web-streams-polyfill/dist/ponyfill.js

Web Streams, based on the WHATWG spec reference implementation

/**
 * @license
 * web-streams-polyfill v4.3.0
 * Copyright 2026 Mattias Buelens, Diwank Singh Tomer and other contributors.
 * This code is released under the MIT license.
 * SPDX-License-Identifier: MIT
 */
!function(e,t){"object"==typeof exports&&"undefined"!=typeof module?t(exports):"function"==typeof define&&define.amd?define(["exports"],t):t((e="undefined"!=typeof globalThis?globalThis:e||self).WebStreamsPolyfill={})}(this,function(e){"use strict";function t(){}function r(e){return"object"==typeof e&&null!==e||"function"==typeof e}const o=t;function n(e,t){try{Object.defineProperty(e,"name",{value:t,configurable:!0})}catch(e){}}const i=Promise,a=Promise.resolve.bind(i),s=Promise.prototype.then,l=Promise.reject.bind(i),u=a;function c(e){return new i(e)}function d(e){return c(t=>t(e))}function f(e){return l(e)}function b(e,t,r){return s.call(e,t,r)}function h(e,t,r){b(b(e,t,r),void 0,o)}function _(e,t){h(e,t)}function m(e,t){h(e,void 0,t)}function p(e,t,r){return b(e,t,r)}function y(e){b(e,void 0,o)}let S=e=>{if("function"==typeof queueMicrotask)S=queueMicrotask;else{const e=d(void 0);S=t=>b(e,t)}return S(e)};function g(e,t,r){if("function"!=typeof e)throw new TypeError("Argument is not 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R=Symbol("[[AbortSteps]]"),T=Symbol("[[ErrorSteps]]"),P=Symbol("[[CancelSteps]]"),C=Symbol("[[PullSteps]]"),q=Symbol("[[CanPullSyncSteps]]"),E=Symbol("[[ReleaseSteps]]");function W(e,t){e._ownerReadableStream=t,t._reader=e,"readable"===t._state?k(e):"closed"===t._state?function(e){k(e),D(e)}(e):A(e,t._storedError)}function B(e,t){return Yr(e._ownerReadableStream,t)}function O(e){const t=e._ownerReadableStream;"readable"===t._state?z(e,new TypeError("Reader was released and can no longer be used to monitor the stream's closedness")):function(e,t){A(e,t)}(e,new TypeError("Reader was released and can no longer be used to monitor the stream's closedness")),t._readableStreamController[E](),t._reader=void 0,e._ownerReadableStream=void 0}function j(e){return new TypeError("Cannot "+e+" a stream using a released reader")}function k(e){e._closedPromise=c((t,r)=>{e._closedPromise_resolve=t,e._closedPromise_reject=r})}function A(e,t){k(e),z(e,t)}function z(e,t){void 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t=e._pendingPullIntos.peek();if(t.bytesFilled%t.elementSize!==0){const t=new TypeError("Insufficient bytes to fill elements in the given buffer");throw Je(e,t),t}}Ue(e),xr(t)}}function Xe(e,t){const r=e._controlledReadableByteStream;if(e._closeRequested||"readable"!==r._state)return;const{buffer:o,byteOffset:n,byteLength:i}=t;if(fe(o))throw new TypeError("chunk's buffer is detached and so cannot be enqueued");const a=de(o);if(e._pendingPullIntos.length>0){const t=e._pendingPullIntos.peek();if(fe(t.buffer))throw new TypeError("The BYOB request's buffer has been detached and so cannot be filled with an enqueued chunk");Qe(e),t.buffer=de(t.buffer),"none"===t.readerType&&$e(e,t)}if(K(r))if(function(e){const t=e._controlledReadableByteStream._reader;for(;t._readRequests.length>0;){if(0===e._queueTotalSize)return;Ke(e,t._readRequests.shift())}}(e),0===J(r))Le(e,a,n,i);else{e._pendingPullIntos.length>0&&Ve(e);X(r,new Uint8Array(a,n,i),!1)}else if(ct(r)){Le(e,a,n,i);De(r,Ne(e))}else Le(e,a,n,i);ke(e)}function Je(e,t){const r=e._controlledReadableByteStream;"readable"===r._state&&(Ae(e),Ee(e),Ue(e),Qr(r,t))}function Ke(e,t){const r=e._queue.shift();e._queueTotalSize-=r.byteLength,xe(e);const o=new Uint8Array(r.buffer,r.byteOffset,r.byteLength);t._chunkSteps(o)}function Ze(e){if(null===e._byobRequest&&e._pendingPullIntos.length>0){const t=e._pendingPullIntos.peek(),r=new Uint8Array(t.buffer,t.byteOffset+t.bytesFilled,t.byteLength-t.bytesFilled),o=Object.create(ReadableStreamBYOBRequest.prototype);!function(e,t,r){e._associatedReadableByteStreamController=t,e._view=r}(o,e,r),e._byobRequest=o}return e._byobRequest}function et(e){const t=e._controlledReadableByteStream._state;return"errored"===t?null:"closed"===t?0:e._strategyHWM-e._queueTotalSize}function tt(e,t){const r=e._pendingPullIntos.peek();if("closed"===e._controlledReadableByteStream._state){if(0!==t)throw new TypeError("bytesWritten must be 0 when calling respond() on a closed stream")}else{if(0===t)throw new TypeError("bytesWritten must be greater than 0 when calling respond() on a readable stream");if(r.bytesFilled+t>r.byteLength)throw new RangeError("bytesWritten out of range")}r.buffer=de(r.buffer),He(e,t)}function rt(e,t){const r=e._pendingPullIntos.peek();if("closed"===e._controlledReadableByteStream._state){if(0!==t.byteLength)throw new TypeError("The view's length must be 0 when calling respondWithNewView() on a closed stream")}else if(0===t.byteLength)throw new TypeError("The view's length must be greater than 0 when calling respondWithNewView() on a readable stream");if(r.byteOffset+r.bytesFilled!==t.byteOffset)throw new RangeError("The region specified by view does not match byobRequest");if(r.bufferByteLength!==t.buffer.byteLength)throw new RangeError("The buffer of view has different capacity than byobRequest");if(r.bytesFilled+t.byteLength>r.byteLength)throw new RangeError("The region specified by view is larger than byobRequest");const o=t.byteLength;r.buffer=de(t.buffer),He(e,o)}function ot(e,t,r,o,n,i,a){t._controlledReadableByteStream=e,t._pullAgain=!1,t._pulling=!1,t._byobRequest=null,t._queue=t._queueTotalSize=void 0,Ee(t),t._closeRequested=!1,t._started=!1,t._strategyHWM=i,t._pullAlgorithm=o,t._cancelAlgorithm=n,t._autoAllocateChunkSize=a,t._pendingPullIntos=new w,e._readableStreamController=t;h(d(r()),()=>(t._started=!0,ke(t),null),e=>(Je(t,e),null))}function nt(e){return new TypeError(`ReadableStreamBYOBRequest.prototype.${e} can only be used on a ReadableStreamBYOBRequest`)}function it(e){return new TypeError(`ReadableByteStreamController.prototype.${e} can only be used on a ReadableByteStreamController`)}function at(e,t){if("byob"!==(e=`${e}`))throw new TypeError(`${t} '${e}' is not a valid enumeration value for ReadableStreamReaderMode`);return e}function st(e){return new ReadableStreamBYOBReader(e)}function lt(e,t){e._reader._readIntoRequests.push(t)}function ut(e){return e._reader._readIntoRequests.length}function ct(e){const t=e._reader;return void 0!==t&&!!bt(t)}Object.defineProperties(ReadableByteStreamController.prototype,{close:{enumerable:!0},enqueue:{enumerable:!0},error:{enumerable:!0},byobRequest:{enumerable:!0},desiredSize:{enumerable:!0}}),n(ReadableByteStreamController.prototype.close,"close"),n(ReadableByteStreamController.prototype.enqueue,"enqueue"),n(ReadableByteStreamController.prototype.error,"error"),"symbol"==typeof Symbol.toStringTag&&Object.defineProperty(ReadableByteStreamController.prototype,Symbol.toStringTag,{value:"ReadableByteStreamController",configurable:!0});class ReadableStreamBYOBReader{constructor(e){if(Y(e,1,"ReadableStreamBYOBReader"),V(e,"First parameter"),Mr(e))throw new TypeError("This stream has already been locked for exclusive reading by another reader");if(!Oe(e._readableStreamController))throw new TypeError("Cannot construct a ReadableStreamBYOBReader for a stream not constructed with a byte source");W(this,e),this._readIntoRequests=new w}get closed(){return bt(this)?this._closedPromise:f(mt("closed"))}cancel(e=void 0){return bt(this)?void 0===this._ownerReadableStream?f(j("cancel")):B(this,e):f(mt("cancel"))}read(e,t={}){if(!bt(this))return f(mt("read"));if(!ArrayBuffer.isView(e))return f(new TypeError("view must be an array buffer view"));if(0===e.byteLength)return f(new TypeError("view must have non-zero byteLength"));if(0===e.buffer.byteLength)return f(new TypeError("view's buffer must have non-zero byteLength"));if(fe(e.buffer))return f(new TypeError("view's buffer has been detached"));let r;try{r=function(e,t){var r;return I(e,t),{min:H(null!==(r=null==e?void 0:e.min)&&void 0!==r?r:1,`${t} has member 'min' that`)}}(t,"options")}catch(e){return f(e)}const o=r.min;if(0===o)return f(new TypeError("options.min must be greater than 0"));if(function(e){return We(e.constructor)}(e)){if(o>e.byteLength)return f(new RangeError("options.min must be less than or equal to view's 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bt(e){return!!r(e)&&(!!Object.prototype.hasOwnProperty.call(e,"_readIntoRequests")&&e instanceof ReadableStreamBYOBReader)}function ht(e,t,r,o){const n=e._ownerReadableStream;n._disturbed=!0,"errored"===n._state?o._errorSteps(n._storedError):function(e,t,r,o){const n=e._controlledReadableByteStream,i=t.constructor,a=Be(i),{byteOffset:s,byteLength:l}=t,u=r*a;let c;try{c=de(t.buffer)}catch(e){return void o._errorSteps(e)}const d={buffer:c,bufferByteLength:c.byteLength,byteOffset:s,byteLength:l,bytesFilled:0,minimumFill:u,elementSize:a,viewConstructor:i,readerType:"byob"};if(e._pendingPullIntos.length>0)return e._pendingPullIntos.push(d),void lt(n,o);if("closed"===n._state){const e=new i(d.buffer,d.byteOffset,0);return void o._closeSteps(e)}if(e._queueTotalSize>0){if(Me(e,d)){const t=Fe(d);return xe(e),void o._chunkSteps(t)}if(e._closeRequested){const t=new TypeError("Insufficient bytes to fill elements in the given buffer");return Je(e,t),void o._errorSteps(t)}}e._pendingPullIntos.push(d),lt(n,o),ke(e)}(n._readableStreamController,t,r,o)}function _t(e,t){const r=e._readIntoRequests;e._readIntoRequests=new w,r.forEach(e=>{e._errorSteps(t)})}function mt(e){return new TypeError(`ReadableStreamBYOBReader.prototype.${e} can only be used on a ReadableStreamBYOBReader`)}function pt(e,t){const{highWaterMark:r}=e;if(void 0===r)return t;if(Te(r)||r<0)throw new RangeError("Invalid highWaterMark");return r}function yt(e){const{size:t}=e;return t||(()=>1)}function St(e,t){I(e,t);const r=null==e?void 0:e.highWaterMark,o=null==e?void 0:e.size;return{highWaterMark:void 0===r?void 0:Q(r),size:void 0===o?void 0:gt(o,`${t} has member 'size' that`)}}function gt(e,t){return $(e,t),t=>Q(e(t))}function vt(e,t,r){return $(e,r),r=>v(e,t,[r])}function wt(e,t,r){return $(e,r),()=>v(e,t,[])}function Rt(e,t,r){return $(e,r),r=>g(e,t,[r])}function Tt(e,t,r){return $(e,r),(r,o)=>v(e,t,[r,o])}function Pt(e,t){if(!Et(e))throw new TypeError(`${t} is not a WritableStream.`)}class WritableStream{constructor(e={},t={}){void 0===e?e=null:M(e,"First parameter");const r=St(t,"Second parameter"),o=function(e,t){I(e,t);const r=null==e?void 0:e.abort,o=null==e?void 0:e.close,n=null==e?void 0:e.start,i=null==e?void 0:e.type,a=null==e?void 0:e.write;return{abort:void 0===r?void 0:vt(r,e,`${t} has member 'abort' that`),close:void 0===o?void 0:wt(o,e,`${t} has member 'close' that`),start:void 0===n?void 0:Rt(n,e,`${t} has member 'start' that`),write:void 0===a?void 0:Tt(a,e,`${t} has member 'write' that`),type:i}}(e,"First parameter");qt(this);if(void 0!==o.type)throw new RangeError("Invalid type is specified");const n=yt(r);!function(e,t,r,o){const n=Object.create(WritableStreamDefaultController.prototype);let i,a,s,l;i=void 0!==t.start?()=>t.start(n):()=>{};a=void 0!==t.write?e=>t.write(e,n):()=>d(void 0);s=void 0!==t.close?()=>t.close():()=>d(void 0);l=void 0!==t.abort?e=>t.abort(e):()=>d(void 0);Ht(e,n,i,a,s,l,r,o)}(this,o,pt(r,1),n)}get locked(){if(!Et(this))throw Zt("locked");return Wt(this)}abort(e=void 0){return Et(this)?Wt(this)?f(new TypeError("Cannot abort a stream that already has a writer")):Bt(this,e):f(Zt("abort"))}close(){return Et(this)?Wt(this)?f(new TypeError("Cannot close a stream that already has a writer")):zt(this)?f(new TypeError("Cannot close an already-closing stream")):Ot(this):f(Zt("close"))}getWriter(){if(!Et(this))throw Zt("getWriter");return Ct(this)}}function Ct(e){return new WritableStreamDefaultWriter(e)}function qt(e){e._state="writable",e._storedError=void 0,e._writer=void 0,e._writableStreamController=void 0,e._writeRequests=new w,e._inFlightWriteRequest=void 0,e._closeRequest=void 0,e._inFlightCloseRequest=void 0,e._pendingAbortRequest=void 0,e._backpressure=!1}function Et(e){return!!r(e)&&(!!Object.prototype.hasOwnProperty.call(e,"_writableStreamController")&&e instanceof WritableStream)}function Wt(e){return void 0!==e._writer}function Bt(e,t){var r;if("closed"===e._state||"errored"===e._state)return d(void 0);e._writableStreamController._abortReason=t,null===(r=e._writableStreamController._abortController)||void 0===r||r.abort(t);const o=e._state;if("closed"===o||"errored"===o)return d(void 0);if(void 0!==e._pendingAbortRequest)return e._pendingAbortRequest._promise;let n=!1;"erroring"===o&&(n=!0,t=void 0);const i=c((r,o)=>{e._pendingAbortRequest={_promise:void 0,_resolve:r,_reject:o,_reason:t,_wasAlreadyErroring:n}});return e._pendingAbortRequest._promise=i,n||kt(e,t),i}function Ot(e){const t=e._state;if("closed"===t||"errored"===t)return f(new TypeError(`The stream (in ${t} state) is not in the writable state and cannot be closed`));const r=c((t,r)=>{const o={_resolve:t,_reject:r};e._closeRequest=o}),o=e._writer;var n;return void 0!==o&&e._backpressure&&"writable"===t&&dr(o),qe(n=e._writableStreamController,Qt,0),Gt(n),r}function jt(e,t){"writable"!==e._state?At(e):kt(e,t)}function kt(e,t){const r=e._writableStreamController;e._state="erroring",e._storedError=t;const o=e._writer;void 0!==o&&Mt(o,t),!function(e){if(void 0===e._inFlightWriteRequest&&void 0===e._inFlightCloseRequest)return!1;return!0}(e)&&r._started&&At(e)}function At(e){e._state="errored",e._writableStreamController[T]();const t=e._storedError;if(e._writeRequests.forEach(e=>{e._reject(t)}),e._writeRequests=new w,void 0===e._pendingAbortRequest)return void Dt(e);const r=e._pendingAbortRequest;if(e._pendingAbortRequest=void 0,r._wasAlreadyErroring)return r._reject(t),void Dt(e);h(e._writableStreamController[R](r._reason),()=>(r._resolve(),Dt(e),null),t=>(r._reject(t),Dt(e),null))}function zt(e){return void 0!==e._closeRequest||void 0!==e._inFlightCloseRequest}function Dt(e){void 0!==e._closeRequest&&(e._closeRequest._reject(e._storedError),e._closeRequest=void 0);const t=e._writer;void 0!==t&&ir(t,e._storedError)}function Ft(e,t){const r=e._writer;void 0!==r&&t!==e._backpressure&&(t?function(e){sr(e)}(r):dr(r)),e._backpressure=t}Object.defineProperties(WritableStream.prototype,{abort:{enumerable:!0},close:{enumerable:!0},getWriter:{enumerable:!0},locked:{enumerable:!0}}),n(WritableStream.prototype.abort,"abort"),n(WritableStream.prototype.close,"close"),n(WritableStream.prototype.getWriter,"getWriter"),"symbol"==typeof Symbol.toStringTag&&Object.defineProperty(WritableStream.prototype,Symbol.toStringTag,{value:"WritableStream",configurable:!0});class WritableStreamDefaultWriter{constructor(e){if(Y(e,1,"WritableStreamDefaultWriter"),Pt(e,"First parameter"),Wt(e))throw new TypeError("This stream has already been locked for exclusive writing by another writer");this._ownerWritableStream=e,e._writer=this;const t=e._state;if("writable"===t)!zt(e)&&e._backpressure?sr(this):ur(this),or(this);else if("erroring"===t)lr(this,e._storedError),or(this);else if("closed"===t)ur(this),or(r=this),ar(r);else{const t=e._storedError;lr(this,t),nr(this,t)}var r}get closed(){return Lt(this)?this._closedPromise:f(tr("closed"))}get desiredSize(){if(!Lt(this))throw tr("desiredSize");if(void 0===this._ownerWritableStream)throw rr("desiredSize");return function(e){const t=e._ownerWritableStream,r=t._state;if("errored"===r||"erroring"===r)return null;if("closed"===r)return 0;return Ut(t._writableStreamController)}(this)}get ready(){return Lt(this)?this._readyPromise:f(tr("ready"))}abort(e=void 0){return Lt(this)?void 0===this._ownerWritableStream?f(rr("abort")):function(e,t){return Bt(e._ownerWritableStream,t)}(this,e):f(tr("abort"))}close(){if(!Lt(this))return f(tr("close"));const e=this._ownerWritableStream;return void 0===e?f(rr("close")):zt(e)?f(new TypeError("Cannot close an already-closing stream")):It(this)}releaseLock(){if(!Lt(this))throw tr("releaseLock");void 0!==this._ownerWritableStream&&Yt(this)}write(e=void 0){return Lt(this)?void 0===this._ownerWritableStream?f(rr("write to")):xt(this,e):f(tr("write"))}}function Lt(e){return!!r(e)&&(!!Object.prototype.hasOwnProperty.call(e,"_ownerWritableStream")&&e instanceof WritableStreamDefaultWriter)}function It(e){return Ot(e._ownerWritableStream)}function $t(e,t){"pending"===e._closedPromiseState?ir(e,t):function(e,t){nr(e,t)}(e,t)}function Mt(e,t){"pending"===e._readyPromiseState?cr(e,t):function(e,t){lr(e,t)}(e,t)}function Yt(e){const t=e._ownerWritableStream,r=new TypeError("Writer was released and can no longer be used to monitor the stream's closedness");Mt(e,r),$t(e,r),t._writer=void 0,e._ownerWritableStream=void 0}function xt(e,t){const r=e._ownerWritableStream,o=r._writableStreamController,n=function(e,t){if(void 0===e._strategySizeAlgorithm)return 1;try{return e._strategySizeAlgorithm(t)}catch(t){return Xt(e,t),1}}(o,t);if(r!==e._ownerWritableStream)return f(rr("write to"));const i=r._state;if("errored"===i)return f(r._storedError);if(zt(r)||"closed"===i)return f(new TypeError("The stream is closing or 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WritableStreamDefaultController{constructor(){throw new TypeError("Illegal constructor")}get abortReason(){if(!Nt(this))throw er("abortReason");return this._abortReason}get signal(){if(!Nt(this))throw er("signal");if(void 0===this._abortController)throw new TypeError("WritableStreamDefaultController.prototype.signal is not supported");return this._abortController.signal}error(e=void 0){if(!Nt(this))throw er("error");"writable"===this._controlledWritableStream._state&&Kt(this,e)}[R](e){const t=this._abortAlgorithm(e);return Vt(this),t}[T](){Ee(this)}}function Nt(e){return!!r(e)&&(!!Object.prototype.hasOwnProperty.call(e,"_controlledWritableStream")&&e instanceof WritableStreamDefaultController)}function Ht(e,t,r,o,n,i,a,s){t._controlledWritableStream=e,e._writableStreamController=t,t._queue=void 0,t._queueTotalSize=void 0,Ee(t),t._abortReason=void 0,t._abortController=function(){if("function"==typeof AbortController)return new AbortController}(),t._started=!1,t._strategySizeAlgorithm=s,t._strategyHWM=a,t._writeAlgorithm=o,t._closeAlgorithm=n,t._abortAlgorithm=i;const l=Jt(t);Ft(e,l);h(d(r()),()=>(t._started=!0,Gt(t),null),r=>(t._started=!0,jt(e,r),null))}function Vt(e){e._writeAlgorithm=void 0,e._closeAlgorithm=void 0,e._abortAlgorithm=void 0,e._strategySizeAlgorithm=void 0}function Ut(e){return e._strategyHWM-e._queueTotalSize}function Gt(e){const t=e._controlledWritableStream;if(!e._started)return;if(void 0!==t._inFlightWriteRequest)return;if("erroring"===t._state)return void At(t);if(0===e._queue.length)return;const r=e._queue.peek().value;r===Qt?function(e){const t=e._controlledWritableStream;(function(e){e._inFlightCloseRequest=e._closeRequest,e._closeRequest=void 0})(t),Ce(e);const r=e._closeAlgorithm();Vt(e),h(r,()=>(function(e){e._inFlightCloseRequest._resolve(void 0),e._inFlightCloseRequest=void 0,"erroring"===e._state&&(e._storedError=void 0,void 0!==e._pendingAbortRequest&&(e._pendingAbortRequest._resolve(),e._pendingAbortRequest=void 0)),e._state="closed";const t=e._writer;void 0!==t&&ar(t)}(t),null),e=>(function(e,t){e._inFlightCloseRequest._reject(t),e._inFlightCloseRequest=void 0,void 0!==e._pendingAbortRequest&&(e._pendingAbortRequest._reject(t),e._pendingAbortRequest=void 0),jt(e,t)}(t,e),null))}(e):function(e,t){const r=e._controlledWritableStream;!function(e){e._inFlightWriteRequest=e._writeRequests.shift()}(r);const o=e._writeAlgorithm(t);h(o,()=>{!function(e){e._inFlightWriteRequest._resolve(void 0),e._inFlightWriteRequest=void 0}(r);const t=r._state;if(Ce(e),!zt(r)&&"writable"===t){const t=Jt(e);Ft(r,t)}return Gt(e),null},t=>("writable"===r._state&&Vt(e),function(e,t){e._inFlightWriteRequest._reject(t),e._inFlightWriteRequest=void 0,jt(e,t)}(r,t),null))}(e,r)}function Xt(e,t){"writable"===e._controlledWritableStream._state&&Kt(e,t)}function Jt(e){return Ut(e)<=0}function Kt(e,t){const r=e._controlledWritableStream;Vt(e),kt(r,t)}function Zt(e){return new TypeError(`WritableStream.prototype.${e} can only be used on a WritableStream`)}function er(e){return new TypeError(`WritableStreamDefaultController.prototype.${e} can only be used on a WritableStreamDefaultController`)}function tr(e){return new TypeError(`WritableStreamDefaultWriter.prototype.${e} can only be used on a WritableStreamDefaultWriter`)}function rr(e){return new TypeError("Cannot "+e+" a stream using a released writer")}function or(e){e._closedPromise=c((t,r)=>{e._closedPromise_resolve=t,e._closedPromise_reject=r,e._closedPromiseState="pending"})}function nr(e,t){or(e),ir(e,t)}function ir(e,t){void 0!==e._closedPromise_reject&&(y(e._closedPromise),e._closedPromise_reject(t),e._closedPromise_resolve=void 0,e._closedPromise_reject=void 0,e._closedPromiseState="rejected")}function ar(e){void 0!==e._closedPromise_resolve&&(e._closedPromise_resolve(void 0),e._closedPromise_resolve=void 0,e._closedPromise_reject=void 0,e._closedPromiseState="resolved")}function sr(e){e._readyPromise=c((t,r)=>{e._readyPromise_resolve=t,e._readyPromise_reject=r}),e._readyPromiseState="pending"}function lr(e,t){sr(e),cr(e,t)}function ur(e){sr(e),dr(e)}function cr(e,t){void 0!==e._readyPromise_reject&&(y(e._readyPromise),e._readyPromise_reject(t),e._readyPromise_resolve=void 0,e._readyPromise_reject=void 0,e._readyPromiseState="rejected")}function dr(e){void 0!==e._readyPromise_resolve&&(e._readyPromise_resolve(void 0),e._readyPromise_resolve=void 0,e._readyPromise_reject=void 0,e._readyPromiseState="fulfilled")}Object.defineProperties(WritableStreamDefaultController.prototype,{abortReason:{enumerable:!0},signal:{enumerable:!0},error:{enumerable:!0}}),"symbol"==typeof Symbol.toStringTag&&Object.defineProperty(WritableStreamDefaultController.prototype,Symbol.toStringTag,{value:"WritableStreamDefaultController",configurable:!0});const fr="undefined"!=typeof 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