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    @shuaninfo/random
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    5.1.1 • Public • Published

    random

    Generate a cryptographically strong random string

    Can be useful for creating an identifier, slug, salt, PIN code, fixture, etc.

    Install

    $ npm install @shuaninfo/random -S
    #
    $ yarn add @shuaninfo/random

    Usage

    // esm
    import random from '@shuaninfo/random';
    // cjs
    // const random = require('@shuaninfo/random').default
    
    random({length: 10});
    //=> '2cf05d94db'
    
    random({length: 10, type: 'base64'});
    //=> 'YMiMbaQl6I'
    
    random({length: 10, type: 'url-safe'});
    //=> 'YN-tqc8pOw'
    
    random({length: 10, type: 'numeric'});
    //=> '8314659141'
    
    random({length: 6, type: 'distinguishable'});
    //=> 'CDEHKM'
    
    random({length: 10, type: 'ascii-printable'});
    //=> '`#Rt8$IK>B'
    
    random({length: 10, type: 'alphanumeric'});
    //=> 'DMuKL8YtE7'
    
    random({length: 10, characters: 'abc'});
    //=> 'abaaccabac'

    API

    random(options)

    Returns a randomized string. Hex by default.

    random.async(options)

    Returns a promise which resolves to a randomized string. Hex by default.

    For most use-cases, there's really no good reason to use this async version. From the Node.js docs:

    The crypto.randomBytes() method will not complete until there is sufficient entropy available. This should normally never take longer than a few milliseconds. The only time when generating the random bytes may conceivably block for a longer period of time is right after boot, when the whole system is still low on entropy.

    In general, anything async comes with some overhead on it's own.

    options

    Type: object

    length

    Required
    Type: number

    Length of the returned string.

    type

    Type: string Default: 'hex' Values: 'hex' | 'base64' | 'url-safe' | 'numeric' | 'distinguishable' | 'ascii-printable' | 'alphanumeric'

    Use only characters from a predefined set of allowed characters.

    Cannot be set at the same time as the characters option.

    The distinguishable set contains only uppercase characters that are not easily confused: CDEHKMPRTUWXY012458. It can be useful if you need to print out a short string that you'd like users to read and type back in with minimal errors. For example, reading a code off of a screen that needs to be typed into a phone to connect two devices.

    The ascii-printable set contains all printable ASCII characters: !"#$%&\'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~ Useful for generating passwords where all possible ASCII characters should be used.

    The alphanumeric set contains uppercase letters, lowercase letters, and digits: ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789. Useful for generating nonce values.

    characters

    Type: string
    Minimum length: 1
    Maximum length: 65536

    Use only characters from a custom set of allowed characters.

    Cannot be set at the same time as the type option.

    Related

    Install

    npm i @shuaninfo/random

    DownloadsWeekly Downloads

    668

    Version

    5.1.1

    License

    MIT

    Unpacked Size

    39.8 kB

    Total Files

    18

    Last publish

    Collaborators

    • shuaninfo