conf

  • Version 14.0.0
  • Published
  • 49.2 kB
  • 9 dependencies
  • MIT license

Install

npm i conf
yarn add conf
pnpm add conf

Overview

Simple config handling for your app or module

Index

Classes

class Conf

class Conf<T extends Record<string, any> = Record<string, unknown>>
implements Iterable<[keyof T, T[keyof T]]> {}

    constructor

    constructor(partialOptions?: Readonly<Partial<Options<T>>>);

      property events

      readonly events: EventTarget;

        property path

        readonly path: string;

          property size

          readonly size: number;

            property store

            store: Record<string, any>;
            • Get all the config as an object or replace the current config with an object.

              Example 1

              ``` console.log(config.store); //=> {name: 'John', age: 30} ```

              Example 2

              ``` config.store = { hello: 'world' }; ```

            method [Symbol.iterator]

            [Symbol.iterator]: () => IterableIterator<[keyof T, T[keyof T]]>;

              method clear

              clear: () => void;
              • Delete all items.

                This resets known items to their default values, if defined by the defaults or schema option.

              method delete

              delete: {
              <Key extends keyof T>(key: Key): void;
              <Key extends DotNotationKeyOf<T>>(key: Key): void;
              };
              • Delete an item.

                Parameter key

                The key of the item to delete.

              method get

              get: {
              <Key extends keyof T>(key: Key): T[Key];
              <Key extends keyof T>(
              key: Key,
              defaultValue: Required<T>[Key]
              ): Required<T>[Key];
              <Key extends DotNotationKeyOf<T>>(key: Key): DotNotationValueOf<T, Key>;
              <Key extends DotNotationKeyOf<T>>(
              key: Key,
              defaultValue: NonNullable<DotNotationValueOf<T, Key>>
              ): NonNullable<DotNotationValueOf<T, Key>>;
              <Key extends string, Value = unknown>(
              key: Exclude<Key, DotNotationKeyOf<T>>,
              defaultValue?: Value
              ): Value;
              };
              • Get an item.

                Parameter key

                The key of the item to get.

                Parameter defaultValue

                The default value if the item does not exist.

                Tip: To get all items, see .store.

              method has

              has: {
              <Key extends keyof T>(key: Key): boolean;
              <Key extends DotNotationKeyOf<T>>(key: Key): boolean;
              };
              • Check if an item exists.

                Parameter key

                The key of the item to check.

              method onDidAnyChange

              onDidAnyChange: (callback: OnDidAnyChangeCallback<T>) => Unsubscribe;
              • Watches the whole config object, calling callback on any changes.

                Parameter callback

                A callback function that is called on any changes. When a key is first set oldValue will be undefined, and when a key is deleted newValue will be undefined.

                Returns

                A function, that when called, will unsubscribe.

              method onDidChange

              onDidChange: {
              <Key extends keyof T>(
              key: Key,
              callback: OnDidChangeCallback<T[Key]>
              ): Unsubscribe;
              <Key extends DotNotationKeyOf<T>>(
              key: Key,
              callback: OnDidChangeCallback<DotNotationValueOf<T, Key>>
              ): Unsubscribe;
              };
              • Watches the given key, calling callback on any changes.

                Parameter key

                The key to watch.

                Parameter callback

                A callback function that is called on any changes. When a key is first set oldValue will be undefined, and when a key is deleted newValue will be undefined.

                Returns

                A function, that when called, will unsubscribe.

              method reset

              reset: <Key extends keyof T>(...keys: Key[]) => void;
              • Reset items to their default values, as defined by the defaults or schema option.

                Parameter keys

                The keys of the items to reset.

                See Also

                • clear() to reset all items.

              method set

              set: {
              <Key extends keyof T>(key: Key, value?: T[Key]): void;
              <Key extends DotNotationKeyOf<T>>(
              key: Key,
              Value?: DotNotationValueOf<T, Key>
              ): void;
              (key: string, value: unknown): void;
              (object: PartialObjectDeep<T>): void;
              };
              • Set an item or multiple items at once.

                Parameter

                {key|object} - You can use [dot-notation](https://github.com/sindresorhus/dot-prop) in a key to access nested properties. Or a hashmap of items to set at once.

                Parameter value

                Must be JSON serializable. Trying to set the type undefined, function, or symbol will result in a TypeError.

              Type Aliases

              type Options

              type Options<T extends Record<string, any>> = {
              /**
              Config used if there are no existing config.
              **Note:** The values in `defaults` will overwrite the `default` key in the `schema` option.
              */
              defaults?: Readonly<T>;
              /**
              [JSON Schema](https://json-schema.org) to validate your config data.
              This will be the [`properties`](https://json-schema.org/understanding-json-schema/reference/object.html#properties) object of the JSON schema. That is, define `schema` as an object where each key is the name of your data's property and each value is a JSON schema used to validate that property.
              @example
              ```
              import Conf from 'conf';
              const schema = {
              foo: {
              type: 'number',
              maximum: 100,
              minimum: 1,
              default: 50
              },
              bar: {
              type: 'string',
              format: 'url'
              }
              };
              const config = new Conf({
              projectName: 'foo',
              schema
              });
              console.log(config.get('foo'));
              //=> 50
              config.set('foo', '1');
              // [Error: Config schema violation: `foo` should be number]
              ```
              **Note:** The `default` value will be overwritten by the `defaults` option if set.
              */
              schema?: Schema<T>;
              /**
              Top-level properties for the schema, excluding `properties` field.
              @example
              ```
              import Conf from 'conf';
              const store = new Conf({
              projectName: 'foo',
              schema: {},
              rootSchema: {
              additionalProperties: false
              }
              });
              ```
              */
              rootSchema?: Omit<TypedJSONSchema, 'properties'>;
              /**
              [Options passed to AJV](https://ajv.js.org/options.html).
              Under the hood, the JSON Schema validator [ajv](https://ajv.js.org/json-schema.html) is used to validate your config. We use [JSON Schema draft-2020-12](https://json-schema.org/draft/2020-12/release-notes) and support all validation keywords and formats.
              **Note:** By default, `allErrors` and `useDefaults` are both set to `true`, but can be overridden.
              @example
              ```
              import Conf from 'conf';
              const store = new Conf({
              projectName: 'foo',
              schema: {},
              rootSchema: {
              additionalProperties: false
              },
              ajvOptions: {
              removeAdditional: true
              }
              });
              ```
              */
              ajvOptions?: AjvOptions;
              /**
              Name of the config file (without extension).
              Useful if you need multiple config files for your app or module. For example, different config files between two major versions.
              @default 'config'
              */
              configName?: string;
              /**
              __Required unless you specify the `cwd` option.__
              You can fetch the `name` field from package.json.
              */
              projectName?: string;
              /**
              __Required if you specify the `migration` option.__
              You can fetch the `version` field from package.json.
              */
              projectVersion?: string;
              /**
              You can use migrations to perform operations to the store whenever a version is changed.
              The `migrations` object should consist of a key-value pair of `'version': handler`. The `version` can also be a [semver range](https://github.com/npm/node-semver#ranges).
              Note: The version the migrations use refers to the __project version__ by default. If you want to change this behavior, specify the `projectVersion` option.
              @example
              ```
              import Conf from 'conf';
              const store = new Conf({
              projectName: 'foo',
              projectVersion: …,
              migrations: {
              '0.0.1': store => {
              store.set('debugPhase', true);
              },
              '1.0.0': store => {
              store.delete('debugPhase');
              store.set('phase', '1.0.0');
              },
              '1.0.2': store => {
              store.set('phase', '1.0.2');
              },
              '>=2.0.0': store => {
              store.set('phase', '>=2.0.0');
              }
              }
              });
              ```
              */
              migrations?: Migrations<T>;
              /**
              The given callback function will be called before each migration step.
              This can be useful for logging purposes, preparing migration data, etc.
              */
              beforeEachMigration?: BeforeEachMigrationCallback<T>;
              /**
              __You most likely don't need this. Please don't use it unless you really have to.__
              The only use-case I can think of is having the config located in the app directory or on some external storage. Default: System default user [config directory](https://github.com/sindresorhus/env-paths#pathsconfig).
              */
              cwd?: string;
              /**
              Note that this is __not intended for security purposes__, since the encryption key would be easily found inside a plain-text Node.js app.
              Its main use is for obscurity. If a user looks through the config directory and finds the config file, since it's just a JSON file, they may be tempted to modify it. By providing an encryption key, the file will be obfuscated, which should hopefully deter any users from doing so.
              It also has the added bonus of ensuring the config file's integrity. If the file is changed in any way, the decryption will not work, in which case the store will just reset back to its default state.
              When specified, the store will be encrypted using the [`aes-256-cbc`](https://en.wikipedia.org/wiki/Block_cipher_mode_of_operation) encryption algorithm.
              */
              encryptionKey?: string | Uint8Array | NodeJS.TypedArray | DataView;
              /**
              Extension of the config file.
              You would usually not need this, but could be useful if you want to interact with a file with a custom file extension that can be associated with your app. These might be simple save/export/preference files that are intended to be shareable or saved outside of the app.
              @default 'json'
              */
              fileExtension?: string;
              /**
              The config is cleared if reading the config file causes a `SyntaxError`. This is a good behavior for unimportant data, as the config file is not intended to be hand-edited, so it usually means the config is corrupt and there's nothing the user can do about it anyway. However, if you let the user edit the config file directly, mistakes might happen and it could be more useful to throw an error when the config is invalid instead of clearing.
              @default false
              */
              clearInvalidConfig?: boolean;
              /**
              Function to serialize the config object to a UTF-8 string when writing the config file.
              You would usually not need this, but it could be useful if you want to use a format other than JSON.
              @default value => JSON.stringify(value, null, '\t')
              */
              readonly serialize?: Serialize<T>;
              /**
              Function to deserialize the config object from a UTF-8 string when reading the config file.
              You would usually not need this, but it could be useful if you want to use a format other than JSON.
              @default JSON.parse
              */
              readonly deserialize?: Deserialize<T>;
              /**
              __You most likely don't need this. Please don't use it unless you really have to.__
              Suffix appended to `projectName` during config file creation to avoid name conflicts with native apps.
              You can pass an empty string to remove the suffix.
              For example, on macOS, the config file will be stored in the `~/Library/Preferences/foo-nodejs` directory, where `foo` is the `projectName`.
              @default 'nodejs'
              */
              readonly projectSuffix?: string;
              /**
              Access nested properties by dot notation.
              @default true
              @example
              ```
              const config = new Conf({projectName: 'foo'});
              config.set({
              foo: {
              bar: {
              foobar: '🦄'
              }
              }
              });
              console.log(config.get('foo.bar.foobar'));
              //=> '🦄'
              ```
              Alternatively, you can set this option to `false` so the whole string would be treated as one key.
              @example
              ```
              const config = new Conf({
              projectName: 'foo',
              accessPropertiesByDotNotation: false
              });
              config.set({
              `foo.bar.foobar`: '🦄'
              });
              console.log(config.get('foo.bar.foobar'));
              //=> '🦄'
              ```
              */
              readonly accessPropertiesByDotNotation?: boolean;
              /**
              Watch for any changes in the config file and call the callback for `onDidChange` or `onDidAnyChange` if set. This is useful if there are multiple processes changing the same config file.
              @default false
              */
              readonly watch?: boolean;
              /**
              The [mode](https://en.wikipedia.org/wiki/File-system_permissions#Numeric_notation) that will be used for the config file.
              You would usually not need this, but it could be useful if you want to restrict the permissions of the config file. Setting a permission such as `0o600` would result in a config file that can only be accessed by the user running the program.
              Note that setting restrictive permissions can cause problems if different users need to read the file. A common problem is a user running your tool with and without `sudo` and then not being able to access the config the second time.
              @default 0o666
              */
              readonly configFileMode?: number;
              };

                type Schema

                type Schema<T> = {
                [Property in keyof T]: ValueSchema;
                };

                  Package Files (2)

                  Dependencies (9)

                  Dev Dependencies (13)

                  Peer Dependencies (0)

                  No peer dependencies.

                  Badge

                  To add a badge like this onejsDocs.io badgeto your package's README, use the codes available below.

                  You may also use Shields.io to create a custom badge linking to https://www.jsdocs.io/package/conf.

                  • Markdown
                    [![jsDocs.io](https://img.shields.io/badge/jsDocs.io-reference-blue)](https://www.jsdocs.io/package/conf)
                  • HTML
                    <a href="https://www.jsdocs.io/package/conf"><img src="https://img.shields.io/badge/jsDocs.io-reference-blue" alt="jsDocs.io"></a>