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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 | 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 13x 13x 13x 13x 13x 13x 1x 1x 13x 2x 2x 2x 2x 2x 2x 2x 2x 2x 13x 13x 13x 2x 2x 2x 2x 2x 2x 2x 2x 2x 141x 141x 18x 18x 17x 18x 18x 16x 18x 3x 3x 3x 3x 111x 111x 3x 3x 3x 13x 18x 11x 11x 11x 11x 11x 16x 16x 16x 11x 11x 11x 2x 14x 2x 14x 1x 1x 1x 1x 1x 1x 1x 18x 124x 141x 124x 124x 124x 141x 111x 111x 111x 111x 111x 111x 141x | /** @import { Snapshot } from './types' */ import { DEV } from 'esm-env'; import * as w from './warnings.js'; import { get_prototype_of, is_array, object_prototype } from './utils.js'; /** * In dev, we keep track of which properties could not be cloned. In prod * we don't bother, but we keep a dummy array around so that the * signature stays the same * @type {string[]} */ const empty = []; /** * @template T * @param {T} value * @param {boolean} [skip_warning] * @returns {Snapshot<T>} */ export function snapshot(value, skip_warning = false) { if (DEV && !skip_warning) { /** @type {string[]} */ const paths = []; const copy = clone(value, new Map(), '', paths); if (paths.length === 1 && paths[0] === '') { // value could not be cloned w.state_snapshot_uncloneable(); } else if (paths.length > 0) { // some properties could not be cloned const slice = paths.length > 10 ? paths.slice(0, 7) : paths.slice(0, 10); const excess = paths.length - slice.length; let uncloned = slice.map((path) => `- <value>${path}`).join('\n'); if (excess > 0) uncloned += `\n- ...and ${excess} more`; w.state_snapshot_uncloneable(uncloned); } return copy; } return clone(value, new Map(), '', empty); } /** * @template T * @param {T} value * @param {Map<T, Snapshot<T>>} cloned * @param {string} path * @param {string[]} paths * @returns {Snapshot<T>} */ function clone(value, cloned, path, paths) { if (typeof value === 'object' && value !== null) { const unwrapped = cloned.get(value); if (unwrapped !== undefined) return unwrapped; if (value instanceof Map) return /** @type {Snapshot<T>} */ (new Map(value)); if (value instanceof Set) return /** @type {Snapshot<T>} */ (new Set(value)); if (is_array(value)) { const copy = /** @type {Snapshot<any>} */ ([]); cloned.set(value, copy); for (let i = 0; i < value.length; i += 1) { copy.push(clone(value[i], cloned, DEV ? `${path}[${i}]` : path, paths)); } return copy; } if (get_prototype_of(value) === object_prototype) { /** @type {Snapshot<any>} */ const copy = {}; cloned.set(value, copy); for (var key in value) { // @ts-expect-error copy[key] = clone(value[key], cloned, DEV ? `${path}.${key}` : path, paths); } return copy; } if (value instanceof Date) { return /** @type {Snapshot<T>} */ (structuredClone(value)); } if (typeof (/** @type {T & { toJSON?: any } } */ (value).toJSON) === 'function') { return clone( /** @type {T & { toJSON(): any } } */ (value).toJSON(), cloned, DEV ? `${path}.toJSON()` : path, paths ); } } if (value instanceof EventTarget) { // can't be cloned return /** @type {Snapshot<T>} */ (value); } try { return /** @type {Snapshot<T>} */ (structuredClone(value)); } catch (e) { if (DEV) { paths.push(path); } return /** @type {Snapshot<T>} */ (value); } } |