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@angular/platform-browser

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Angular - library for using Angular in a web browser

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/** * @license * Copyright Google LLC All Rights Reserved. * * Use of this source code is governed by an MIT-style license that can be * found in the LICENSE file at https://angular.io/license */ import { DOCUMENT } from '@angular/common'; import { APP_ID, Injectable, NgModule } from '@angular/core'; import * as i0 from "@angular/core"; export function escapeHtml(text) { const escapedText = { '&': '&a;', '"': '&q;', '\'': '&s;', '<': '&l;', '>': '&g;', }; return text.replace(/[&"'<>]/g, s => escapedText[s]); } export function unescapeHtml(text) { const unescapedText = { '&a;': '&', '&q;': '"', '&s;': '\'', '&l;': '<', '&g;': '>', }; return text.replace(/&[^;]+;/g, s => unescapedText[s]); } /** * Create a `StateKey<T>` that can be used to store value of type T with `TransferState`. * * Example: * * ``` * const COUNTER_KEY = makeStateKey<number>('counter'); * let value = 10; * * transferState.set(COUNTER_KEY, value); * ``` * * @publicApi */ export function makeStateKey(key) { return key; } /** * A key value store that is transferred from the application on the server side to the application * on the client side. * * `TransferState` will be available as an injectable token. To use it import * `ServerTransferStateModule` on the server and `BrowserTransferStateModule` on the client. * * The values in the store are serialized/deserialized using JSON.stringify/JSON.parse. So only * boolean, number, string, null and non-class objects will be serialized and deserialized in a * non-lossy manner. * * @publicApi */ export class TransferState { constructor() { this.store = {}; this.onSerializeCallbacks = {}; } /** @internal */ static init(initState) { const transferState = new TransferState(); transferState.store = initState; return transferState; } /** * Get the value corresponding to a key. Return `defaultValue` if key is not found. */ get(key, defaultValue) { return this.store[key] !== undefined ? this.store[key] : defaultValue; } /** * Set the value corresponding to a key. */ set(key, value) { this.store[key] = value; } /** * Remove a key from the store. */ remove(key) { delete this.store[key]; } /** * Test whether a key exists in the store. */ hasKey(key) { return this.store.hasOwnProperty(key); } /** * Register a callback to provide the value for a key when `toJson` is called. */ onSerialize(key, callback) { this.onSerializeCallbacks[key] = callback; } /** * Serialize the current state of the store to JSON. */ toJson() { // Call the onSerialize callbacks and put those values into the store. for (const key in this.onSerializeCallbacks) { if (this.onSerializeCallbacks.hasOwnProperty(key)) { try { this.store[key] = this.onSerializeCallbacks[key](); } catch (e) { console.warn('Exception in onSerialize callback: ', e); } } } return JSON.stringify(this.store); } } TransferState.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "13.0.3", ngImport: i0, type: TransferState, deps: [], target: i0.ɵɵFactoryTarget.Injectable }); TransferState.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: "12.0.0", version: "13.0.3", ngImport: i0, type: TransferState }); i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "13.0.3", ngImport: i0, type: TransferState, decorators: [{ type: Injectable }] }); export function initTransferState(doc, appId) { // Locate the script tag with the JSON data transferred from the server. // The id of the script tag is set to the Angular appId + 'state'. const script = doc.getElementById(appId + '-state'); let initialState = {}; if (script && script.textContent) { try { // Avoid using any here as it triggers lint errors in google3 (any is not allowed). initialState = JSON.parse(unescapeHtml(script.textContent)); } catch (e) { console.warn('Exception while restoring TransferState for app ' + appId, e); } } return TransferState.init(initialState); } /** * NgModule to install on the client side while using the `TransferState` to transfer state from * server to client. * * @publicApi */ export class BrowserTransferStateModule { } BrowserTransferStateModule.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "13.0.3", ngImport: i0, type: BrowserTransferStateModule, deps: [], target: i0.ɵɵFactoryTarget.NgModule }); BrowserTransferStateModule.ɵmod = i0.ɵɵngDeclareNgModule({ minVersion: "12.0.0", version: "13.0.3", ngImport: i0, type: BrowserTransferStateModule }); BrowserTransferStateModule.ɵinj = i0.ɵɵngDeclareInjector({ minVersion: "12.0.0", version: "13.0.3", ngImport: i0, type: BrowserTransferStateModule, providers: [{ provide: TransferState, useFactory: initTransferState, deps: [DOCUMENT, APP_ID] }] }); i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "13.0.3", ngImport: i0, type: BrowserTransferStateModule, decorators: [{ type: NgModule, args: [{ providers: [{ provide: TransferState, useFactory: initTransferState, deps: [DOCUMENT, APP_ID] }], }] }] }); //# 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* @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {DOCUMENT} from '@angular/common';\nimport {APP_ID, Injectable, NgModule} from '@angular/core';\n\nexport function escapeHtml(text: string): string {\n  const escapedText: {[k: string]: string} = {\n    '&': '&a;',\n    '\"': '&q;',\n    '\\'': '&s;',\n    '<': '&l;',\n    '>': '&g;',\n  };\n  return text.replace(/[&\"'<>]/g, s => escapedText[s]);\n}\n\nexport function unescapeHtml(text: string): string {\n  const unescapedText: {[k: string]: string} = {\n    '&a;': '&',\n    '&q;': '\"',\n    '&s;': '\\'',\n    '&l;': '<',\n    '&g;': '>',\n  };\n  return text.replace(/&[^;]+;/g, s => unescapedText[s]);\n}\n\n/**\n * A type-safe key to use with `TransferState`.\n *\n * Example:\n *\n * ```\n * const COUNTER_KEY = makeStateKey<number>('counter');\n * let value = 10;\n *\n * transferState.set(COUNTER_KEY, value);\n * ```\n *\n * @publicApi\n */\nexport type StateKey<T> = string&{__not_a_string: never};\n\n/**\n * Create a `StateKey<T>` that can be used to store value of type T with `TransferState`.\n *\n * Example:\n *\n * ```\n * const COUNTER_KEY = makeStateKey<number>('counter');\n * let value = 10;\n *\n * transferState.set(COUNTER_KEY, value);\n * ```\n *\n * @publicApi\n */\nexport function makeStateKey<T = void>(key: string): StateKey<T> {\n  return key as StateKey<T>;\n}\n\n/**\n * A key value store that is transferred from the application on the server side to the application\n * on the client side.\n *\n * `TransferState` will be available as an injectable token. To use it import\n * `ServerTransferStateModule` on the server and `BrowserTransferStateModule` on the client.\n *\n * The values in the store are serialized/deserialized using JSON.stringify/JSON.parse. So only\n * boolean, number, string, null and non-class objects will be serialized and deserialized in a\n * non-lossy manner.\n *\n * @publicApi\n */\n@Injectable()\nexport class TransferState {\n  private store: {[k: string]: {}|undefined} = {};\n  private onSerializeCallbacks: {[k: string]: () => {} | undefined} = {};\n\n  /** @internal */\n  static init(initState: {}) {\n    const transferState = new TransferState();\n    transferState.store = initState;\n    return transferState;\n  }\n\n  /**\n   * Get the value corresponding to a key. Return `defaultValue` if key is not found.\n   */\n  get<T>(key: StateKey<T>, defaultValue: T): T {\n    return this.store[key] !== undefined ? this.store[key] as T : defaultValue;\n  }\n\n  /**\n   * Set the value corresponding to a key.\n   */\n  set<T>(key: StateKey<T>, value: T): void {\n    this.store[key] = value;\n  }\n\n  /**\n   * Remove a key from the store.\n   */\n  remove<T>(key: StateKey<T>): void {\n    delete this.store[key];\n  }\n\n  /**\n   * Test whether a key exists in the store.\n   */\n  hasKey<T>(key: StateKey<T>) {\n    return this.store.hasOwnProperty(key);\n  }\n\n  /**\n   * Register a callback to provide the value for a key when `toJson` is called.\n   */\n  onSerialize<T>(key: StateKey<T>, callback: () => T): void {\n    this.onSerializeCallbacks[key] = callback;\n  }\n\n  /**\n   * Serialize the current state of the store to JSON.\n   */\n  toJson(): string {\n    // Call the onSerialize callbacks and put those values into the store.\n    for (const key in this.onSerializeCallbacks) {\n      if (this.onSerializeCallbacks.hasOwnProperty(key)) {\n        try {\n          this.store[key] = this.onSerializeCallbacks[key]();\n        } catch (e) {\n          console.warn('Exception in onSerialize callback: ', e);\n        }\n      }\n    }\n    return JSON.stringify(this.store);\n  }\n}\n\nexport function initTransferState(doc: Document, appId: string) {\n  // Locate the script tag with the JSON data transferred from the server.\n  // The id of the script tag is set to the Angular appId + 'state'.\n  const script = doc.getElementById(appId + '-state');\n  let initialState = {};\n  if (script && script.textContent) {\n    try {\n      // Avoid using any here as it triggers lint errors in google3 (any is not allowed).\n      initialState = JSON.parse(unescapeHtml(script.textContent)) as {};\n    } catch (e) {\n      console.warn('Exception while restoring TransferState for app ' + appId, e);\n    }\n  }\n  return TransferState.init(initialState);\n}\n\n/**\n * NgModule to install on the client side while using the `TransferState` to transfer state from\n * server to client.\n *\n * @publicApi\n */\n@NgModule({\n  providers: [{provide: TransferState, useFactory: initTransferState, deps: [DOCUMENT, APP_ID]}],\n})\nexport class BrowserTransferStateModule {\n}\n"]}