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web.structured-clone.js 19KB

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  1. 'use strict';
  2. var IS_PURE = require('../internals/is-pure');
  3. var $ = require('../internals/export');
  4. var global = require('../internals/global');
  5. var getBuiltIn = require('../internals/get-built-in');
  6. var uncurryThis = require('../internals/function-uncurry-this');
  7. var fails = require('../internals/fails');
  8. var uid = require('../internals/uid');
  9. var isCallable = require('../internals/is-callable');
  10. var isConstructor = require('../internals/is-constructor');
  11. var isNullOrUndefined = require('../internals/is-null-or-undefined');
  12. var isObject = require('../internals/is-object');
  13. var isSymbol = require('../internals/is-symbol');
  14. var iterate = require('../internals/iterate');
  15. var anObject = require('../internals/an-object');
  16. var classof = require('../internals/classof');
  17. var hasOwn = require('../internals/has-own-property');
  18. var createProperty = require('../internals/create-property');
  19. var createNonEnumerableProperty = require('../internals/create-non-enumerable-property');
  20. var lengthOfArrayLike = require('../internals/length-of-array-like');
  21. var validateArgumentsLength = require('../internals/validate-arguments-length');
  22. var getRegExpFlags = require('../internals/regexp-get-flags');
  23. var MapHelpers = require('../internals/map-helpers');
  24. var SetHelpers = require('../internals/set-helpers');
  25. var setIterate = require('../internals/set-iterate');
  26. var detachTransferable = require('../internals/detach-transferable');
  27. var ERROR_STACK_INSTALLABLE = require('../internals/error-stack-installable');
  28. var PROPER_STRUCTURED_CLONE_TRANSFER = require('../internals/structured-clone-proper-transfer');
  29. var Object = global.Object;
  30. var Array = global.Array;
  31. var Date = global.Date;
  32. var Error = global.Error;
  33. var TypeError = global.TypeError;
  34. var PerformanceMark = global.PerformanceMark;
  35. var DOMException = getBuiltIn('DOMException');
  36. var Map = MapHelpers.Map;
  37. var mapHas = MapHelpers.has;
  38. var mapGet = MapHelpers.get;
  39. var mapSet = MapHelpers.set;
  40. var Set = SetHelpers.Set;
  41. var setAdd = SetHelpers.add;
  42. var setHas = SetHelpers.has;
  43. var objectKeys = getBuiltIn('Object', 'keys');
  44. var push = uncurryThis([].push);
  45. var thisBooleanValue = uncurryThis(true.valueOf);
  46. var thisNumberValue = uncurryThis(1.0.valueOf);
  47. var thisStringValue = uncurryThis(''.valueOf);
  48. var thisTimeValue = uncurryThis(Date.prototype.getTime);
  49. var PERFORMANCE_MARK = uid('structuredClone');
  50. var DATA_CLONE_ERROR = 'DataCloneError';
  51. var TRANSFERRING = 'Transferring';
  52. var checkBasicSemantic = function (structuredCloneImplementation) {
  53. return !fails(function () {
  54. var set1 = new global.Set([7]);
  55. var set2 = structuredCloneImplementation(set1);
  56. var number = structuredCloneImplementation(Object(7));
  57. return set2 === set1 || !set2.has(7) || !isObject(number) || +number !== 7;
  58. }) && structuredCloneImplementation;
  59. };
  60. var checkErrorsCloning = function (structuredCloneImplementation, $Error) {
  61. return !fails(function () {
  62. var error = new $Error();
  63. var test = structuredCloneImplementation({ a: error, b: error });
  64. return !(test && test.a === test.b && test.a instanceof $Error && test.a.stack === error.stack);
  65. });
  66. };
  67. // https://github.com/whatwg/html/pull/5749
  68. var checkNewErrorsCloningSemantic = function (structuredCloneImplementation) {
  69. return !fails(function () {
  70. var test = structuredCloneImplementation(new global.AggregateError([1], PERFORMANCE_MARK, { cause: 3 }));
  71. return test.name !== 'AggregateError' || test.errors[0] !== 1 || test.message !== PERFORMANCE_MARK || test.cause !== 3;
  72. });
  73. };
  74. // FF94+, Safari 15.4+, Chrome 98+, NodeJS 17.0+, Deno 1.13+
  75. // FF<103 and Safari implementations can't clone errors
  76. // https://bugzilla.mozilla.org/show_bug.cgi?id=1556604
  77. // FF103 can clone errors, but `.stack` of clone is an empty string
  78. // https://bugzilla.mozilla.org/show_bug.cgi?id=1778762
  79. // FF104+ fixed it on usual errors, but not on DOMExceptions
  80. // https://bugzilla.mozilla.org/show_bug.cgi?id=1777321
  81. // Chrome <102 returns `null` if cloned object contains multiple references to one error
  82. // https://bugs.chromium.org/p/v8/issues/detail?id=12542
  83. // NodeJS implementation can't clone DOMExceptions
  84. // https://github.com/nodejs/node/issues/41038
  85. // only FF103+ supports new (html/5749) error cloning semantic
  86. var nativeStructuredClone = global.structuredClone;
  87. var FORCED_REPLACEMENT = IS_PURE
  88. || !checkErrorsCloning(nativeStructuredClone, Error)
  89. || !checkErrorsCloning(nativeStructuredClone, DOMException)
  90. || !checkNewErrorsCloningSemantic(nativeStructuredClone);
  91. // Chrome 82+, Safari 14.1+, Deno 1.11+
  92. // Chrome 78-81 implementation swaps `.name` and `.message` of cloned `DOMException`
  93. // Chrome returns `null` if cloned object contains multiple references to one error
  94. // Safari 14.1 implementation doesn't clone some `RegExp` flags, so requires a workaround
  95. // Safari implementation can't clone errors
  96. // Deno 1.2-1.10 implementations too naive
  97. // NodeJS 16.0+ does not have `PerformanceMark` constructor
  98. // NodeJS <17.2 structured cloning implementation from `performance.mark` is too naive
  99. // and can't clone, for example, `RegExp` or some boxed primitives
  100. // https://github.com/nodejs/node/issues/40840
  101. // no one of those implementations supports new (html/5749) error cloning semantic
  102. var structuredCloneFromMark = !nativeStructuredClone && checkBasicSemantic(function (value) {
  103. return new PerformanceMark(PERFORMANCE_MARK, { detail: value }).detail;
  104. });
  105. var nativeRestrictedStructuredClone = checkBasicSemantic(nativeStructuredClone) || structuredCloneFromMark;
  106. var throwUncloneable = function (type) {
  107. throw new DOMException('Uncloneable type: ' + type, DATA_CLONE_ERROR);
  108. };
  109. var throwUnpolyfillable = function (type, action) {
  110. throw new DOMException((action || 'Cloning') + ' of ' + type + ' cannot be properly polyfilled in this engine', DATA_CLONE_ERROR);
  111. };
  112. var tryNativeRestrictedStructuredClone = function (value, type) {
  113. if (!nativeRestrictedStructuredClone) throwUnpolyfillable(type);
  114. return nativeRestrictedStructuredClone(value);
  115. };
  116. var createDataTransfer = function () {
  117. var dataTransfer;
  118. try {
  119. dataTransfer = new global.DataTransfer();
  120. } catch (error) {
  121. try {
  122. dataTransfer = new global.ClipboardEvent('').clipboardData;
  123. } catch (error2) { /* empty */ }
  124. }
  125. return dataTransfer && dataTransfer.items && dataTransfer.files ? dataTransfer : null;
  126. };
  127. var cloneBuffer = function (value, map, $type) {
  128. if (mapHas(map, value)) return mapGet(map, value);
  129. var type = $type || classof(value);
  130. var clone, length, options, source, target, i;
  131. if (type === 'SharedArrayBuffer') {
  132. if (nativeRestrictedStructuredClone) clone = nativeRestrictedStructuredClone(value);
  133. // SharedArrayBuffer should use shared memory, we can't polyfill it, so return the original
  134. else clone = value;
  135. } else {
  136. var DataView = global.DataView;
  137. // `ArrayBuffer#slice` is not available in IE10
  138. // `ArrayBuffer#slice` and `DataView` are not available in old FF
  139. if (!DataView && !isCallable(value.slice)) throwUnpolyfillable('ArrayBuffer');
  140. // detached buffers throws in `DataView` and `.slice`
  141. try {
  142. if (isCallable(value.slice) && !value.resizable) {
  143. clone = value.slice(0);
  144. } else {
  145. length = value.byteLength;
  146. options = 'maxByteLength' in value ? { maxByteLength: value.maxByteLength } : undefined;
  147. clone = new ArrayBuffer(length, options);
  148. source = new DataView(value);
  149. target = new DataView(clone);
  150. for (i = 0; i < length; i++) {
  151. target.setUint8(i, source.getUint8(i));
  152. }
  153. }
  154. } catch (error) {
  155. throw new DOMException('ArrayBuffer is detached', DATA_CLONE_ERROR);
  156. }
  157. }
  158. mapSet(map, value, clone);
  159. return clone;
  160. };
  161. var cloneView = function (value, type, offset, length, map) {
  162. var C = global[type];
  163. // in some old engines like Safari 9, typeof C is 'object'
  164. // on Uint8ClampedArray or some other constructors
  165. if (!isObject(C)) throwUnpolyfillable(type);
  166. return new C(cloneBuffer(value.buffer, map), offset, length);
  167. };
  168. var structuredCloneInternal = function (value, map) {
  169. if (isSymbol(value)) throwUncloneable('Symbol');
  170. if (!isObject(value)) return value;
  171. // effectively preserves circular references
  172. if (map) {
  173. if (mapHas(map, value)) return mapGet(map, value);
  174. } else map = new Map();
  175. var type = classof(value);
  176. var C, name, cloned, dataTransfer, i, length, keys, key;
  177. switch (type) {
  178. case 'Array':
  179. cloned = Array(lengthOfArrayLike(value));
  180. break;
  181. case 'Object':
  182. cloned = {};
  183. break;
  184. case 'Map':
  185. cloned = new Map();
  186. break;
  187. case 'Set':
  188. cloned = new Set();
  189. break;
  190. case 'RegExp':
  191. // in this block because of a Safari 14.1 bug
  192. // old FF does not clone regexes passed to the constructor, so get the source and flags directly
  193. cloned = new RegExp(value.source, getRegExpFlags(value));
  194. break;
  195. case 'Error':
  196. name = value.name;
  197. switch (name) {
  198. case 'AggregateError':
  199. cloned = new (getBuiltIn(name))([]);
  200. break;
  201. case 'EvalError':
  202. case 'RangeError':
  203. case 'ReferenceError':
  204. case 'SuppressedError':
  205. case 'SyntaxError':
  206. case 'TypeError':
  207. case 'URIError':
  208. cloned = new (getBuiltIn(name))();
  209. break;
  210. case 'CompileError':
  211. case 'LinkError':
  212. case 'RuntimeError':
  213. cloned = new (getBuiltIn('WebAssembly', name))();
  214. break;
  215. default:
  216. cloned = new Error();
  217. }
  218. break;
  219. case 'DOMException':
  220. cloned = new DOMException(value.message, value.name);
  221. break;
  222. case 'ArrayBuffer':
  223. case 'SharedArrayBuffer':
  224. cloned = cloneBuffer(value, map, type);
  225. break;
  226. case 'DataView':
  227. case 'Int8Array':
  228. case 'Uint8Array':
  229. case 'Uint8ClampedArray':
  230. case 'Int16Array':
  231. case 'Uint16Array':
  232. case 'Int32Array':
  233. case 'Uint32Array':
  234. case 'Float16Array':
  235. case 'Float32Array':
  236. case 'Float64Array':
  237. case 'BigInt64Array':
  238. case 'BigUint64Array':
  239. length = type === 'DataView' ? value.byteLength : value.length;
  240. cloned = cloneView(value, type, value.byteOffset, length, map);
  241. break;
  242. case 'DOMQuad':
  243. try {
  244. cloned = new DOMQuad(
  245. structuredCloneInternal(value.p1, map),
  246. structuredCloneInternal(value.p2, map),
  247. structuredCloneInternal(value.p3, map),
  248. structuredCloneInternal(value.p4, map)
  249. );
  250. } catch (error) {
  251. cloned = tryNativeRestrictedStructuredClone(value, type);
  252. }
  253. break;
  254. case 'File':
  255. if (nativeRestrictedStructuredClone) try {
  256. cloned = nativeRestrictedStructuredClone(value);
  257. // NodeJS 20.0.0 bug, https://github.com/nodejs/node/issues/47612
  258. if (classof(cloned) !== type) cloned = undefined;
  259. } catch (error) { /* empty */ }
  260. if (!cloned) try {
  261. cloned = new File([value], value.name, value);
  262. } catch (error) { /* empty */ }
  263. if (!cloned) throwUnpolyfillable(type);
  264. break;
  265. case 'FileList':
  266. dataTransfer = createDataTransfer();
  267. if (dataTransfer) {
  268. for (i = 0, length = lengthOfArrayLike(value); i < length; i++) {
  269. dataTransfer.items.add(structuredCloneInternal(value[i], map));
  270. }
  271. cloned = dataTransfer.files;
  272. } else cloned = tryNativeRestrictedStructuredClone(value, type);
  273. break;
  274. case 'ImageData':
  275. // Safari 9 ImageData is a constructor, but typeof ImageData is 'object'
  276. try {
  277. cloned = new ImageData(
  278. structuredCloneInternal(value.data, map),
  279. value.width,
  280. value.height,
  281. { colorSpace: value.colorSpace }
  282. );
  283. } catch (error) {
  284. cloned = tryNativeRestrictedStructuredClone(value, type);
  285. } break;
  286. default:
  287. if (nativeRestrictedStructuredClone) {
  288. cloned = nativeRestrictedStructuredClone(value);
  289. } else switch (type) {
  290. case 'BigInt':
  291. // can be a 3rd party polyfill
  292. cloned = Object(value.valueOf());
  293. break;
  294. case 'Boolean':
  295. cloned = Object(thisBooleanValue(value));
  296. break;
  297. case 'Number':
  298. cloned = Object(thisNumberValue(value));
  299. break;
  300. case 'String':
  301. cloned = Object(thisStringValue(value));
  302. break;
  303. case 'Date':
  304. cloned = new Date(thisTimeValue(value));
  305. break;
  306. case 'Blob':
  307. try {
  308. cloned = value.slice(0, value.size, value.type);
  309. } catch (error) {
  310. throwUnpolyfillable(type);
  311. } break;
  312. case 'DOMPoint':
  313. case 'DOMPointReadOnly':
  314. C = global[type];
  315. try {
  316. cloned = C.fromPoint
  317. ? C.fromPoint(value)
  318. : new C(value.x, value.y, value.z, value.w);
  319. } catch (error) {
  320. throwUnpolyfillable(type);
  321. } break;
  322. case 'DOMRect':
  323. case 'DOMRectReadOnly':
  324. C = global[type];
  325. try {
  326. cloned = C.fromRect
  327. ? C.fromRect(value)
  328. : new C(value.x, value.y, value.width, value.height);
  329. } catch (error) {
  330. throwUnpolyfillable(type);
  331. } break;
  332. case 'DOMMatrix':
  333. case 'DOMMatrixReadOnly':
  334. C = global[type];
  335. try {
  336. cloned = C.fromMatrix
  337. ? C.fromMatrix(value)
  338. : new C(value);
  339. } catch (error) {
  340. throwUnpolyfillable(type);
  341. } break;
  342. case 'AudioData':
  343. case 'VideoFrame':
  344. if (!isCallable(value.clone)) throwUnpolyfillable(type);
  345. try {
  346. cloned = value.clone();
  347. } catch (error) {
  348. throwUncloneable(type);
  349. } break;
  350. case 'CropTarget':
  351. case 'CryptoKey':
  352. case 'FileSystemDirectoryHandle':
  353. case 'FileSystemFileHandle':
  354. case 'FileSystemHandle':
  355. case 'GPUCompilationInfo':
  356. case 'GPUCompilationMessage':
  357. case 'ImageBitmap':
  358. case 'RTCCertificate':
  359. case 'WebAssembly.Module':
  360. throwUnpolyfillable(type);
  361. // break omitted
  362. default:
  363. throwUncloneable(type);
  364. }
  365. }
  366. mapSet(map, value, cloned);
  367. switch (type) {
  368. case 'Array':
  369. case 'Object':
  370. keys = objectKeys(value);
  371. for (i = 0, length = lengthOfArrayLike(keys); i < length; i++) {
  372. key = keys[i];
  373. createProperty(cloned, key, structuredCloneInternal(value[key], map));
  374. } break;
  375. case 'Map':
  376. value.forEach(function (v, k) {
  377. mapSet(cloned, structuredCloneInternal(k, map), structuredCloneInternal(v, map));
  378. });
  379. break;
  380. case 'Set':
  381. value.forEach(function (v) {
  382. setAdd(cloned, structuredCloneInternal(v, map));
  383. });
  384. break;
  385. case 'Error':
  386. createNonEnumerableProperty(cloned, 'message', structuredCloneInternal(value.message, map));
  387. if (hasOwn(value, 'cause')) {
  388. createNonEnumerableProperty(cloned, 'cause', structuredCloneInternal(value.cause, map));
  389. }
  390. if (name === 'AggregateError') {
  391. cloned.errors = structuredCloneInternal(value.errors, map);
  392. } else if (name === 'SuppressedError') {
  393. cloned.error = structuredCloneInternal(value.error, map);
  394. cloned.suppressed = structuredCloneInternal(value.suppressed, map);
  395. } // break omitted
  396. case 'DOMException':
  397. if (ERROR_STACK_INSTALLABLE) {
  398. createNonEnumerableProperty(cloned, 'stack', structuredCloneInternal(value.stack, map));
  399. }
  400. }
  401. return cloned;
  402. };
  403. var tryToTransfer = function (rawTransfer, map) {
  404. if (!isObject(rawTransfer)) throw new TypeError('Transfer option cannot be converted to a sequence');
  405. var transfer = [];
  406. iterate(rawTransfer, function (value) {
  407. push(transfer, anObject(value));
  408. });
  409. var i = 0;
  410. var length = lengthOfArrayLike(transfer);
  411. var buffers = new Set();
  412. var value, type, C, transferred, canvas, context;
  413. while (i < length) {
  414. value = transfer[i++];
  415. type = classof(value);
  416. if (type === 'ArrayBuffer' ? setHas(buffers, value) : mapHas(map, value)) {
  417. throw new DOMException('Duplicate transferable', DATA_CLONE_ERROR);
  418. }
  419. if (type === 'ArrayBuffer') {
  420. setAdd(buffers, value);
  421. continue;
  422. }
  423. if (PROPER_STRUCTURED_CLONE_TRANSFER) {
  424. transferred = nativeStructuredClone(value, { transfer: [value] });
  425. } else switch (type) {
  426. case 'ImageBitmap':
  427. C = global.OffscreenCanvas;
  428. if (!isConstructor(C)) throwUnpolyfillable(type, TRANSFERRING);
  429. try {
  430. canvas = new C(value.width, value.height);
  431. context = canvas.getContext('bitmaprenderer');
  432. context.transferFromImageBitmap(value);
  433. transferred = canvas.transferToImageBitmap();
  434. } catch (error) { /* empty */ }
  435. break;
  436. case 'AudioData':
  437. case 'VideoFrame':
  438. if (!isCallable(value.clone) || !isCallable(value.close)) throwUnpolyfillable(type, TRANSFERRING);
  439. try {
  440. transferred = value.clone();
  441. value.close();
  442. } catch (error) { /* empty */ }
  443. break;
  444. case 'MediaSourceHandle':
  445. case 'MessagePort':
  446. case 'OffscreenCanvas':
  447. case 'ReadableStream':
  448. case 'TransformStream':
  449. case 'WritableStream':
  450. throwUnpolyfillable(type, TRANSFERRING);
  451. }
  452. if (transferred === undefined) throw new DOMException('This object cannot be transferred: ' + type, DATA_CLONE_ERROR);
  453. mapSet(map, value, transferred);
  454. }
  455. return buffers;
  456. };
  457. var detachBuffers = function (buffers) {
  458. setIterate(buffers, function (buffer) {
  459. if (PROPER_STRUCTURED_CLONE_TRANSFER) {
  460. nativeRestrictedStructuredClone(buffer, { transfer: [buffer] });
  461. } else if (isCallable(buffer.transfer)) {
  462. buffer.transfer();
  463. } else if (detachTransferable) {
  464. detachTransferable(buffer);
  465. } else {
  466. throwUnpolyfillable('ArrayBuffer', TRANSFERRING);
  467. }
  468. });
  469. };
  470. // `structuredClone` method
  471. // https://html.spec.whatwg.org/multipage/structured-data.html#dom-structuredclone
  472. $({ global: true, enumerable: true, sham: !PROPER_STRUCTURED_CLONE_TRANSFER, forced: FORCED_REPLACEMENT }, {
  473. structuredClone: function structuredClone(value /* , { transfer } */) {
  474. var options = validateArgumentsLength(arguments.length, 1) > 1 && !isNullOrUndefined(arguments[1]) ? anObject(arguments[1]) : undefined;
  475. var transfer = options ? options.transfer : undefined;
  476. var map, buffers;
  477. if (transfer !== undefined) {
  478. map = new Map();
  479. buffers = tryToTransfer(transfer, map);
  480. }
  481. var clone = structuredCloneInternal(value, map);
  482. // since of an issue with cloning views of transferred buffers, we a forced to detach them later
  483. // https://github.com/zloirock/core-js/issues/1265
  484. if (buffers) detachBuffers(buffers);
  485. return clone;
  486. }
  487. });