"Fossies" - the Fresh Open Source Software Archive

Member "node-v19.8.1-win-x64/node_modules/npm/node_modules/abort-controller/dist/abort-controller.mjs" (16 Feb 2023, 3429 Bytes) of package /windows/www/node-v19.8.1-win-x64.zip:

    1 /**
    2  * @author Toru Nagashima <https://github.com/mysticatea>
    3  * See LICENSE file in root directory for full license.
    4  */
    5 import { EventTarget, defineEventAttribute } from 'event-target-shim';
    6 
    7 /**
    8  * The signal class.
    9  * @see https://dom.spec.whatwg.org/#abortsignal
   10  */
   11 class AbortSignal extends EventTarget {
   12     /**
   13      * AbortSignal cannot be constructed directly.
   14      */
   15     constructor() {
   16         super();
   17         throw new TypeError("AbortSignal cannot be constructed directly");
   18     }
   19     /**
   20      * Returns `true` if this `AbortSignal`'s `AbortController` has signaled to abort, and `false` otherwise.
   21      */
   22     get aborted() {
   23         const aborted = abortedFlags.get(this);
   24         if (typeof aborted !== "boolean") {
   25             throw new TypeError(`Expected 'this' to be an 'AbortSignal' object, but got ${this === null ? "null" : typeof this}`);
   26         }
   27         return aborted;
   28     }
   29 }
   30 defineEventAttribute(AbortSignal.prototype, "abort");
   31 /**
   32  * Create an AbortSignal object.
   33  */
   34 function createAbortSignal() {
   35     const signal = Object.create(AbortSignal.prototype);
   36     EventTarget.call(signal);
   37     abortedFlags.set(signal, false);
   38     return signal;
   39 }
   40 /**
   41  * Abort a given signal.
   42  */
   43 function abortSignal(signal) {
   44     if (abortedFlags.get(signal) !== false) {
   45         return;
   46     }
   47     abortedFlags.set(signal, true);
   48     signal.dispatchEvent({ type: "abort" });
   49 }
   50 /**
   51  * Aborted flag for each instances.
   52  */
   53 const abortedFlags = new WeakMap();
   54 // Properties should be enumerable.
   55 Object.defineProperties(AbortSignal.prototype, {
   56     aborted: { enumerable: true },
   57 });
   58 // `toString()` should return `"[object AbortSignal]"`
   59 if (typeof Symbol === "function" && typeof Symbol.toStringTag === "symbol") {
   60     Object.defineProperty(AbortSignal.prototype, Symbol.toStringTag, {
   61         configurable: true,
   62         value: "AbortSignal",
   63     });
   64 }
   65 
   66 /**
   67  * The AbortController.
   68  * @see https://dom.spec.whatwg.org/#abortcontroller
   69  */
   70 class AbortController {
   71     /**
   72      * Initialize this controller.
   73      */
   74     constructor() {
   75         signals.set(this, createAbortSignal());
   76     }
   77     /**
   78      * Returns the `AbortSignal` object associated with this object.
   79      */
   80     get signal() {
   81         return getSignal(this);
   82     }
   83     /**
   84      * Abort and signal to any observers that the associated activity is to be aborted.
   85      */
   86     abort() {
   87         abortSignal(getSignal(this));
   88     }
   89 }
   90 /**
   91  * Associated signals.
   92  */
   93 const signals = new WeakMap();
   94 /**
   95  * Get the associated signal of a given controller.
   96  */
   97 function getSignal(controller) {
   98     const signal = signals.get(controller);
   99     if (signal == null) {
  100         throw new TypeError(`Expected 'this' to be an 'AbortController' object, but got ${controller === null ? "null" : typeof controller}`);
  101     }
  102     return signal;
  103 }
  104 // Properties should be enumerable.
  105 Object.defineProperties(AbortController.prototype, {
  106     signal: { enumerable: true },
  107     abort: { enumerable: true },
  108 });
  109 if (typeof Symbol === "function" && typeof Symbol.toStringTag === "symbol") {
  110     Object.defineProperty(AbortController.prototype, Symbol.toStringTag, {
  111         configurable: true,
  112         value: "AbortController",
  113     });
  114 }
  115 
  116 export default AbortController;
  117 export { AbortController, AbortSignal };
  118 //# sourceMappingURL=abort-controller.mjs.map