# frint [![npm](https://img.shields.io/npm/v/frint.svg)](https://www.npmjs.com/package/frint) > The base of Frint - [Guide](#guide) - [Installation](#installation) - [Terminologies](#terminologies) - [Usage](#usage) - [Creating and registering apps](#creating-and-registering-apps) - [Understanding Providers](#understanding-providers) - [API](#api) - [App](#app) - [createApp](#createapp) - [app](#app-1) --- # Guide ## Installation With [npm](https://www.npmjs.com/): ``` $ npm install --save frint ``` Via [unpkg](https://unpkg.com) CDN: ```html ``` ## Terminologies * `Root App`: The top-most parent App, where other Apps get registered to. * `App`: Apps that register themselves to Root App. * `Provider`: Dependency for your apps. ## Usage Let's import the necessary functions from the library first: ```js const Frint = require('frint'); const { createApp } = Frint; ``` Now we can create our App: ```js const RootApp = createApp({ name: 'MyAppName' }); ``` Instantiate the Root app: ```js const app = new RootApp(); // now you have the Root app's instance // usually we set the root app to `window.app`, // so apps coming in from separate bundles can register themselves window.app = app; ``` ## Creating and registering apps ```js const { createApp } = Frint; const MyApp = createApp({ name: 'MyAppName' }); ``` To register the App in your Root App: ```js window.app.registerApp(MyApp); ``` ## Understanding Providers Providers are dependencies for your Frint application (not to be confused with `npm` packages). They can be set at Root app level, at App level, or even only at Root app level but cascade them to other Apps. ### Direct values For values that are already known: ```js const RootApp = createApp({ name: 'MyAppName', providers: [ { name: 'foo', useValue: 'foo value here' } ] }); const app = new RootApp(); app.get('foo') === 'foo value here'; ``` ### Generated values from factories If you want to get the value from a function (will be called only once during App construction): ```js const RootApp = createApp({ name: 'MyAppName', providers: [ { name: 'bar', useFactory: function () { return 'bar value'; } }, ] }); const app = new RootApp(); app.get('bar') === 'bar value'; ``` ### Classes You can also have classes defined as providers. They will be instantiated when the App is constructed, and then made available to you: ```js class Baz { getValue() { return 'baz value'; } } const RootApp = createApp({ name: 'MyAppName', providers: [ { name: 'baz', useClass: Baz } ] }); const app = new RootApp(); app.get('baz').getValue() === 'baz value'; ``` ### Cascading If you wish to cascade a provider from Root App to other Apps, you can: ```js const RootApp = createApp({ name: 'MyRootApp', providers: [ { name: 'window', useValue: window, // the global `window` object cascade: true, } ] }); const MyApp = createApp({ name: 'MyApp' }); const app = new RootApp(); app.registerApp(MyApp); app.get('window') === window; app.getAppInstance('MyApp').get('window') === window; ``` ### Reserved provider names * `app`: The current App in scope * `rootApp`: Always refers to the top-most App (which is Root) ### Dependencies Providers can also list their dependencies (by their names). ```js class Baz { constructor({ foo, bar, app }) { // I have access to both `foo` and `bar` here. // And I can access the scoped `app` instance too. } } const RootApp = createApp({ name: 'MyRootApp', providers: [ { name: 'foo', useValue: 'foo value' }, { name: 'bar', useFactory: function ({ foo }) { return `In bar, I have foo's value: ${foo}` }, deps: ['foo'] // value's of provider names listed here will be fed as arguments }, { name: 'baz', useClass: Baz, deps: ['foo', 'bar', 'app'] } ], }) ``` ### Scoped When cascading providers from Root to other Apps, it is likely you may want to scope those values by the App they are targeting. It is applicable in only `useFactory` and `useClass` usage, since they generate values. ```js const RootApp = createApp({ name: 'MyRootApp', providers: [ { name: 'theNameOfTheApp', useFactory: function ({ app }) { return app.app.getName(); }, deps: ['app'], cascade: true, scoped: true, } ] }); const MyApp = createApp({ name: 'MyApp' }); const app = new RootApp(); app.registerApp(MyApp); app.get('theNameOfTheApp') === 'MyRootApp'; app.getAppInstance('MyApp').get('theNameOfTheApp') === 'MyApp'; ``` --- # API ## App > App The base App class. ## createApp > createApp(options) ### Arguments 1. `options` (`Object`) * `options.name`: (`String` [required]): Name of your App. * `options.methods`: (`Object` [optional]): Object with the methods your App exposes on the instance level. * `options.initialize`: (`Function` [optional]): Called when App is constructed. * `options.beforeDestroy`: (`Function` [optional]): Called when App is about to be destroyed. * `options.providers`: (`Array` [optional]): Array of provider objects. ### Returns `App`: App class. ## app > const app = new App(); The `App` instance ### app.getOption > app.getOption(key) #### Arguments 1. `key` (`String`) #### Returns `Any`. #### Example `app.getOption('name')` would give you `MyAppName` string. ### app.getName > app.getName() #### Returns `String`: The App's name. ### app.getRootApp > app.getRootApp() #### Returns `App`: Gives you the Root App instance. ### app.getParentApp > app.getParentApp() #### Returns `App`: Gives you the immediate Parent App instance. ### app.getParentApps > app.getParentApps() ### Returns `Array`: Array of parent apps, with immediate parent app as first element and the root app being the last. ### app.getProviders > app.getProviders() Gives you an array of provider definitions as passed while creating the App class. #### Returns `Array`: Array of provider definitions as passed while creating the App class. ### app.getProvider > app.getProvider(name) Gives you the provider's original definition. #### Arguments 1. `name` (`String`): The name of the provider that you want #### Returns `Object`: The provider definition Not to be confused with the computed value of the provider. ### app.get > app.get(name) Gives you the computed value of the provider. #### Arguments 1. `name` (`String`): The name of the provider #### Returns `Any`: The computed value of the provider. ### app.getApps$ > app.getApps$(regionName = null) #### Arguments 1. `regionName` (`String` [optional]): Filter the list of apps by region names if needed #### Returns `Observable`: That emits an array of most recent available Apps. ### app.registerApp > app.registerApp(App, options = {}) Register App class to Root app. #### Arguments 1. `App` (`App`): The App class. 1. `options` (`Object` [optional]) * `name` (`String` [optional]): If the App's name needs to be overridden. * `multi` (`Boolean` [optional]): If the App is a multi-instance app (defaults to `false`) #### Returns `void` ### app.hasAppInstance > app.hasAppInstance(name, region = null, regionKey = null) Check if App instance is available or not. #### Arguments 1. `name` (`String`): The name of the App that you are looking for 1. `region` (`String` [optional]): If you want the App of a specific region 1. `regionKey` (`String` [optional]): If it is a multi-instance App, then the lookup can be scoped by region's keys. #### Returns `Boolean`: A flag indicating whether an App instance whose name matches the provided `name` parameter is available or not ### app.getAppInstance > app.getAppInstance(name, region = null, regionKey = null) Gets the App instance if available. #### Arguments 1. `name` (`String`): The name of the App that you are looking for 1. `region` (`String` [optional]): If you want the App of a specific region 1. `regionKey` (`String` [optional]): If it is a multi-instance App, then the lookup can be scoped by region's keys. #### Returns `App|Boolean`: The app instance, or false if not availble. ### app.getAppOnceAvailable$ > app.getAppOnceAvailable$(name, region = null, regionKey = null) Returns an Observable, which emits with the App's instance once it is available. #### Arguments 1. `name` (`String`): The name of the App that you are looking for 1. `region` (`String` [optional]): If you want the App of a specific region 1. `regionKey` (`String` [optional]): If it is a multi-instance App, then the lookup can be scoped by region's keys. #### Returns `Observable`: Emits the App instance once found, only once. ### app.instantiateApp > app.instantiateApp(name, region = null, regionKey = null) Instantiates the registered App class, (for the targetted region/regionKey if it is a multi-instance App). #### Arguments 1. `name` (`String`): The name of the App that you are looking for 1. `region` (`String` [optional]): If you want the App of a specific region 1. `regionKey` (`String` [optional]): If it is a multi-instance App, then the lookup can be scoped by region's keys. #### Returns `Array`: The updated collection of apps. ### app.destroyApp > app.destroyApp(name, region = null, regionKey = null) Destroys App instance. #### Arguments 1. `name` (`String`): The name of the App that you are looking for 1. `region` (`String` [optional]): If you want the App of a specific region 1. `regionKey` (`String` [optional]): If it is a multi-instance App, then the lookup can be scoped by region's keys. #### Returns `void`.

	Stars	Issues	Version	Updated	Created
@luigi-project/core	803	87	2.11.0	10 days ago	4 years ago
bit	6	0	1.0.20	5 years ago	12 years ago
frint	751	61	5.7.2	6 years ago	8 years ago
oc	1,402	24	0.49.53	19 days ago	9 years ago
piral			1.5.4	7 days ago	5 years ago
qiankun	15,431	380	2.10.16	5 months ago	5 years ago

@luigi-project/core vs bit vs frint vs oc vs piral vs qiankun

Downloads in past1 Month3 Months6 Months1 Year2 Years5 YearsAll time

Stats

Popular Searches

Sick of boring JavaScript newsletters?

Downloads in past