snapshot of https://github.com/tldraw/tldraw.git (main, 2026-09-23; blobs > 131072B omitted)

internal/config/LICENSE.md

@@ -0,0 +1 @@
+This code is licensed under the [tldraw license](https://github.com/tldraw/tldraw/blob/main/LICENSE.md)

internal/config/api-extractor.json

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+/**
+ * Config file for API Extractor.  For more info, please visit: https://api-extractor.com
+ */
+{
+	"$schema": "https://developer.microsoft.com/json-schemas/api-extractor/v7/api-extractor.schema.json",
+	/**
+	 * Optionally specifies another JSON config file that this file extends from.  This provides a way for
+	 * standard settings to be shared across multiple projects.
+	 *
+	 * If the path starts with "./" or "../", the path is resolved relative to the folder of the file that contains
+	 * the "extends" field.  Otherwise, the first path segment is interpreted as an NPM package name, and will be
+	 * resolved using NodeJS require().
+	 *
+	 * SUPPORTED TOKENS: none
+	 * DEFAULT VALUE: ""
+	 */
+	// "extends": "./shared/api-extractor-base.json"
+	// "extends": "my-package/include/api-extractor-base.json"
+	/**
+	 * Determines the "<projectFolder>" token that can be used with other config file settings.  The project folder
+	 * typically contains the tsconfig.json and package.json config files, but the path is user-defined.
+	 *
+	 * The path is resolved relative to the folder of the config file that contains the setting.
+	 *
+	 * The default value for "projectFolder" is the token "<lookup>", which means the folder is determined by traversing
+	 * parent folders, starting from the folder containing api-extractor.json, and stopping at the first folder
+	 * that contains a tsconfig.json file.  If a tsconfig.json file cannot be found in this way, then an error
+	 * will be reported.
+	 *
+	 * SUPPORTED TOKENS: <lookup>
+	 * DEFAULT VALUE: "<lookup>"
+	 */
+	"projectFolder": "../..",
+	/**
+	 * (REQUIRED) Specifies the .d.ts file to be used as the starting point for analysis.  API Extractor
+	 * analyzes the symbols exported by this module.
+	 *
+	 * The file extension must be ".d.ts" and not ".ts".
+	 *
+	 * The path is resolved relative to the folder of the config file that contains the setting; to change this,
+	 * prepend a folder token such as "<projectFolder>".
+	 *
+	 * SUPPORTED TOKENS: <projectFolder>, <packageName>, <unscopedPackageName>
+	 */
+	"mainEntryPointFilePath": "<projectFolder>/packages/<unscopedPackageName>/.tsbuild-api/index.d.ts",
+	/**
+	 * A list of NPM package names whose exports should be treated as part of this package.
+	 *
+	 * For example, suppose that Webpack is used to generate a distributed bundle for the project "library1",
+	 * and another NPM package "library2" is embedded in this bundle.  Some types from library2 may become part
+	 * of the exported API for library1, but by default API Extractor would generate a .d.ts rollup that explicitly
+	 * imports library2.  To avoid this, we can specify:
+	 *
+	 *   "bundledPackages": [ "library2" ],
+	 *
+	 * This would direct API Extractor to embed those types directly in the .d.ts rollup, as if they had been
+	 * local files for library1.
+	 */
+	"bundledPackages": [],
+	/**
+	 * Specifies what type of newlines API Extractor should use when writing output files.  By default, the output files
+	 * will be written with Windows-style newlines.  To use POSIX-style newlines, specify "lf" instead.
+	 * To use the OS's default newline kind, specify "os".
+	 *
+	 * DEFAULT VALUE: "crlf"
+	 */
+	"newlineKind": "lf",
+	/**
+	 * Set to true when invoking API Extractor's test harness. When `testMode` is true, the `toolVersion` field in the
+	 * .api.json file is assigned an empty string to prevent spurious diffs in output files tracked for tests.
+	 *
+	 * DEFAULT VALUE: "false"
+	 */
+	// "testMode": false,
+	/**
+	 * Specifies how API Extractor sorts members of an enum when generating the .api.json file. By default, the output
+	 * files will be sorted alphabetically, which is "by-name". To keep the ordering in the source code, specify
+	 * "preserve".
+	 *
+	 * DEFAULT VALUE: "by-name"
+	 */
+	// "enumMemberOrder": "by-name",
+	/**
+	 * Determines how the TypeScript compiler engine will be invoked by API Extractor.
+	 */
+	"compiler": {
+		/**
+		 * Specifies the path to the tsconfig.json file to be used by API Extractor when analyzing the project.
+		 *
+		 * The path is resolved relative to the folder of the config file that contains the setting; to change this,
+		 * prepend a folder token such as "<projectFolder>".
+		 *
+		 * Note: This setting will be ignored if "overrideTsconfig" is used.
+		 *
+		 * SUPPORTED TOKENS: <projectFolder>, <packageName>, <unscopedPackageName>
+		 * DEFAULT VALUE: "<projectFolder>/tsconfig.json"
+		 */
+		"tsconfigFilePath": "<projectFolder>/packages/<unscopedPackageName>/tsconfig.json"
+		/**
+		 * Provides a compiler configuration that will be used instead of reading the tsconfig.json file from disk.
+		 * The object must conform to the TypeScript tsconfig schema:
+		 *
+		 * http://json.schemastore.org/tsconfig
+		 *
+		 * If omitted, then the tsconfig.json file will be read from the "projectFolder".
+		 *
+		 * DEFAULT VALUE: no overrideTsconfig section
+		 */
+		// "overrideTsconfig": {
+		//   . . .
+		// }
+		/**
+		 * This option causes the compiler to be invoked with the --skipLibCheck option. This option is not recommended
+		 * and may cause API Extractor to produce incomplete or incorrect declarations, but it may be required when
+		 * dependencies contain declarations that are incompatible with the TypeScript engine that API Extractor uses
+		 * for its analysis.  Where possible, the underlying issue should be fixed rather than relying on skipLibCheck.
+		 *
+		 * DEFAULT VALUE: false
+		 */
+		// "skipLibCheck": true,
+	},
+	/**
+	 * Configures how the API report file (*.api.md) will be generated.
+	 */
+	"apiReport": {
+		/**
+		 * (REQUIRED) Whether to generate an API report.
+		 */
+		"enabled": true,
+		/**
+		 * The filename for the API report files.  It will be combined with "reportFolder" or "reportTempFolder" to produce
+		 * a full file path.
+		 *
+		 * The file extension should be ".api.md", and the string should not contain a path separator such as "\" or "/".
+		 *
+		 * SUPPORTED TOKENS: <packageName>, <unscopedPackageName>
+		 * DEFAULT VALUE: "<unscopedPackageName>.api.md"
+		 */
+		"reportFileName": "api-report",
+		/**
+		 * Specifies the folder where the API report file is written.  The file name portion is determined by
+		 * the "reportFileName" setting.
+		 *
+		 * The API report file is normally tracked by Git.  Changes to it can be used to trigger a branch policy,
+		 * e.g. for an API review.
+		 *
+		 * The path is resolved relative to the folder of the config file that contains the setting; to change this,
+		 * prepend a folder token such as "<projectFolder>".
+		 *
+		 * SUPPORTED TOKENS: <projectFolder>, <packageName>, <unscopedPackageName>
+		 * DEFAULT VALUE: "<projectFolder>/temp/"
+		 */
+		"reportFolder": "<projectFolder>/packages/<unscopedPackageName>/",
+		/**
+		 * Specifies the folder where the temporary report file is written.  The file name portion is determined by
+		 * the "reportFileName" setting.
+		 *
+		 * After the temporary file is written to disk, it is compared with the file in the "reportFolder".
+		 * If they are different, a production build will fail.
+		 *
+		 * The path is resolved relative to the folder of the config file that contains the setting; to change this,
+		 * prepend a folder token such as "<projectFolder>".
+		 *
+		 * SUPPORTED TOKENS: <projectFolder>, <packageName>, <unscopedPackageName>
+		 * DEFAULT VALUE: "<projectFolder>/temp/"
+		 */
+		"reportTempFolder": "<projectFolder>/packages/<unscopedPackageName>/api/temp"
+		/**
+		 * Whether "forgotten exports" should be included in the API report file. Forgotten exports are declarations
+		 * flagged with `ae-forgotten-export` warnings. See https://api-extractor.com/pages/messages/ae-forgotten-export/ to
+		 * learn more.
+		 *
+		 * DEFAULT VALUE: "false"
+		 */
+		// "includeForgottenExports": false
+	},
+	/**
+	 * Configures how the doc model file (*.api.json) will be generated.
+	 */
+	"docModel": {
+		/**
+		 * (REQUIRED) Whether to generate a doc model file.
+		 */
+		"enabled": true,
+		/**
+		 * The output path for the doc model file.  The file extension should be ".api.json".
+		 *
+		 * The path is resolved relative to the folder of the config file that contains the setting; to change this,
+		 * prepend a folder token such as "<projectFolder>".
+		 *
+		 * SUPPORTED TOKENS: <projectFolder>, <packageName>, <unscopedPackageName>
+		 * DEFAULT VALUE: "<projectFolder>/temp/<unscopedPackageName>.api.json"
+		 */
+		"apiJsonFilePath": "<projectFolder>/packages/<unscopedPackageName>/api/api.json",
+		/**
+		 * Whether "forgotten exports" should be included in the doc model file. Forgotten exports are declarations
+		 * flagged with `ae-forgotten-export` warnings. See https://api-extractor.com/pages/messages/ae-forgotten-export/ to
+		 * learn more.
+		 *
+		 * DEFAULT VALUE: "false"
+		 */
+		// "includeForgottenExports": false,
+		/**
+		 * The base URL where the project's source code can be viewed on a website such as GitHub or
+		 * Azure DevOps. This URL path corresponds to the `<projectFolder>` path on disk.
+		 *
+		 * This URL is concatenated with the file paths serialized to the doc model to produce URL file paths to individual API items.
+		 * For example, if the `projectFolderUrl` is "https://github.com/microsoft/rushstack/tree/main/apps/api-extractor" and an API
+		 * item's file path is "api/ExtractorConfig.ts", the full URL file path would be
+		 * "https://github.com/microsoft/rushstack/tree/main/apps/api-extractor/api/ExtractorConfig.js".
+		 *
+		 * Can be omitted if you don't need source code links in your API documentation reference.
+		 *
+		 * SUPPORTED TOKENS: none
+		 * DEFAULT VALUE: ""
+		 */
+		"projectFolderUrl": "https://github.com/tldraw/tldraw/blob/main"
+	},
+	/**
+	 * Configures how the .d.ts rollup file will be generated.
+	 */
+	"dtsRollup": {
+		/**
+		 * (REQUIRED) Whether to generate the .d.ts rollup file.
+		 */
+		"enabled": true,
+		/**
+		 * Specifies the output path for a .d.ts rollup file to be generated without any trimming.
+		 * This file will include all declarations that are exported by the main entry point.
+		 *
+		 * If the path is an empty string, then this file will not be written.
+		 *
+		 * The path is resolved relative to the folder of the config file that contains the setting; to change this,
+		 * prepend a folder token such as "<projectFolder>".
+		 *
+		 * SUPPORTED TOKENS: <projectFolder>, <packageName>, <unscopedPackageName>
+		 * DEFAULT VALUE: "<projectFolder>/dist/<unscopedPackageName>.d.ts"
+		 */
+		"untrimmedFilePath": "<projectFolder>/packages/<unscopedPackageName>/api/internal.d.ts",
+		/**
+		 * Specifies the output path for a .d.ts rollup file to be generated with trimming for an "alpha" release.
+		 * This file will include only declarations that are marked as "@public", "@beta", or "@alpha".
+		 *
+		 * The path is resolved relative to the folder of the config file that contains the setting; to change this,
+		 * prepend a folder token such as "<projectFolder>".
+		 *
+		 * SUPPORTED TOKENS: <projectFolder>, <packageName>, <unscopedPackageName>
+		 * DEFAULT VALUE: ""
+		 */
+		// "alphaTrimmedFilePath": "0.0.0",
+		/**
+		 * Specifies the output path for a .d.ts rollup file to be generated with trimming for a "beta" release.
+		 * This file will include only declarations that are marked as "@public" or "@beta".
+		 *
+		 * The path is resolved relative to the folder of the config file that contains the setting; to change this,
+		 * prepend a folder token such as "<projectFolder>".
+		 *
+		 * SUPPORTED TOKENS: <projectFolder>, <packageName>, <unscopedPackageName>
+		 * DEFAULT VALUE: ""
+		 */
+		// "betaTrimmedFilePath": "<projectFolder>/dist/<unscopedPackageName>-beta.d.ts",
+		/**
+		 * Specifies the output path for a .d.ts rollup file to be generated with trimming for a "public" release.
+		 * This file will include only declarations that are marked as "@public".
+		 *
+		 * If the path is an empty string, then this file will not be written.
+		 *
+		 * The path is resolved relative to the folder of the config file that contains the setting; to change this,
+		 * prepend a folder token such as "<projectFolder>".
+		 *
+		 * SUPPORTED TOKENS: <projectFolder>, <packageName>, <unscopedPackageName>
+		 * DEFAULT VALUE: ""
+		 */
+		"publicTrimmedFilePath": "<projectFolder>/packages/<unscopedPackageName>/api/public.d.ts"
+		/**
+		 * When a declaration is trimmed, by default it will be replaced by a code comment such as
+		 * "Excluded from this release type: exampleMember".  Set "omitTrimmingComments" to true to remove the
+		 * declaration completely.
+		 *
+		 * DEFAULT VALUE: false
+		 */
+		// "omitTrimmingComments": true
+	},
+	/**
+	 * Configures how the tsdoc-metadata.json file will be generated.
+	 */
+	"tsdocMetadata": {
+		/**
+		 * Whether to generate the tsdoc-metadata.json file.
+		 *
+		 * DEFAULT VALUE: true
+		 */
+		"enabled": false
+		/**
+		 * Specifies where the TSDoc metadata file should be written.
+		 *
+		 * The path is resolved relative to the folder of the config file that contains the setting; to change this,
+		 * prepend a folder token such as "<projectFolder>".
+		 *
+		 * The default value is "<lookup>", which causes the path to be automatically inferred from the "tsdocMetadata",
+		 * "typings" or "main" fields of the project's package.json.  If none of these fields are set, the lookup
+		 * falls back to "tsdoc-metadata.json" in the package folder.
+		 *
+		 * SUPPORTED TOKENS: <projectFolder>, <packageName>, <unscopedPackageName>
+		 * DEFAULT VALUE: "<lookup>"
+		 */
+		// "tsdocMetadataFilePath": "<projectFolder>/dist/tsdoc-metadata.json"
+	},
+	/**
+	 * Configures how API Extractor reports error and warning messages produced during analysis.
+	 *
+	 * There are three sources of messages:  compiler messages, API Extractor messages, and TSDoc messages.
+	 */
+	"messages": {
+		/**
+		 * Configures handling of diagnostic messages reported by the TypeScript compiler engine while analyzing
+		 * the input .d.ts files.
+		 *
+		 * TypeScript message identifiers start with "TS" followed by an integer.  For example: "TS2551"
+		 *
+		 * DEFAULT VALUE:  A single "default" entry with logLevel=warning.
+		 */
+		"compilerMessageReporting": {
+			/**
+			 * Configures the default routing for messages that don't match an explicit rule in this table.
+			 */
+			"default": {
+				/**
+				 * Specifies whether the message should be written to the the tool's output log.  Note that
+				 * the "addToApiReportFile" property may supersede this option.
+				 *
+				 * Possible values: "error", "warning", "none"
+				 *
+				 * Errors cause the build to fail and return a nonzero exit code.  Warnings cause a production build fail
+				 * and return a nonzero exit code.  For a non-production build (e.g. when "api-extractor run" includes
+				 * the "--local" option), the warning is displayed but the build will not fail.
+				 *
+				 * DEFAULT VALUE: "warning"
+				 */
+				"logLevel": "error"
+				/**
+				 * When addToApiReportFile is true:  If API Extractor is configured to write an API report file (.api.md),
+				 * then the message will be written inside that file; otherwise, the message is instead logged according to
+				 * the "logLevel" option.
+				 *
+				 * DEFAULT VALUE: false
+				 */
+				// "addToApiReportFile": false
+			}
+			// "TS2551": {
+			//   "logLevel": "warning",
+			//   "addToApiReportFile": true
+			// },
+			//
+			// . . .
+		},
+		/**
+		 * Configures handling of messages reported by API Extractor during its analysis.
+		 *
+		 * API Extractor message identifiers start with "ae-".  For example: "ae-extra-release-tag"
+		 *
+		 * DEFAULT VALUE: See api-extractor-defaults.json for the complete table of extractorMessageReporting mappings
+		 */
+		"extractorMessageReporting": {
+			"default": {
+				"logLevel": "error"
+			},
+			"ae-internal-missing-underscore": {
+				"logLevel": "none",
+				"addToApiReportFile": false
+			},
+			"ae-forgotten-export": {
+				"logLevel": "error",
+				"addToApiReportFile": false
+			},
+			"ae-wrong-input-file-type": {
+				"logLevel": "none"
+			}
+			// "ae-extra-release-tag": {
+			//   "logLevel": "warning",
+			//   "addToApiReportFile": true
+			// },
+			//
+			// . . .
+		},
+		/**
+		 * Configures handling of messages reported by the TSDoc parser when analyzing code comments.
+		 *
+		 * TSDoc message identifiers start with "tsdoc-".  For example: "tsdoc-link-tag-unescaped-text"
+		 *
+		 * DEFAULT VALUE:  A single "default" entry with logLevel=warning.
+		 */
+		"tsdocMessageReporting": {
+			"default": {
+				"logLevel": "error"
+				// "addToApiReportFile": false
+			}
+			// "tsdoc-link-tag-unescaped-text": {
+			//   "logLevel": "warning",
+			//   "addToApiReportFile": true
+			// },
+			//
+			// . . .
+		}
+	}
+}

internal/config/package.json

@@ -0,0 +1,15 @@
+{
+	"name": "config",
+	"version": "0.0.0",
+	"main": "index.js",
+	"license": "SEE LICENSE IN LICENSE.md",
+	"private": true,
+	"devDependencies": {
+		"@jest/expect-utils": "^30.0.5",
+		"@peculiar/webcrypto": "^1.5.0",
+		"jest-matcher-utils": "^30.0.5",
+		"lazyrepo": "0.0.0-alpha.27",
+		"vitest": "^5.0.0",
+		"vitest-canvas-mock": "^1.1.3"
+	}
+}

internal/config/tsconfig.base.json

@@ -0,0 +1,37 @@
+{
+	"$schema": "https://json.schemastore.org/tsconfig",
+	"display": "Default",
+	"compilerOptions": {
+		"composite": true,
+		"declaration": true,
+		"declarationMap": true,
+		"emitDeclarationOnly": true,
+		"allowSyntheticDefaultImports": true,
+		"esModuleInterop": true,
+		"forceConsistentCasingInFileNames": true,
+		"importHelpers": true,
+		"resolveJsonModule": true,
+		"incremental": true,
+		"jsx": "react-jsx",
+		"jsxImportSource": "react",
+		"lib": ["DOM", "DOM.Iterable", "ESNext"],
+		"module": "esnext",
+		"target": "esnext",
+		"moduleResolution": "bundler",
+		"noFallthroughCasesInSwitch": true,
+		"noImplicitAny": true,
+		"noImplicitReturns": true,
+		"noUncheckedSideEffectImports": false,
+		"noUnusedLocals": false,
+		"noUnusedParameters": false,
+		"skipLibCheck": true,
+		"strict": true,
+		"strictFunctionTypes": true,
+		"strictNullChecks": true,
+		"useDefineForClassFields": true,
+		"noImplicitOverride": true,
+		"experimentalDecorators": true,
+		"types": ["node", "vitest/globals"]
+	},
+	"exclude": ["node_modules"]
+}

internal/config/tsconfig.json

@@ -0,0 +1,6 @@
+{
+	"extends": "./tsconfig.base.json",
+	"include": ["vitest"],
+	"exclude": ["node_modules", ".tsbuild*"],
+	"compilerOptions": { "outDir": "./.tsbuild", "rootDir": "." }
+}

internal/config/vitest/node-preset.ts

@@ -0,0 +1,51 @@
+import path from 'path'
+import { defineConfig } from 'vitest/config'
+
+const svgTransform = {
+	name: 'svg-transform',
+	transform(_code: string, id: string) {
+		if (id.endsWith('.svg')) {
+			return {
+				code: 'export default {};',
+				map: null,
+			}
+		}
+		return undefined
+	},
+}
+
+export default defineConfig({
+	plugins: [svgTransform],
+	test: {
+		globals: true,
+		environment: 'jsdom',
+		// Persist transformed modules to node_modules/.vitest-cache so reruns skip re-transforming.
+		// Only helps a warm cache: a cold run (fresh clone, cleared node_modules) pays full price.
+		fsModuleCache: true,
+		// Worker threads start much faster than forked processes. Projects needing real process
+		// isolation (e.g. sync-worker, which passes node flags via execArgv) override this.
+		pool: 'threads',
+		setupFiles: [path.resolve(__dirname, './setup.ts')],
+		include: ['src/**/*.{test,spec}.{js,ts,jsx,tsx}'],
+		exclude: [
+			'**/test/__fixtures__/**',
+			'**/node_modules/**',
+			'**/dist/**',
+			'**/.tsbuild/**',
+			'**/.tsbuild-dev/**',
+			'**/.tsbuild-pub/**',
+		],
+		coverage: {
+			include: ['src/**/*.{ts,tsx}'],
+			exclude: ['**/*.test.*', '**/*.spec.*', '**/test/**', '**/__tests__/**'],
+		},
+	},
+	resolve: {
+		alias: {
+			'~': path.resolve(process.cwd(), 'src'),
+		},
+	},
+	ssr: {
+		noExternal: ['@tiptap/react'],
+	},
+})

internal/config/vitest/setup.ts

@@ -0,0 +1,143 @@
+import { equals, getObjectSubset, iterableEquality, subsetEquality } from '@jest/expect-utils'
+import {
+	matcherHint,
+	printDiffOrStringify,
+	printExpected,
+	printReceived,
+	stringify,
+} from 'jest-matcher-utils'
+
+if (typeof window !== 'undefined') {
+	await import('vitest-canvas-mock')
+}
+
+// Crypto fallback for environments without a native WebCrypto implementation (e.g. the ai package).
+// jsdom provides window.crypto with subtle crypto, so this only kicks in elsewhere.
+if (typeof globalThis.crypto === 'undefined') {
+	// eslint-disable-next-line @typescript-eslint/no-require-imports
+	const { Crypto } = require('@peculiar/webcrypto')
+	globalThis.crypto = new Crypto()
+}
+
+// Image.decode polyfill - this should be handled by individual package setups,
+// but including it here as a fallback
+if (typeof HTMLImageElement !== 'undefined') {
+	if (!HTMLImageElement.prototype.decode) {
+		HTMLImageElement.prototype.decode = function () {
+			return Promise.resolve()
+		}
+	}
+}
+
+// Path2D polyfills
+if (typeof Path2D !== 'undefined' && typeof Path2D.prototype.roundRect !== 'function') {
+	Path2D.prototype.roundRect = function (x, y, w, h, _) {
+		this.rect(x, y, w, h)
+	}
+}
+
+// CSS.supports polyfill for tests that use color spaces (e.g., highlight shapes)
+if (typeof CSS === 'undefined') {
+	;(global as any).CSS = {}
+}
+if (typeof CSS.supports === 'undefined') {
+	CSS.supports = () => false
+}
+
+// Pointer capture polyfill. jsdom implements the PointerEvent constructor but not the pointer
+// capture model, so setPointerCapture/releasePointerCapture/hasPointerCapture are missing
+// (https://github.com/jsdom/jsdom/pull/2666). Our canvas event handlers capture the pointer on
+// pointerdown/up, so stub them out to avoid throwing.
+if (typeof Element !== 'undefined') {
+	Element.prototype.setPointerCapture ??= function () {
+		// noop
+	}
+	Element.prototype.releasePointerCapture ??= function () {
+		// noop
+	}
+	Element.prototype.hasPointerCapture ??= function () {
+		return false
+	}
+}
+
+// Captured before any test file installs fake timers.
+const realSetTimeout = globalThis.setTimeout
+const realSetImmediate = globalThis.setImmediate
+
+// Drain deferred React work before vitest tears down jsdom: exportToSvg unmounts its root in a
+// setTimeout(0) and every react-dom commit schedules a setImmediate that reads `window.event`.
+// Landing after teardown, those throw "window is not defined" as an unhandled error (flaky CI).
+if (typeof window !== 'undefined') {
+	afterAll(async () => {
+		// two passes: pass 1 fires pending timeouts and the setImmediate they enqueue; pass 2 covers
+		// the scheduler re-arming itself when it yields mid-work
+		for (let i = 0; i < 2; i++) {
+			await new Promise((resolve) => realSetTimeout(resolve, 0))
+			await new Promise((resolve) => realSetImmediate(resolve))
+		}
+	})
+}
+
+function convertNumbersInObject(obj: any, roundToNearest: number): any {
+	if (!obj) return obj
+	if (Array.isArray(obj)) {
+		return obj.map((x) => convertNumbersInObject(x, roundToNearest))
+	}
+	if (typeof obj === 'number') {
+		// || 0 to avoid -0
+		return Math.round(obj / roundToNearest) * roundToNearest || 0
+	}
+	if (typeof obj !== 'object') {
+		return obj
+	}
+
+	const r: any = {
+		__converted: true,
+	}
+
+	for (const k of Object.keys(obj)) {
+		r[k] = convertNumbersInObject(obj[k], roundToNearest)
+	}
+
+	return r
+}
+
+expect.extend({
+	toCloselyMatchObject(actual: any, expected: any, roundToNearest = 0.0001) {
+		const matcherName = 'toCloselyMatchObject'
+		const options = {
+			isNot: this.isNot,
+			promise: this.promise,
+		}
+
+		const EXPECTED_LABEL = 'Expected'
+		const RECEIVED_LABEL = 'Received'
+
+		const newActualObj = convertNumbersInObject(actual, roundToNearest)
+
+		const newExpectedObj = convertNumbersInObject(expected, roundToNearest)
+
+		const pass = equals(newActualObj, newExpectedObj, [iterableEquality, subsetEquality])
+
+		const message = pass
+			? () =>
+					matcherHint(matcherName, undefined, undefined, options) +
+					'\n\n' +
+					`Expected: not ${printExpected(expected)}` +
+					(stringify(expected) !== stringify(actual)
+						? `\nReceived:     ${printReceived(actual)}`
+						: '')
+			: () =>
+					matcherHint(matcherName, undefined, undefined, options) +
+					'\n\n' +
+					printDiffOrStringify(
+						expected,
+						getObjectSubset(actual, expected),
+						EXPECTED_LABEL,
+						RECEIVED_LABEL,
+						true
+					)
+
+		return { message, pass }
+	},
+})