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tessl/npm-capacitor--core

Cross-platform runtime library that enables web applications to run natively on iOS, Android, Web, and other platforms with unified JavaScript APIs

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Capacitor Core

Capacitor Core is the foundational runtime library for Capacitor, a cross-platform framework that enables web applications to run natively on iOS, Android, Web, and other platforms. It provides a unified JavaScript API for accessing native device features and manages the bridge between web and native code implementations.

Package Information

  • Package Name: @capacitor/core
  • Package Type: npm
  • Language: TypeScript
  • Installation: npm install @capacitor/core

Core Imports

import { Capacitor, registerPlugin } from "@capacitor/core";
import { WebPlugin } from "@capacitor/core";
import { CapacitorCookies, CapacitorHttp, WebView } from "@capacitor/core";

For CommonJS:

const { Capacitor, registerPlugin, WebPlugin } = require("@capacitor/core");

Basic Usage

import { Capacitor, registerPlugin } from "@capacitor/core";

// Check platform
const platform = Capacitor.getPlatform(); // 'android', 'ios', or 'web'
const isNative = Capacitor.isNativePlatform(); // true for native platforms

// Check plugin availability
const available = Capacitor.isPluginAvailable('Camera');

// Register a custom plugin
interface MyPlugin {
  echo(options: { value: string }): Promise<{ value: string }>;
}

const MyPlugin = registerPlugin<MyPlugin>('MyPlugin', {
  web: () => import('./web/my-plugin').then(m => new m.MyPluginWeb()),
});

// Use built-in HTTP client
import { CapacitorHttp } from "@capacitor/core";

const response = await CapacitorHttp.get({
  url: 'https://api.example.com/data',
  headers: {
    'Content-Type': 'application/json',
  },
});

Architecture

Capacitor Core is built around several key components:

  • Global Capacitor Object: Central runtime providing platform detection and plugin management
  • Plugin System: Architecture for registering and managing platform-specific implementations
  • WebPlugin Base Class: Foundation for implementing web-based plugin functionality
  • Built-in Core Plugins: Essential plugins for HTTP, cookies, and WebView management
  • Native Bridge: Communication layer between JavaScript and native platform code
  • Type System: Complete TypeScript definitions for type-safe development

Capabilities

Platform Runtime

Core platform detection, plugin management, and runtime functionality. Essential for all Capacitor applications.

interface CapacitorGlobal {
  getPlatform(): string;
  isNativePlatform(): boolean;
  isPluginAvailable(name: string): boolean;
  registerPlugin: RegisterPlugin;
  convertFileSrc(filePath: string): string;
  Exception: typeof CapacitorException;
  DEBUG?: boolean;
  isLoggingEnabled?: boolean;
}

type RegisterPlugin = <T>(
  pluginName: string, 
  implementations?: PluginImplementations
) => T;

Platform Runtime

Plugin Development

Base classes and utilities for developing custom Capacitor plugins with cross-platform support.

interface Plugin {
  addListener(eventName: string, listenerFunc: Function): Promise<PluginListenerHandle>;
  removeAllListeners(): Promise<void>;
}

class WebPlugin implements Plugin {
  addListener(eventName: string, listenerFunc: ListenerCallback): Promise<PluginListenerHandle>;
  removeAllListeners(): Promise<void>;
  protected notifyListeners(eventName: string, data: any, retainUntilConsumed?: boolean): void;
  protected unimplemented(msg?: string): CapacitorException;
  protected unavailable(msg?: string): CapacitorException;
}

Plugin Development

HTTP Client

Native HTTP client with web fallback for making network requests with advanced features like custom headers, timeouts, and response type handling.

interface CapacitorHttpPlugin {
  request(options: HttpOptions): Promise<HttpResponse>;
  get(options: HttpOptions): Promise<HttpResponse>;
  post(options: HttpOptions): Promise<HttpResponse>;
  put(options: HttpOptions): Promise<HttpResponse>;
  patch(options: HttpOptions): Promise<HttpResponse>;
  delete(options: HttpOptions): Promise<HttpResponse>;
}

interface HttpOptions {
  url: string;
  method?: string;
  data?: any;
  headers?: HttpHeaders;
  params?: HttpParams;
  readTimeout?: number;
  connectTimeout?: number;
  responseType?: HttpResponseType;
}

interface HttpResponse {
  data: any;
  status: number;
  headers: HttpHeaders;
  url: string;
}

function buildRequestInit(options: HttpOptions, extra?: RequestInit): RequestInit;

HTTP Client

Cookie Management

Cross-platform cookie management with native implementations and web fallbacks.

interface CapacitorCookiesPlugin {
  getCookies(options?: GetCookieOptions): Promise<HttpCookieMap>;
  setCookie(options: SetCookieOptions): Promise<void>;
  deleteCookie(options: DeleteCookieOptions): Promise<void>;
  clearCookies(options: ClearCookieOptions): Promise<void>;
  clearAllCookies(): Promise<void>;
}

type SetCookieOptions = {
  key: string;
  value: string;
  url?: string;
  path?: string;
  expires?: string;
};

Cookie Management

WebView Management

WebView configuration and path management for hybrid applications.

interface WebViewPlugin extends Plugin {
  setServerAssetPath(options: WebViewPath): Promise<void>;
  setServerBasePath(options: WebViewPath): Promise<void>;
  getServerBasePath(): Promise<WebViewPath>;
  persistServerBasePath(): Promise<void>;
}

interface WebViewPath {
  path: string;
}

WebView Management

Core Types

type PermissionState = 'prompt' | 'prompt-with-rationale' | 'granted' | 'denied';

interface PluginListenerHandle {
  remove(): Promise<void>;
}

type PluginCallback = (data: PluginResultData, error?: PluginResultError) => void;

type ListenerCallback = (err: any, ...args: any[]) => void;

interface PluginResultData {
  [key: string]: any;
}

interface PluginResultError {
  message: string;
}

interface PluginImplementations {
  [platform: string]: (() => Promise<any>) | any;
}

enum ExceptionCode {
  Unimplemented = 'UNIMPLEMENTED',
  Unavailable = 'UNAVAILABLE',
}

class CapacitorException extends Error {
  constructor(
    readonly message: string,
    readonly code?: ExceptionCode,
    readonly data?: ExceptionData,
  );
}

interface ExceptionData {
  [key: string]: any;
}

Install with Tessl CLI

npx tessl i tessl/npm-capacitor--core
Workspace
tessl
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Created
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npmpkg:npm/@capacitor/core@7.4.x
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