md

Examples of masking all characters in a string with or without preserving spaces.

```javascript
const str = "This is a test String";

const strAfterMasking = MaskData.maskString(str, maskStringOptions);

const stringMaskOptions = {
  maskWith: "*",
  values: [],
  maskAll: true,
  maskSpace: false   // Maks all characters except spaces
};

// Output: **** ** * **** *****

const str = "This is a test String";

const strAfterMasking = MaskData.maskString(str, maskStringOptions);

const stringMaskOptions = {
  maskWith: "*",
  values: [],
  maskAll: true,
  maskSpace: true   // Mask all characters including spaces
};

// Output: ********************
```

--------------------------------

### Mask Password with Custom Configuration

Source: https://github.com/sumukha1496/maskdata/blob/master/documentation/mask_password_with_the_default_configuration.md

Applies custom masking options to preserve specific start and end characters while masking the middle portion.

```javascript
const MaskData = require('./maskdata');

const maskPasswordOptions = {
  maskWith: "X",
  maxMaskedCharacters: 20, // To limit the output String length to 20.
  unmaskedStartCharacters: 4,
  unmaskedEndCharacters: 9, // As the last 9 characters of the secret key is meta info which can be printed for debugging or other purposes
  fixedOutputLength: undefined
};

const password = "TEST:U2VjcmV0S2V5MQ==:CLIENT-A";

const maskedPassword = MaskData.maskPassword(password, maskPasswordOptions);
//Output: TESTXXXXXXX:CLIENT-A

maskPasswordOptions.unmaskedStartCharacters = 0;

const maskedPassword = MaskData.maskPassword(password, maskPasswordOptions);
//Output: XXXXXXXXXXX:CLIENT-A
```

--------------------------------

### Mask Multiple Fields with Wildcards

Source: https://github.com/sumukha1496/maskdata/blob/master/README.md

This example shows how to mask fields within arrays and nested objects using wildcard characters in the field paths. It demonstrates masking all elements in an array and specific nested fields.

```javascript
const jsonInput = {
  cards: [
    {
      number: '1234-5678-8765-1234'
    },
    {
      number: '1111-2222-1111-2222'
    },
    {
      number: '0000-1111-2222-3333'
    },
    {
      name: "No card number here"
    }
  ],
  emails: {
    primaryEmail: 'primary@Email.com', 
    secondaryEmail: 'secondary@Email.com',
    moreEmails: ["email1@email.com", "email2@email.com", "email3@email.com", {childEmail: "child@child.com", secondChild: {nestedkid: "hello@hello.com"}}]
  },
  array: ["element1", "element22", "element333"],
  jwt: 'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiJsb2wiLCJuYW1lIjoiVGVzdCIsImlhdCI6ImxvbCJ9.XNDxZcBWWEKYkCiu6XFGmAeuPF7iFnI7Sdv91gVZJMU'
};

const jsonMaskConfig = {
  cardMaskOptions: { maskWith: "X", unmaskedStartDigits: 0, unmaskedEndDigits: 0},

  emailMaskOptions: { maskWith: "*", unmaskedStartCharactersBeforeAt: 0, 
  unmaskedEndCharactersAfterAt: 0, maskAtTheRate: false },

  stringMaskOptions: { maskWith: "?", maskOnlyFirstOccurance: false, values: [], maskAll: true, maskSpace: false },
  jwtMaskOptions: { maskWith: '*', maxMaskedCharacters: 32, maskDot: false, maskHeader: true, maskPayload: true, maskSignature: true},

  cardFields: ['cards[*].number'],
  emailFields: ['emails.*'],
  stringFields: ['array.*'],
  jwtFields: ['jwt']
}

const maskedOutput = maskData.maskJSON2(jsonInput, jsonMaskConfig);
```

--------------------------------

### maskStringV2

Source: https://context7.com/sumukha1496/maskdata/llms.txt

A generic string masking function that allows for configurable output length and visibility of characters at the start and end positions.

```APIDOC
## maskStringV2

### Description
Generic string masking function with configurable output length and character visibility at start/end positions.

### Method
N/A (This is a library function, not an API endpoint)

### Endpoint
N/A

### Parameters
#### Request Body (Implicit)
- **secret** (string) - The string to be masked.
- **options** (object) - Configuration options for masking:
  - **maskWith** (string) - Character to mask with (default: '*').
  - **maxMaskedCharacters** (number) - Maximum output length (default: 256).
  - **fixedOutputLength** (number | undefined) - Fixed output length if set.
  - **unmaskedStartCharacters** (number) - Starting characters to keep visible (default: 0).
  - **unmaskedEndCharacters** (number) - Ending characters to keep visible (default: 0).

### Request Example
```javascript
const MaskData = require('maskdata');

const stringMaskOptions = {
  maskWith: "*",
  maxMaskedCharacters: 256,
  fixedOutputLength: undefined,
  unmaskedStartCharacters: 0,
  unmaskedEndCharacters: 0
};

const secret = "SensitiveData123";
const maskedString = MaskData.maskStringV2(secret, stringMaskOptions);
// Output: ****************

const customOptions = {
  maskWith: "X",
  maxMaskedCharacters: 20,
  unmaskedStartCharacters: 4,
  unmaskedEndCharacters: 4
};
const maskedCustom = MaskData.maskStringV2("TEST:SecretData:INFO", customOptions);
// Output: TESTXXXXXXXXXXINFO
```

### Response
#### Success Response (200)
- **maskedString** (string) - The masked string.

#### Response Example
```json
{
  "maskedString": "****************"
}
```
```

--------------------------------

### Mask Email with Custom Options

Source: https://github.com/sumukha1496/maskdata/blob/master/documentation/mask_email_id.md

Applies masking to an email address using specific character counts for the start and end segments.

```javascript
const MaskData = require('./maskdata');

const emailMask2Options = {
    maskWith: "*", 
    unmaskedStartCharactersBeforeAt: 3,
    unmaskedEndCharactersAfterAt: 2,
    maskAtTheRate: false
};

const email = "my.test.email@testEmail.com";

const maskedEmail = MaskData.maskEmail2(email, emailMask2Options);

//Output: my.********@**********om
```

--------------------------------

### CardMaskOptions Interface

Source: https://github.com/sumukha1496/maskdata/blob/master/MASKDATA_FOR_TYPESCRIPT.md

Defines the configuration options for masking credit card numbers. Specify the masking character and the number of digits to keep unmasked at the start and end.

```typescript
{
    maskWith?: string;
    unmaskedStartDigits?: number;
    unmaskedEndDigits?: number;
}
```

--------------------------------

### UuidMaskOptions Interface

Source: https://github.com/sumukha1496/maskdata/blob/master/MASKDATA_FOR_TYPESCRIPT.md

Defines configuration options for masking UUIDs. Customize the masking character and the number of characters to keep unmasked at the start and end.

```typescript
{
    maskWith?: string;
    unmaskedStartCharacters?: number;
    unmaskedEndCharacters?: number;
}
```

--------------------------------

### maskEmail2 Method

Source: https://github.com/sumukha1496/maskdata/blob/master/documentation/mask_email_id.md

This method masks an email address based on provided configuration options. It supports defining unmasked start characters before the '@' and unmasked end characters after the '@'.

```APIDOC
## maskEmail2(email, options)

### Description
Masks an email address using custom configuration options. If no options are provided, default masking is applied.

### Parameters
- **email** (string) - Required - The email address to be masked.
- **options** (object) - Optional - Configuration object:
  - **maskWith** (string) - Character used for masking (default: '*').
  - **unmaskedStartCharactersBeforeAt** (number) - Number of characters before '@' to remain unmasked.
  - **unmaskedEndCharactersAfterAt** (number) - Number of characters after '@' to remain unmasked.
  - **maskAtTheRate** (boolean) - Whether to mask the '@' symbol itself.

### Request Example
const emailMask2Options = {
    maskWith: "*", 
    unmaskedStartCharactersBeforeAt: 3,
    unmaskedEndCharactersAfterAt: 2,
    maskAtTheRate: false
};
const maskedEmail = MaskData.maskEmail2("my.test.email@testEmail.com", emailMask2Options);

### Response
- **maskedEmail** (string) - The resulting masked email string.
```

--------------------------------

### Get Nested JSON Property

Source: https://github.com/sumukha1496/maskdata/blob/master/README.md

Retrieves the value of a nested JSON property using a dot-notation string path. Returns undefined if the property does not exist.

```javascript
const MaskData = require('./maskdata');

const innerPropety = Maskdata.getInnerProperty(object, field);

Example: 

const nestedObject = {
  level1: {
    field1: "field1",
    level2: {
      field2: "field2",
      level3: {
        field3: "field3",
        field4: [ { Hello: "world" }, { Hello: "Newworld" }, "Just a String" ]
      }
    }
  },
  value1: "value"
};

const innerPropety = Maskdata.getInnerProperty(nestedObject, 'level1.level2.level3.field4[0].Hello');
```

--------------------------------

### Recursive Card Number Masking

Source: https://github.com/sumukha1496/maskdata/blob/master/README.md

Apply recursive masking to card numbers using specific card masking configurations. This allows for partial unmasking of digits at the start and end.

```javascript
const inputJson = {
  cards: [
    {
      number: "1234-5678-0123-0000"
    },
    {
      number: "1111-2222-3333-4444"
    },
    {
      number: "2222-4444-6666-8888"
    },
    {
      number: "1111-3333-5555-7777"
    },
    {
      number: "0000-0000-0000-0000"
    }
  ]
};

const cardfieldsToMask = ["*number"];  // Specify the field with a '*' at the beginning and NO dot(.) anywhere else in that field.
    
const jsonMaskConfig = {
  cardMaskOptions: {
        maskWith: "*",
        unmaskedStartDigits: 4,
        unmaskedEndDigits: 1
    },
  cardFields: cardfieldsToMask, 
};

const maskedOutput = maskData.maskJSON2(inputJson, jsonMaskConfig);

// Output: 
{
  cards: [
    { number: '1234-****-****-***0' },
    { number: '1111-****-****-***4' },
    { number: '2222-****-****-***8' },
    { number: '1111-****-****-***7' },
    { number: '0000-****-****-***0' }
  ]
}
```

--------------------------------

### Mask Phone Numbers

Source: https://context7.com/sumukha1496/maskdata/llms.txt

Masks phone numbers while preserving a configurable number of starting and ending digits. Only numerical digits are masked. Options include the masking character, number of starting digits to keep visible, and number of ending digits to keep visible.

```javascript
const MaskData = require('maskdata');

const maskPhoneOptions = {
  maskWith: "*",           // Character to mask with (default: '*')
  unmaskedStartDigits: 5,  // Starting digits to keep visible (default: 4)
  unmaskedEndDigits: 1     // Ending digits to keep visible (default: 1)
};

const phoneNumber = "+911234567890";
const maskedPhone = MaskData.maskPhone(phoneNumber, maskPhoneOptions);
// Output: +9112*******0

// With default options
const maskedDefault = MaskData.maskPhone("+111234567890");
// Output: +111********0
```

--------------------------------

### Basic JSON Masking with Default Configurations

Source: https://github.com/sumukha1496/maskdata/blob/master/documentation/mask_email_id_with_the_default_configuration.md

Demonstrates masking common sensitive fields like credit cards, emails, and phone numbers using default masking options. Ensure the 'maskData' library is imported.

```javascript
const jsonInput = {
  'credit': '1234-5678-8765-1234', 
  'debit': '0000-1111-2222-3333',
  'primaryEmail': 'primary@Email.com', 
  'secondaryEmail': 'secondary@Email.com',
  'password': 'dummyPassword',
  'homePhone': "+1 1234567890",
  'workPhone': "+1 9876543210",
  'addressLine1': "This is my addressline 1. This is my home",
  'addressLine2': "AddressLine 2",
  'uuid1': '123e4567-e89b-12d3-a456-426614174000',
  'randomStrings': {
    'row1': 'This is row 1 random string',
    'row2': ['Entry1', 'Entry2', 'Entry3'],
    'row3': {
      'key1': 'Row3 Object 1',
      'key2': 'Row3 Object 2',
      'key3': ['Entry1', 'Entry2', 'Entry3']
    }
  }
};

const jsonMaskConfig = {
    cardFields: ['credit', 'debit'],
    emailFields: ['primaryEmail', 'secondaryEmail'],
    passwordFields: ['password'],
    phoneFields: ['homePhone', 'workPhone'],
    stringMaskOptions:  {
      maskWith: "*",
      maskOnlyFirstOccurance: false,
      values: ["This"]
    },
    stringFields: ['addressLine1', 'addressLine2'],
    uuidFields: ['uuid1'],
    genericStrings: [
        {
          fields: ['randomStrings.row1'],
          config: {
            maskWith: '*', 
            unmaskedStartCharacters: 2,
            unmaskedEndCharacters: 3,
            maxMaskedCharacters: 8
          }
        },
        { fields: ['randomStrings.row2.*'], config: { maskWith: 'X', unmaskedEndCharacters: 1 } },
        { fields: ['randomStrings.row3.key1'] },
        {
          fields: ['randomStrings.row3.key3.*'],
          config: { maskWith: '@', unmaskedEndCharacters: 1 }
        }
    ]
};

const maskedJsonOutput = maskData.maskJSON2(jsonInput, jsonMaskConfig);
```

--------------------------------

### Initialize Maskdata

Source: https://github.com/sumukha1496/maskdata/blob/master/documentation/main.md

Basic import statement required to use the maskdata module.

```javascript
const MaskData = require('./maskdata');
```

--------------------------------

### All Available Imports

Source: https://github.com/sumukha1496/maskdata/blob/master/MASKDATA_FOR_TYPESCRIPT.md

Lists all available functions and types that can be imported from the maskdata package for various masking operations.

```javascript
import { maskPassword, PasswordMaskOptions, maskJSON2, JsonMask2Configs, maskPhone, PhoneMaskOptions, maskEmail2, EmailMask2Options, maskCard, CardMaskOptions, maskString, StringMaskOptions, maskUuid, UuidMaskOptions, maskJwt, JwtMaskOptions, maskStringV2, GenericStringMaskOptions, StringMaskV2Options, getInnerProperty, replaceValue } from 'maskdata';
```

--------------------------------

### Configure and Use maskStringV2

Source: https://context7.com/sumukha1496/maskdata/llms.txt

Use maskStringV2 for generic string masking with options for mask character, maximum length, fixed output length, and visible start/end characters. Requires importing the MaskData module.

```javascript
const MaskData = require('maskdata');

const stringMaskOptions = {
  maskWith: "*",                   // Character to mask with (default: '*')
  maxMaskedCharacters: 256,        // Maximum output length (default: 256)
  fixedOutputLength: undefined,    // Fixed output length if set
  unmaskedStartCharacters: 0,      // Starting characters to keep visible (default: 0)
  unmaskedEndCharacters: 0         // Ending characters to keep visible (default: 0)
};

const secret = "SensitiveData123";
const maskedString = MaskData.maskStringV2(secret, stringMaskOptions);
// Output: ****************

// With custom visibility
const customOptions = {
  maskWith: "X",
  maxMaskedCharacters: 20,
  unmaskedStartCharacters: 4,
  unmaskedEndCharacters: 4
};
const maskedCustom = MaskData.maskStringV2("TEST:SecretData:INFO", customOptions);
// Output: TESTXXXXXXXXXXINFO
```

--------------------------------

### Mask Password with Default Configuration

Source: https://github.com/sumukha1496/maskdata/blob/master/documentation/mask_password_with_the_default_configuration.md

Uses the default library settings to mask a password string.

```javascript
const MaskData = require('./maskdata');

  /** Default Options
    maskWith: "*"
    maxMaskedCharacters: 16,
    unmaskedStartCharacters: 0,
    fixedOutputLength: undefined,
    unmaskedEndCharacters: 0
  **/

const password = "Password1$";

const maskedPassword = MaskData.maskPassword(password)
```

--------------------------------

### Mask JWT Token with Default Options

Source: https://github.com/sumukha1496/maskdata/blob/master/documentation/mask_jwt_token.md

Demonstrates masking all parts of a JWT token using default configuration settings.

```javascript
const MaskData = require('./maskdata');

const jwtMaskOptions = {
  // Character to mask the data. The default value is '*'
  maskWith: '*',

  // Max masked characters in the output(EXCLUDING the unmasked characters). Default value is 512
  maxMaskedCharacters: 512,

  // Config to mask OR keep the dots(.). Default value is true, i.e, mask dots
  maskDot: true,

  // Config to mask OR keep the first part of the JWT. i.e, the header part. Default value is true, i.e, mask the header part
  maskHeader: true,

  // Config to mask OR keep the second part of the JWT. i.e, the payload part. Default value is true, i.e, mask the payload part
  maskPayload: true,

  // Config to mask OR keep the third part of the JWT. i.e, the signature part. Default value is true, i.e, mask the signature part
  maskSignature: true
};

const jwt =
  'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpYXQiOjE1MTYyMzkwMjJ9.tbDepxpstvGdW8TC3G8zg4B6rUYAOvfzdceoH48wgRQ';

/** In this example,
 * Header = eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9
 * Payload = eyJpYXQiOjE1MTYyMzkwMjJ9
 * Signature = tbDepxpstvGdW8TC3G8zg4B6rUYAOvfzdceoH48wgRQ
 */ 
const maskedJwt = MaskData.maskJwt(jwt, jwtMaskOptions);

// Output:
*********************************************************************************************************
```

--------------------------------

### Mask JSON with Custom Field-Specific Configurations

Source: https://github.com/sumukha1496/maskdata/blob/master/README.md

Shows how to apply custom masking options for different field types like cards, emails, and passwords.

```javascript
const jsonInput2 = {
  'credit': '1234-5678-8765-1234', 
  'debit': '0000-1111-2222-3333', 
  'primaryEmail': 'primary@Email.com', 
  'secondaryEmail': 'secondary@Email.com',
  'password': 'dummyPasswordANDdummyPassword',
  'homePhone': "+1 1234567890",
  'workPhone': "+1 9876543210",
  'addressLine1': "This is my addressline 1. This is my home",
  'addressLine2': "AddressLine 2",
  'uuid1': '123e4567-e89b-12d3-a456-426614174000'
};

const jsonMaskConfig2 = {
    // Card
    cardMaskOptions: { maskWith: "X", unmaskedStartDigits: 2,unmaskedEndDigits: 4 },
    cardFields: ['credit', 'debit'],

    // Email
    emailMaskOptions: { maskWith: "*", unmaskedStartCharactersBeforeAt: 2, unmaskedEndCharactersAfterAt: 2, maskAtTheRate: false },
    emailFields: ['primaryEmail', 'secondaryEmail'],

    // Password
    passwordMaskOptions: { maskWith: "*", maxMaskedCharacters: 10, unmaskedStartCharacters: 0, unmaskedEndCharacters: 0 },
    passwordFields: ['password'],

    // Phone
    phoneMaskOptions: { maskWith: "*", unmaskedStartDigits: 2, unmaskedEndDigits: 1 },
    phoneFields: ['homePhone', 'workPhone'],

    // String
    stringMaskOptions: { maskWith: "*", maskOnlyFirstOccurance: false, values: [], maskAll: true, maskSpace: false },
    stringFields: ['addressLine1', 'addressLine2'],

    // UUID
    uuidMaskOptions: { maskWith: "*", unmaskedStartCharacters: 4, unmaskedEndCharacters: 2 },
    uuidFields: ['uuid1']
};

const maskedJsonOutput2 = maskData.maskJSON2(jsonInput2, jsonMaskConfig2);
```

--------------------------------

### Mask Phone Number with Custom Options

Source: https://github.com/sumukha1496/maskdata/blob/master/documentation/mask_phone_number.md

Use MaskData.maskPhone to mask phone numbers. Customize the masking character and the number of digits to keep unmasked from the start and end.

```javascript
const MaskData = require('./maskdata');

const maskPhoneOptions = {
  // Character to mask the data
  // default value is '*'
  maskWith: "*",

  //Should be positive Integer
  // If the starting 'n' digits need to be unmasked
  // Default value is 4
  unmaskedStartDigits: 5, 

  // Should be positive Integer
  //If the ending 'n' digits need to be unmasked
  // Default value is 1
  unmaskedEndDigits: 1 
};

const phoneNumber = "+911234567890";

const maskedPhoneNumber = MaskData.maskPhone(phoneNumber, maskPhoneOptions);
//Output: +9112*******0

```

--------------------------------

### Configure Masking for Multiple Data Types

Source: https://github.com/sumukha1496/maskdata/blob/master/README.md

Use this configuration to mask card numbers, emails, passwords, phone numbers, strings, and UUIDs. Specify options for each data type and the fields to apply them to.

```javascript
const jsonInput2 = {
    cards: {
        creditCards: ['1234-5678-8765-1234', '1111-2222-1111-2222'],
        debitCards: ['0000-1111-2222-3333', '2222-3333-4444-4444']
    },
    emails: {
        primaryEmail: 'primary@Email.com',
        secondaryEmail: 'secondary@Email.com'
    },
    passwords: [['password123', 'password456']],
    phones: {
        homePhone: '+1234567890',
        workPhone: '+1987654321'
    },
    address: {
        addressLine1: '123 Main Street, Anytown, USA',
        addressLine2: 'Apt 4B'
    },
    uuids: {
        uuid1: '123e4567-e89b-12d3-a456-426614174000'
    },
    jwt: 'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpYXQiOjE1MTYyMzkwMjJ9.tbDepxpstvGdW8TC3G8zg4B6rUYAOvfzdceoH48wgRQ'
};

const jsonMaskConfig2 = {
    // Card
    cardMaskOptions: { maskWith: "X", unmaskedStartDigits: 2,unmaskedEndDigits: 4 },
    cardFields: ['cards.creditCards[0]', 'cards.creditCards[1]', 'cards.debitCards[0]', 'cards.debitCards[1]'],

    // Email
    emailMaskOptions: { maskWith: "*", unmaskedStartCharactersBeforeAt: 2, unmaskedEndCharactersAfterAt: 2, maskAtTheRate: false },
    emailFields: ['emails.primaryEmail', 'emails.secondaryEmail'],

    // Password
    passwordMaskOptions: { maskWith: "*", maxMaskedCharacters: 10, unmaskedStartCharacters: 0, unmaskedEndCharacters: 0 },
    passwordFields: ['passwords[0][0]]', 'passwords[0][1]'],

    // Phone
    phoneMaskOptions: { maskWith: "*", unmaskedStartDigits: 2, unmaskedEndDigits: 1 },
    phoneFields: ['phones.homePhone', 'phones.workPhone'],

    // String
    stringMaskOptions: { maskWith: "*", maskOnlyFirstOccurance: false, values: [], maskAll: true, maskSpace: false },
    stringFields: ['address.addressLine1', 'address.addressLine2'],

    // UUID
    uuidMaskOptions: { maskWith: "*", unmaskedStartCharacters: 4, unmaskedEndCharacters: 2 },
    uuidFields: ['uuids.uuid1']

    // JWT
    jwtMaskOptions: { maskWith: '*', maxMaskedCharacters: 512, maskDot: true, maskHeader: true, maskPayload: true, maskSignature: true},
    jwtFields: ['jwt']
};

const maskedJsonOutput2 = MaskData.maskJSON2(jsonInput2, jsonMaskConfig2);
```

--------------------------------

### Mask JSON with Generic and Specific Field Configurations

Source: https://github.com/sumukha1496/maskdata/blob/master/README.md

Demonstrates masking various data types including nested objects and arrays using specific field configurations.

```javascript
const jsonInput = {
  'credit': '1234-5678-8765-1234', 
  'debit': '0000-1111-2222-3333', 
  'primaryEmail': 'primary@Email.com', 
  'secondaryEmail': 'secondary@Email.com',
  'password': 'dummyPassword',
  'homePhone': "+1 1234567890",
  'workPhone': "+1 9876543210",
  'addressLine1': "This is my addressline 1. This is my home",
  'addressLine2': "AddressLine 2",
  'uuid1': '123e4567-e89b-12d3-a456-426614174000',
  'randomStrings': {
    'row1': 'This is row 1 random string',
    'row2': ['Entry1', 'Entry2', 'Entry3'],
    'row3': {
      'key1': 'Row3 Object 1',
      'key2': 'Row3 Object 2',
      'key3': ['Entry1', 'Entry2', 'Entry3']
    }
  }
};

const jsonMaskConfig = {
    cardFields: ['credit', 'debit'],
    emailFields: ['primaryEmail', 'secondaryEmail'],
    passwordFields: ['password'],
    phoneFields: ['homePhone', 'workPhone'],
    stringMaskOptions:  {
      maskWith: "*",
      maskOnlyFirstOccurance: false,
      values: ["This"]
    },
    stringFields: ['addressLine1', 'addressLine2'],
    uuidFields: ['uuid1'],
    genericStrings: [
        {
          fields: ['randomStrings.row1'],
          config: {
            maskWith: '*',
            unmaskedStartCharacters: 2,
            unmaskedEndCharacters: 3,
            maxMaskedCharacters: 8
          }
        },
        { fields: ['randomStrings.row2.*'], config: { maskWith: 'X', unmaskedEndCharacters: 1 } },
        { fields: ['randomStrings.row3.key1'] },
        {
          fields: ['randomStrings.row3.key3.*'],
          config: { maskWith: '@', unmaskedEndCharacters: 1 }
        }
    ]
};

const maskedJsonOutput = maskData.maskJSON2(jsonInput, jsonMaskConfig);
```

--------------------------------

### Mask Email with Default Configuration

Source: https://github.com/sumukha1496/maskdata/blob/master/documentation/mask_email_id_with_the_default_configuration.md

Use this function to mask email addresses with default settings. No configuration is needed for basic email masking.

```javascript
const MaskData = require('./maskdata');

/** Default Options
    maskWith: "*", 
    unmaskedStartCharactersBeforeAt: 3,
    unmaskedEndCharactersAfterAt: 2,
    maskAtTheRate: false
**/
const email = "my.test.email@testEmail.com";

const maskedEmail = MaskData.maskEmail2(email);

//Output: my.********@**********om
```

--------------------------------

### Mask Phone Number with Custom Options

Source: https://github.com/sumukha1496/maskdata/blob/master/README.md

Masks a phone number using custom options for unmasking the start and end digits. `unmaskedStartDigits` controls how many digits from the beginning are shown, and `unmaskedEndDigits` controls how many from the end are shown.

```javascript
const MaskData = require('./maskdata');

const maskPhoneOptions = {
  // Character to mask the data
  // default value is '*'
  maskWith: "*",

  //Should be positive Integer
  // If the starting 'n' digits need to be unmasked
  // Default value is 4
  unmaskedStartDigits: 5, 

  // Should be positive Integer
  //If the ending 'n' digits need to be unmasked
  // Default value is 1
  unmaskedEndDigits: 1 
};

const phoneNumber = "+911234567890";

const maskedPhoneNumber = MaskData.maskPhone(phoneNumber, maskPhoneOptions);
//Output: +9112*******0
```

--------------------------------

### Custom Masking Configurations for Field Types

Source: https://github.com/sumukha1496/maskdata/blob/master/documentation/mask_email_id_with_the_default_configuration.md

Applies specific masking rules for each data type (card, email, password, phone, string, UUID) by defining custom options. This allows for fine-grained control over how each type of sensitive data is masked.

```javascript
const jsonInput2 = {
  'credit': '1234-5678-8765-1234', 
  'debit': '0000-1111-2222-3333',
  'primaryEmail': 'primary@Email.com', 
  'secondaryEmail': 'secondary@Email.com',
  'password': 'dummyPasswordANDdummyPassword',
  'homePhone': "+1 1234567890",
  'workPhone': "+1 9876543210",
  'addressLine1': "This is my addressline 1. This is my home",
  'addressLine2': "AddressLine 2",
  'uuid1': '123e4567-e89b-12d3-a456-426614174000'
};

const jsonMaskConfig2 = {
    // Card
    cardMaskOptions: { maskWith: "X", unmaskedStartDigits: 2,unmaskedEndDigits: 4 },
    cardFields: ['credit', 'debit'],

    // Email
    emailMaskOptions: { maskWith: "*", unmaskedStartCharactersBeforeAt: 2, unmaskedEndCharactersAfterAt: 2, maskAtTheRate: false },
    emailFields: ['primaryEmail', 'secondaryEmail'],

    // Password
    passwordMaskOptions: { maskWith: "*", maxMaskedCharacters: 10, unmaskedStartCharacters: 0, unmaskedEndCharacters: 0 },
    passwordFields: ['password'],

    // Phone
    phoneMaskOptions: { maskWith: "*", unmaskedStartDigits: 2, unmaskedEndDigits: 1 },
    phoneFields: ['homePhone', 'workPhone'],

    // String
    stringMaskOptions: { maskWith: "*", maskOnlyFirstOccurance: false, values: [], maskAll: true, maskSpace: false },
    stringFields: ['addressLine1', 'addressLine2'],

    // UUID
    uuidMaskOptions: { maskWith: "*", unmaskedStartCharacters: 4, unmaskedEndCharacters: 2 },
    uuidFields: ['uuid1']
};

const maskedJsonOutput2 = maskData.maskJSON2(jsonInput2, jsonMaskConfig2);
```

--------------------------------

### Mask Credit/Debit Card Numbers

Source: https://context7.com/sumukha1496/maskdata/llms.txt

Masks digits in a credit/debit card number while preserving non-numeric delimiters. Customizable options include the masking character, number of starting digits to keep visible, and number of ending digits to keep visible.

```javascript
const MaskData = require('maskdata');

const maskCardOptions = {
  maskWith: "*",           // Character to mask with (default: '*')
  unmaskedStartDigits: 4,  // Number of starting digits to keep visible (default: 4)
  unmaskedEndDigits: 1     // Number of ending digits to keep visible (default: 1)
};

const cardNumber = "1234-5678-8765-1234";
const maskedCard = MaskData.maskCard(cardNumber, maskCardOptions);
// Output: 1234-****-****-***4

// With default options (no config passed)
const maskedDefault = MaskData.maskCard("1234-5678-8765-1234");
// Output: 1234-****-****-***4
```

--------------------------------

### PasswordMaskOptions Interface

Source: https://github.com/sumukha1496/maskdata/blob/master/MASKDATA_FOR_TYPESCRIPT.md

Defines the configuration options for masking passwords. Customize masking character, length, and unmasked portions.

```typescript
{
    maskWith?: string;
    maxMaskedCharacters?: number;
    fixedOutputLength?: undefined | number;
    unmaskedStartCharacters?: number;
    unmaskedEndCharacters?: number;
}
```

--------------------------------

### Mask Password with Custom Options

Source: https://github.com/sumukha1496/maskdata/blob/master/documentation/mask_password.md

Use this snippet to mask a password with custom options such as mask character, maximum masked characters, fixed output length, and unmasked start/end characters. Ensure the MaskData library is imported.

```javascript
const MaskData = require('./maskdata');

const maskPasswordOptions = {
  // Character to mask the data
  // default value is '*'
  maskWith: "*",

  // To limit the *s in the response when the password length is more
  // Default value is 16
  maxMaskedCharacters: 16,

  // To fix the length of output irrespective of the length of the input. This comes in handy when the input length < maxMaskedCharacters but we want a fixed output length.
  // Default value is undefined. If this value is set, then maxMaskedCharacters will not be considered and the output length will always be equal to fixedOutputLength characters.
  fixedOutputLength: undefined,

  // To show(not mask) first 'n' characters in the password/secret key. 
  // Default value is 0. 
  unmaskedStartCharacters: 0,

  // To show(not mask) last 'n' characters in the password/secret key. 
  // Default value is 0. 
  unmaskedEndCharacters: 0
};

const password = "Password1$";

const maskedPassword = MaskData.maskPassword(password, maskPasswordOptions);

//Output: **********
```

--------------------------------

### Detailed JSON Masking Configurations

Source: https://github.com/sumukha1496/maskdata/blob/master/documentation/mask_email_id_with_the_default_configuration.md

Provides detailed configuration options for masking various data types within a JSON object, including specific settings for card numbers, emails, passwords, phone numbers, strings, UUIDs, and JWT tokens.

```javascript
const defaultjsonMask2Configs = {
    cardMaskOptions: {
        maskWith: "*",
        unmaskedStartDigits: 4,
        unmaskedEndDigits: 1
    },
    cardFields: [],

    emailMaskOptions: {
        maskWith: "*",
        unmaskedStartCharactersBeforeAt: 3,
        unmaskedEndCharactersAfterAt: 2,
        maskAtTheRate: false
    },
    emailFields: [],

    passwordMaskOptions: {
        maskWith: "*",
        maxMaskedCharacters: 16,
        unmaskedStartCharacters: 0,
        unmaskedEndCharacters: 0
    },
    passwordFields: [],

    phoneMaskOptions: {
        maskWith: "*",
        unmaskedStartDigits: 4,
        unmaskedEndDigits: 1
    },
    phoneFields: [],

    stringMaskOptions:  {
        maskWith: "*",
        maskOnlyFirstOccurance: false,
        values: [],
        maskAll: false,
        maskSpace: true
    },
    stringFields: [],

    uuidMaskOptions: {
        maskWith: "*",
        unmaskedStartCharacters: 0,
        unmaskedEndCharacters: 0
    },
    uuidFields: [],

    jwtMaskOptions: {
        maskWith: '*',
        maxMaskedCharacters: 512,
        maskDot: true,
        maskHeader: true,
        maskPayload: true,
        maskSignature: true
    },
    jwtFields: [],
    // To extend the mask function to other types of data. 
    genericStrings: [
      {
        config: {
          maskWith: "*",
          maxMaskedCharacters: 256,
          unmaskedStartDigits: 0,
          unmaskedEndDigits: 0
        },
        fields: []
      }
    ]
};

```

--------------------------------

### Mask Phone Number with Default Configuration

Source: https://github.com/sumukha1496/maskdata/blob/master/README.md

Masks a phone number using the default configuration of the `maskPhone` function. No options object needs to be passed.

```javascript
const MaskData = require('./maskdata');

/** Default Options
  maskWith: "*"
  unmaskedStartDigits: 4
  unmaskedEndDigits: 1 
**/
const phoneNumber = "+111234567890";

const maskedPhoneNumber = MaskData.maskPhone(phoneNumber);
```

--------------------------------

### Configure and Apply JSON Masking

Source: https://github.com/sumukha1496/maskdata/blob/master/documentation/mask_email_id_with_the_default_configuration.md

Defines masking options for multiple data fields and applies them to a JSON object using MaskData.maskJSON2.

```javascript
const jsonMaskConfig2 = {
    // Card
    cardMaskOptions: { maskWith: "X", unmaskedStartDigits: 2,unmaskedEndDigits: 4 },
    cardFields: ['cards.creditCards[0]', 'cards.creditCards[1]', 'cards.debitCards[0]', 'cards.debitCards[1]'],

    // Email
    emailMaskOptions: { maskWith: "*", unmaskedStartCharactersBeforeAt: 2, unmaskedEndCharactersAfterAt: 2, maskAtTheRate: false },
    emailFields: ['emails.primaryEmail', 'emails.secondaryEmail'],

    // Password
    passwordMaskOptions: { maskWith: "*", maxMaskedCharacters: 10, unmaskedStartCharacters: 0, unmaskedEndCharacters: 0 },
    passwordFields: ['passwords[0][0]]', 'passwords[0][1]'],

    // Phone
    phoneMaskOptions: { maskWith: "*", unmaskedStartDigits: 2, unmaskedEndDigits: 1 },
    phoneFields: ['phones.homePhone', 'phones.workPhone'],

    // String
    stringMaskOptions: { maskWith: "*", maskOnlyFirstOccurance: false, values: [], maskAll: true, maskSpace: false },
    stringFields: ['address.addressLine1', 'address.addressLine2'],

    // UUID
    uuidMaskOptions: { maskWith: "*", unmaskedStartCharacters: 4, unmaskedEndCharacters: 2 },
    uuidFields: ['uuids.uuid1']

    // JWT
    jwtMaskOptions: { maskWith: '*', maxMaskedCharacters: 512, maskDot: true, maskHeader: true, maskPayload: true, maskSignature: true},
    jwtFields: ['jwt']
};

const maskedJsonOutput2 = MaskData.maskJSON2(jsonInput2, jsonMaskConfig2);
```

--------------------------------

### Mask Phone Number with Default Configuration

Source: https://github.com/sumukha1496/maskdata/blob/master/documentation/mask_phone_number_with_the_default_configuration.md

Masks a phone number using the default configuration. The default options are `maskWith: "*"`, `unmaskedStartDigits: 4`, and `unmaskedEndDigits: 1`.

```javascript
const MaskData = require('./maskdata');

/** Default Options
  maskWith: "*"
  unmaskedStartDigits: 4
  unmaskedEndDigits: 1 
**/
const phoneNumber = "+111234567890";

const maskedPhoneNumber = MaskData.maskPhone(phoneNumber);

//Output: +911********0

```

--------------------------------

### Mask Header and Signature Parts

Source: https://github.com/sumukha1496/maskdata/blob/master/documentation/mask_jwt_token.md

Configures the mask options to mask both the header and signature while keeping the payload and dots visible.

```javascript
const MaskData = require('./maskdata');

const jwtMaskOptions = {
  maskWith: '*',
  maxMaskedCharacters: 512,
  maskDot: false,
  maskHeader: true,
  maskPayload: false,
  maskSignature: true
};

const jwt =
  'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpYXQiOjE1MTYyMzkwMjJ9.tbDepxpstvGdW8TC3G8zg4B6rUYAOvfzdceoH48wgRQ';

/** In this example,
 * Header = eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9
 * Payload = eyJpYXQiOjE1MTYyMzkwMjJ9
 * Signature = tbDepxpstvGdW8TC3G8zg4B6rUYAOvfzdceoH48wgRQ
 */ 
const maskedJwt = MaskData.maskJwt(jwt, jwtMaskOptions);

// Output:
************************************.eyJpYXQiOjE1MTYyMzkwMjJ9.*******************************************
```

--------------------------------

### Default JSON Masking Configurations

Source: https://github.com/sumukha1496/maskdata/blob/master/documentation/mask_email_id_with_the_default_configuration.md

Defines the default configuration object for masking various data types within a JSON object. Specify fields and options for each type to be masked.

```javascript
const MaskData = require('./maskdata');

// Default configs are as below. If specific masking changes are needed, use the corresponding configs for each type of field.
const defaultjsonMask2Configs = {
    cardMaskOptions: defaultCardMaskOptions, // Optional 
    cardFields: [], // List of card fields to be masked

    emailMaskOptions: defaultEmailMask2Options, // Optional 
    emailFields: [], // List of email fields to be masked

    // For passwords, tokens, etc...
    passwordMaskOptions: defaultPasswordMaskOptions, // Optional 
    passwordFields: [], // List of password fields to be masked

    phoneMaskOptions: defaultPhoneMaskOptions, // Optional 
    phoneFields: [], // List of phone fields to be masked

    stringMaskOptions:  defaultStringMaskOptions, // Mandatory if stringFields are given. Otherwise, stringFields won't be masked
    stringFields: [], // List of String fields to be masked

    uuidMaskOptions: defaultUuidMaskOptions, // Optional 
    uuidFields: [], // List of UUID fields to be masked

    jwtMaskOptions: defaultJwtMaskOptions, // Optional 
    jwtFields: [], // List of JWT fields to be masked

    genericStrings: [
      {
        config: defaultStringMaskV2Options,
        fields: []
      }
    ]
};

```

--------------------------------

### Generic String Masking with Custom Options

Source: https://github.com/sumukha1496/maskdata/blob/master/README.md

Masks a generic string using `maskStringV2` with customizable options. Options include `maskWith`, `maxMaskedCharacters`, `fixedOutputLength`, `unmaskedStartCharacters`, and `unmaskedEndCharacters`. `fixedOutputLength` takes precedence over `maxMaskedCharacters`.

```javascript
const MaskData = require('./maskdata');

const defaultStringMaskV2Options = {
  // Character to mask the data
  // default value is '*'
  maskWith: "*",

  // This is to limit the maximun characters in the output.
  // Default value is 256
  maxMaskedCharacters: 256,

  // To fix the length of output irrespective of the length of the input. This comes in handy when the input length < maxMaskedCharacters but we want a fixed output length.
  // Default value is undefined. If this value is set, then maxMaskedCharacters will not be considered and the output length will always be equal to fixedOutputLength characters.
  fixedOutputLength: undefined,

  // To show(not mask) first 'n' characters of the string.
  // Default value is 0. 
  unmaskedStartCharacters: 0,

  // To show(not mask) last 'n' characters of the string.
  // Default value is 0. 
  unmaskedEndCharacters: 0
};

const string1 = "Password1$";

const maskedString = MaskData.maskStringV2(string1, defaultStringMaskV2Options);

//Output: **********
```