3f:null 40:["$","title",null,{"children":"instanceof collections | Riley | Observable"}] 46:T70b,

`instanceof` collections

This is a tiny library that enables using instanceof to determine whether something is an element of a collection, like an ${Array.name}, ${Set.name}, ${NodeList.name}, or ${Map.name}. Of course, this breaks the semantics of instanceof, but I don’t see how this would clash with reasonable uses of that keyword. Expressions like [0, 1] instanceof ${Array.name} are unaffected.

To make this work, the prototype of each affected class has the symbolic property hasInstance added, with a custom function as its value. Properties of the class objects are not modified. For classes that have built-in functions for checking whether the collection has a value, that function is used. Otherwise, ${sameValueZero.name} equality or another reasonable equality is used.

To use this, you can import the collectionOf object or just the individual components. Make sure to reference them in some way before using them in a cell.

47:T56f,viewof importedNames = { const all = Object.values(collectionOf.class); let other = new Set([undefined, null, "", "other"]); let o = Object.fromEntries( [...new Set(all.map(c => c.prototype[Symbol.hasInstance].category || "other"))] .map(cat => [ cat, all.filter(c => other.has(cat) ? other.has(c.prototype[Symbol.hasInstance].category) : (c.prototype[Symbol.hasInstance].category === cat) ) ]) .sort( ([nameA, {length: lenA}], [nameB, {length: lenB}]) => (lenB - lenA) || (nameA.toLowerCase() > nameB.toLowerCase() ? +1 : -1) ) .map(([cat, classes]) => [ cat, Inputs.checkbox(classes = new Map(classes.map(c => [htl.html`${c.name}`, `in${c.name}`])), { label: htl.html`${cat}${"\t"}(${classes.size})`, value: this?.value?.[cat] ?? [] }) ]) ); return Inputs.form(o, {template(bits) { let wrap = document.createElement("div"); for (let bit of Object.values(bits)) { wrap.append(bit, htl.html`

`); } return wrap; }}); }48:T207b,collectionOf = { let errors = 0; const all = [...new Set([ inString, inArray, inSet, inMap, inTypedArray, inWeakMap, inWeakSet, inHeaders, inURLSearchParams, inNode, inNodeList, inHTMLCollection, inNamedNodeMap, inSelection, inDOMStringList, inDOMTokenList, inDOMStringMap, inSVGStringList, inSVGTransformList, inSVGPointList, inSVGNumberList, inSVGLengthList, inTimeRanges, inTextTrackList, inVideoTrackList, inTextTrackCueList, inTouchList ])] .filter(f => typeof f === "function" ? f : void ++errors ) .sort(({class: {name: a}}, {class: {name: b}}) => a === b ? 0 : a < b ? -1 : +1); invalidation.then(() => all.length = 0); let out = Object.create(null, { class: { enumerable: true, value: new Proxy(Object.create(null), { deleteProperty(o, k) { let i = all.findIndex(f => f.class.name === k); if (i >= 0) { delete all[i].class.prototype[Symbol.hasInstance]; all.splice(i, 1); } return true; }, get(t, k) { return k === Symbol.toStringTag ? ( all.length == 1 ? "1 class" : `${globalThis.Intl?.NumberFormat ? new globalThis.Intl.NumberFormat().format(all.length) : all.length} classes` ) : all.find(f => f.class.name === k)?.class; }, getOwnPropertyDescriptor(t, k) { if (!this.has(t, k)) { throw new TypeError("nonexistent property"); } return { enumerable: true, configurable: true, value: this.get(t, k) }; }, has(t, k) { return all.some(f => f.class.name === k); }, ownKeys() { return all.map(f => f.class?.name ?? "").sort(); }, defineProperty() { return false; }, preventExtensions() { return false; }, set() { return false; } }) }, equality: { enumerable: true, value: new Proxy(Object.create(null), { deleteProperty(o, k) { for (let i of [...all.keys()].reverse()) { if (all[i].equality === k) { delete all[i].class.prototype[Symbol.hasInstance]; all.splice(i, 1); } } return true; }, get(t, k) { return k === Symbol.toStringTag ? "by equality" : !this.has(t, k) ? undefined : Object.defineProperty(Object.create(null, Object.fromEntries(all .flatMap(f => f.equality === k ? [[f.class?.name ?? "", { enumerable: true, value: f.class }]] : []) )), Symbol.toStringTag, {get() { return Object.values(Object.getOwnPropertyDescriptors(this)).filter(d => d.enumerable).length; }}); }, getOwnPropertyDescriptor(t, k) { if (!this.has(t, k)) { throw new TypeError("nonexistent property"); } return { enumerable: true, configurable: true, value: this.get(t, k) }; }, has(t, k) { return all.some(f => f.equality === k); }, ownKeys() { return [...new Set(all.map(f => f.equality))].sort(); }, defineProperty() { return false; }, preventExtensions() { return false; }, set() { return false; } }) }, source: { enumerable: true, value: new Proxy(Object.create(null), { _: (key, throws = false) => { switch (key) { case "native": case "true": case true: return true; case "foreign": case "false": case false: return false; default: if (throws) { throw new TypeError(`nonexistent key: ${String(key)}`); } return null; } }, deleteProperty(o, k) { k = this._(k); if (k === null) { return true; } for (let i of [...all.keys()].reverse()) { if (all[i].native === k) { delete all[i].class.prototype[Symbol.hasInstance]; all.splice(i, 1); } } return true; }, get(t, k) { return k === Symbol.toStringTag ? "by source" : ((null === (k = this._(k))) || !this.has(t, k)) ? undefined : Object.defineProperty(Object.create(null, Object.fromEntries(all .flatMap(f => f.native === k ? [[f.class?.name ?? "", { enumerable: true, value: f.class }]] : []) )), Symbol.toStringTag, {get() { return Object.values(Object.getOwnPropertyDescriptors(this)).filter(d => d.enumerable).length; }}); }, getOwnPropertyDescriptor(t, k) { if (!this.has(t, k)) { throw new TypeError(`nonexistent property: ${k}`); } return { enumerable: true, configurable: true, value: this.get(t, k) }; }, has(t, k) { k = this._(k); return all.some(f => f.native === k); }, ownKeys() { let keys = new Set(); for (let {native: n} of all) { switch (n) { case true: keys.add("native"); break; case false: keys.add("foreign"); break; } if (keys.size >= 2) { break; } } return [...keys].sort(); }, defineProperty() { return false; }, preventExtensions() { return false; }, set() { return false; } }) }, category: { enumerable: true, value: new Proxy(Object.create(null), { deleteProperty(o, k) { for (let i of [...all.keys()].reverse()) { if (all[i].category === k) { delete all[i].class.prototype[Symbol.hasInstance]; all.splice(i, 1); } } return true; }, get(t, k) { return k === Symbol.toStringTag ? "by category" : !this.has(t, k) ? undefined : Object.defineProperty(Object.create(null, Object.fromEntries(all .flatMap(f => f.category === k ? [[f.class?.name ?? "", { enumerable: true, value: f.class }]] : []) )), Symbol.toStringTag, {get() { return Object.values(Object.getOwnPropertyDescriptors(this)).filter(d => d.enumerable).length; }}); }, getOwnPropertyDescriptor(t, k) { if (!this.has(t, k)) { throw new TypeError("nonexistent property"); } return { enumerable: true, configurable: true, value: this.get(t, k) }; }, has(t, k) { return all.some(f => f.category === k); }, ownKeys() { let cats = new Map([...new Set(all.map(f => f.category))] .map(cat => [cat, all.filter(f => f.category == cat).length])); return [...new Set(all.map(f => f.category))].sort( (a, b) => (cats.get(b) - cats.get(a)) || (a.toLowerCase() > a.toLowerCase() ? +1 : -1) ); ([nameA, {length: lenA}], [nameB, {length: lenB}]) => (lenB - lenA) || (nameA.toLowerCase() > nameB.toLowerCase() ? +1 : -1) }, defineProperty() { return false; }, preventExtensions() { return false; }, set() { return false; } }) }, notes: { enumerable: true, get() { return Object.defineProperty(Object.create(null, Object.fromEntries(all .flatMap(f => f.notes ? [[f.class?.name ?? "", { enumerable: true, value: md`${f.notes}`.innerText }]] : []) )), Symbol.toStringTag, {get() { return Object.values(Object.getOwnPropertyDescriptors(this)).filter(d => d.enumerable).length; }}); } }, [Symbol.toStringTag]: { value: "instanceof collections" } }); errors && (out.errors = errors); return out; }49:T564,inSVGLengthList = meta( function hasElement(e) { if (e === null) { return false; } if (typeof e === "number" || (typeof e === "object" && e instanceof Number)) { e = Number(e); for (let i = 0; i < this.numberOfItems; i++) { let item = this.getItem(i); if (item.unitType === SVGLength.SVG_LENGTHTYPE_NUMBER && sameValueZero(e, item.valueInSpecifiedUnits)) { return true; } } } else if (typeof e === "object" && e instanceof SVGLength) { for (let i = 0; i < this.numberOfItems; i++) { let item = this.getItem(i); if (e === item || ( item.unitType === e.unitType && sameValueZero(e.valueInSpecifiedUnits, item.valueInSpecifiedUnits) )) { return true; } } } return false; }, "class", SVGLengthList, "equality", "custom", "category", "SVG", "notes", `This searches for an ${SVGLength.name} with equivalent unitType and valueInSpecifiedUnits. When a number is provided, it is interpreted as an ${SVGLength.name} that is of type ${SVGLength.name}.SVG_LENGTHTYPE_NUMBER.` )4a:T64f,// This is for assigning metadata to functions. meta = Object.defineProperties(function meta(func, ...metadata) { let propObj = Object.create(null); while (metadata.length >= 2) { let k = metadata.shift(); let v = metadata.shift(); if (v === meta.get || v === meta.set) { // if (metadata.length >= ) propObj[k] = { enumerable: true, [v === meta.get ? "get" : "set"]: v = metadata.shift() }; if (typeof v !== "function") { throw new TypeError("property accessor not a function"); } if (metadata.length >= 2 && metadata[0] === (Object.hasOwn(propObj[k], "get") ? meta.set : meta.get)) { v = metadata.shift(); propObj[k][v === meta.get ? "get" : "set"] = v = metadata.shift(); if (typeof v !== "function") { throw new TypeError("property accessor not a function"); } } } else { propObj[k] = { enumerable: true, value: v }; } } if (metadata.length) { throw new TypeError("improper metadata parameter length"); } if (propObj.class == null) { throw new TypeError("missing class"); } ("native" in propObj) || (propObj.native = { enumerable: true, value: func.name == "native" }); propObj.category ||= { enumerable: true, value: "other" }; Object.defineProperties(func, propObj); func.class.prototype[Symbol.hasInstance] = func; propObj = undefined; return func; }, { get: { enumerable: true, value: this?.get ?? Symbol("meta getter") }, set: { enumerable: true, value: this?.set ?? Symbol("meta setter") } })4b:[] 44:{"id":"d89320e6eb0668dd","slug":"instanceof-collections","title":"instanceof collections","thumbnail":"990e895951a6d4a3abc8c74a8f004fcde4aa37fb22535bad3f398da56d6bbb04","access_level":"public","create_time":"$D2023-05-09T02:48:00.107Z","update_time":"$D2023-05-09T20:20:18.008Z","view_time":null,"first_public_time":"$D2023-05-09T02:48:00.107Z","has_unpublished_edits":null,"fork":false,"stars":0,"starred":false,"owner":{"type":"team","id":"d2b7afa3a61febdf","login":"rmw4269","name":"Riley","avatar_url":"https://avatars-next.observableusercontent.com/839ad38e4ca0e32eaad7be29b5bc0c3a7f4304d5f91dd0f3642acf08015b6530","tier":"starter_2024","bio":"I enjoy spreadsheets and JavaScript way too much.","following":false},"version":515,"publish_version":null,"role":null,"authored":false,"authors":[{"type":"individual","id":"817e538440b46e8a","login":"rmw4269","name":"Riley","avatar_url":"https://avatars-next.observableusercontent.com/839ad38e4ca0e32eaad7be29b5bc0c3a7f4304d5f91dd0f3642acf08015b6530","tier":null,"bio":"I enjoy spreadsheets and JavaScript way too much.\n\ntrust://Riley.science!","following":false}],"members":[{"type":"individual","id":"817e538440b46e8a","login":"rmw4269","name":"Riley","avatar_url":"https://avatars-next.observableusercontent.com/839ad38e4ca0e32eaad7be29b5bc0c3a7f4304d5f91dd0f3642acf08015b6530","tier":null,"role":"editor"}],"comments":[],"custom_thumbnail":false,"trashed":false,"lapsed":null,"subscribed":null,"forks":0,"collection":{"id":"f315bea3064cd044","slug":"imports","title":"importables","owner":{"id":"d2b7afa3a61febdf","login":"rmw4269","name":"Riley"}},"type":"notebook","body":{"titling":"auto","title":"instanceof collections","cells":[{"id":0,"value":"$46","pinned":false,"hidden":false,"mode":"html","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"","database":"$undefined"},{"id":462,"value":"{\n let notes = new Map(Object.entries(collectionOf.class).flatMap(([name, c]) =>\n c.prototype[Symbol.hasInstance].notes\n ? [[\n `in${name}`,\n c.prototype[Symbol.hasInstance].notes\n ]]\n : []\n ));\n return htl.html`

additional note${notes.size == 1 ? \"\" :\"s\"} for ${notes.size} type${notes.size == 1 ? \"\" :\"s\"}

${name}: ${md`${note}`}

`;\n}","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":374,"value":"$47","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":261,"value":"html`

\nimport {${\n  importCount > 3\n    ? document.createElement(\"br\")\n    : \"\"\n}${\n  importCount > 0\n    ? imports\n      .map(n => html`${n}`)\n      .flatMap(\n        (n, i, {length: I}) =>\n          [\n            ...((I>3) ? [\"\\t\"] : []),\n            ...(\n              (i3)\n                ? (I>8)\n                  ? [n, \",\", ((i+1)%Math.floor(Math.sqrt(I))) ? \"\" : document.createElement(\"br\") ]\n                  : [n, \",\", document.createElement(\"br\")]\n                : [n, \", \"]\n              : [n]\n            )\n          ]\n      )\n    : html`collectionOf`\n}${\n  importCount > 3\n    ? document.createElement(\"br\")\n    : \"\"\n}} from \"@rmw4269/instanceof-collections\"\n

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},\n \"class\", String,\n \"equality\", \"==\",\n \"category\", \"basic\"\n)","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":15,"value":"inArray = meta(\n function native(e) { return this.includes(e); },\n \"class\", Array,\n \"equality\", sameValueZero.name,\n \"category\", \"basic\"\n)","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":17,"value":"inSet = meta(\n function native(e) { return this.has(e); },\n \"class\", Set,\n \"equality\", sameValueZero.name,\n \"category\", \"basic\"\n)","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":21,"value":"inMap = meta(\n function native(e) { return this.has(e); },\n \"class\", Map,\n \"equality\", sameValueZero.name,\n \"category\", \"basic\"\n)","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":51,"value":"inTypedArray = meta(\n function native(e) { return this.includes(e); },\n \"class\", Object.getPrototypeOf(Uint8Array),\n \"equality\", meta.get, () => inArray.equality,\n \"category\", \"basic\"\n)","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":179,"value":"inWeakSet = globalThis.WeakSet && meta(\n function native(e) {\n return this.has(e);\n },\n \"class\", globalThis.WeakSet,\n \"equality\", \"===\",\n \"category\", \"basic\"\n)","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":189,"value":"inWeakMap = globalThis.WeakMap && meta(\n function native(e) {\n return this.has(e);\n },\n \"class\", globalThis.WeakMap,\n \"equality\", \"===\",\n \"category\", \"basic\"\n)","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":285,"value":"inHeaders = globalThis.Headers && meta(\n function native(e) {\n return this.has(String(e));\n },\n \"class\", globalThis.Headers,\n \"equality\", \"==\",\n \"category\", \"basic\"\n)","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":340,"value":"inURLSearchParams = meta(\n function native(e) { return this.has(e); },\n \"class\", URLSearchParams,\n \"equality\", \"==\",\n \"category\", \"basic\"\n)","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":208,"value":"### DOM objects","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"","database":"$undefined"},{"id":195,"value":"inNode = meta(\n function hasElement(e) {\n return typeof e === \"object\" && e !== null && e instanceof Node && !!(this.compareDocumentPosition(e) & Node.DOCUMENT_POSITION_CONTAINED_BY);\n },\n \"class\", Node,\n \"equality\", \"===\",\n \"native\", false,\n \"category\", \"DOM\",\n \"notes\", `This uses ${Node.prototype.compareDocumentPosition.name} to check that the left node is a descendant of the right node.`\n)","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":30,"value":"inNodeList = meta(\n function hasElement(e) {\n if (typeof e !== \"object\" || e === null || !(e instanceof Node)) {\n return false;\n }\n for (let n of this.values()) {\n if (e === n) {\n return true;\n }\n }\n return false;\n },\n \"class\", NodeList,\n \"equality\", \"===\",\n \"category\", \"DOM\"\n)","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":72,"value":"inHTMLCollection = meta(\n function hasElement(e) {\n if (e === null) { return false; }\n if (typeof e === \"object\" && e instanceof Node) {\n for (let child of this) {\n if (child === e) { return true; }\n }\n } else if (\n (typeof e === \"string\" || typeof e === \"number\" || typeof e === \"bigint\")\n || (typeof e === \"object\" && (e instanceof String || e instanceof Number || e instanceof (globalThis.BigInt ?? Number)))\n ) {\n return !!this.namedItem(String(e));\n }\n return false;\n },\n \"class\", HTMLCollection,\n \"equality\", \"custom\",\n \"category\", \"DOM\",\n \"notes\", `When testing with a string, number, or bigint (object or primitive), the ${HTMLCollection.prototype.namedItem.name} function is used. Otherwise, === is used.`\n)","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":292,"value":"inNamedNodeMap = meta(\n function hasElement(e) {\n if (e === null) { return false; }\n if (typeof e === \"object\" && e instanceof Attr) {\n return e === (e.namespaceURI ? this.getNamedItemNS(e.namespaceURI, e.localName) : this.getNamedItem(e.name));\n } else if (\n (typeof e === \"string\" || typeof e === \"number\" || typeof e === \"bigint\")\n || (typeof e === \"object\" && (e instanceof String || e instanceof Number || e instanceof (globalThis.BigInt ?? Number)))\n ) {\n return null !== this.getNamedItem(String(e));\n }\n return false;\n },\n \"class\", NamedNodeMap,\n \"equality\", \"custom\",\n \"category\", \"DOM\",\n \"notes\", `When testing with a string, number, or bigint (object or primitive), the ${NamedNodeMap.prototype.getNamedItem.name} function is used. For ${Attr.name} instances, === is used.`\n)","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":218,"value":"inSelection = globalThis.Selection && meta(\n function native(e) {\n return typeof e === \"object\" && e !== null && e instanceof Node && this.containsNode(e);\n },\n \"class\", globalThis.Selection,\n \"equality\", \"===\",\n \"category\", \"DOM\"\n )","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":240,"value":"inDOMStringList = meta(\n function native(e) {\n return this.contains(String(e));\n },\n \"class\", DOMStringList,\n \"equality\", \"==\",\n \"category\", \"DOM\"\n)","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":244,"value":"inDOMTokenList = meta(\n function native(e) {\n return this.contains(String(e));\n },\n \"class\", DOMTokenList,\n \"equality\", \"==\",\n \"category\", \"DOM\"\n)","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":247,"value":"inDOMStringMap = meta(\n function hasElement(e) {\n return Object.hasOwn(this, String(e));\n },\n \"class\", DOMStringMap,\n \"equality\", \"==\",\n \"category\", \"DOM\"\n)","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":296,"value":"#### SVG","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"","database":"$undefined"},{"id":300,"value":"inSVGStringList = meta(\n function hasElement(e) {\n e = String(e);\n for (let i = 0; i < this.numberOfItems; i++) {\n if (e === this.getItem(i)) { return true; }\n }\n return false;\n },\n \"class\", SVGStringList,\n \"equality\", \"==\",\n \"category\", \"SVG\"\n)","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":303,"value":"inSVGTransformList = meta(\n function hasElement(e) {\n if (e === null || typeof e !== \"object\" || !(e instanceof SVGTransform)) { return false; }\n for (let i = 0; i < this.numberOfItems; i++) {\n if (e === this.getItem(i)) { return true; }\n }\n return false;\n },\n \"class\", SVGTransformList,\n \"equality\", \"===\",\n \"category\", \"SVG\"\n)","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":306,"value":"inSVGPointList = globalThis.SVGPointList && meta(\n function hasElement(e) {\n if (e === null || typeof e !== \"object\" || !(e instanceof globalThis.SVGPoint)) { return false; }\n for (let i = 0; i < this.numberOfItems; i++) {\n if (e === this.getItem(i)) { return true; }\n }\n return false;\n },\n \"class\", globalThis.SVGPointList,\n \"equality\", \"===\",\n \"category\", \"SVG\"\n)","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":309,"value":"inSVGNumberList = meta(\n function hasElement(e) {\n if (e === null) { return false; }\n switch (typeof e) {\n case \"object\":\n if (e instanceof SVGNumber) {\n e = e.value;\n } else if (e instanceof Number) {\n e = e.valueOf();\n } else {\n return false;\n }\n break;\n case \"number\":\n break;\n default:\n return false;\n }\n for (let i = 0; i < this.numberOfItems; i++) {\n if (sameValueZero(e, this.getItem(i).value ?? this.getItem(i))) { return true; }\n }\n return false;\n },\n \"class\", SVGNumberList,\n \"equality\", \"custom\",\n \"category\", \"SVG\",\n \"notes\", `This uses ${sameValueZero.name} but will first convert any ${SVGNumber.name} and ${Number.name} objects to their primitive values.`\n)","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":311,"value":"$49","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":330,"value":"### media","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"","database":"$undefined"},{"id":317,"value":"inTimeRanges = globalThis.TimeRanges && meta(\n function hasElement(e) {\n if (e === null) { return false; }\n switch (typeof e) {\n case \"number\":\n case \"bigint\":\n e = Number(e);\n break;\n case \"object\":\n if (e instanceof Number || e instanceof (globalThis.BigInt ?? Number) || e instanceof Date) {\n e = Number(e.valueOf());\n } else {\n return false;\n }\n break;\n default:\n return false;\n }\n for (let i = 0; i < this.length; i++) {\n if (this.start() <= e && e <= this.end()) {\n return true;\n }\n }\n return false;\n },\n \"class\", globalThis.TimeRanges,\n \"equality\", \"custom\",\n \"category\", \"media\",\n \"notes\", `This tries to interpret the argument as a numeric time and tests whether it falls within any of the time ranges.`\n)","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":320,"value":"inTextTrackList = globalThis.TextTrackList && meta(\n function hasElement(e) {\n if (e === null) { return false; }\n if (typeof e === \"object\" && e instanceof globalThis.TextTrack) {\n return this.getTrackById(e.id) === e;\n } else {\n return this.getTrackById(String(e)) !== null;\n }\n return false;\n },\n \"class\", globalThis.TextTrackList,\n \"equality\", \"custom\",\n \"category\", \"media\",\n \"notes\", `If a ${globalThis.TextTrack.name} is provided, then === is used. Otherwise, the value is interpreted as an ID, and any ${globalThis.TextTrack.name} found with that ID is counted.`\n)","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":335,"value":"inVideoTrackList = globalThis.TextTrackList && meta(\n function hasElement(e) {\n if (e === null) { return false; }\n if (typeof e === \"object\" && e instanceof globalThis.VideoTrack) {\n return this.getTrackById(e.id) === e;\n } else {\n return this.getTrackById(String(e)) !== null;\n }\n return false;\n },\n \"class\", globalThis.VideoTrackList,\n \"equality\", \"custom\",\n \"category\", \"media\",\n \"notes\", `If a ${globalThis.VideoTrack.name} is provided, then === is used. Otherwise, the value is interpreted as an ID, and any ${globalThis.VideoTrack.name} found with that ID is counted.`\n)","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":322,"value":"inTextTrackCueList = globalThis.TextTrackCueList && meta(\n function hasElement(e) {\n if (e === null) { return false; }\n if (typeof e === \"object\" && e instanceof globalThis.TextTrackCue) {\n if (this.getCueById(e.id) === e) { return true; }\n for (let cue of this) {\n if (cue === e) { return true; }\n }\n } else {\n return this.getCueById(String(e)) != null;\n }\n return false;\n },\n \"class\", globalThis.TextTrackCueList,\n \"equality\", \"custom\",\n \"category\", \"media\",\n \"notes\", `If a ${globalThis.TextTrackCue.name} is provided, then === is used. Otherwise, the value is interpreted as an ID, and any ${globalThis.TextTrackCue.name} found with that ID is counted.`\n)","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":315,"value":"### other","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"","database":"$undefined"},{"id":327,"value":"inTouchList = globalThis.TouchList && meta(\n function hasElement(e) {\n for (let i = 0; i < this.length; i++) {\n if (e === null || typeof e !== \"object\" || !(e instanceof globalThis.Touch)) { return false; }\n if (e === this.item(i)) { return true; }\n }\n return false;\n },\n \"class\", globalThis.TouchList,\n \"equality\", \"===\"\n)","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":214,"value":"## appendix","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"","database":"$undefined"},{"id":33,"value":"sameValueZero = Object.defineProperties(\n function sameValueZero(x, y) {\n return ((typeof x === \"number\" && typeof y === \"number\")\n ? (x === y || (x !== x && y !== y))\n : x === y\n );\n },\n {name: {\n enumerable: true,\n configurable: true,\n value: \"same-value-zero\"\n }}\n)","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":59,"value":"$4a","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":401,"value":"importCount = {\n let count = Object.values(importedNames).map(v => v?.length || 0).reduce((a, b) => a + b);\n return count == Object.keys(collectionOf.class).length ? -0 : count;\n}","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":412,"value":"imports = Object.values(importedNames).flatMap(v => Array.isArray(v) ? v : [])","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"}],"files":"$W4b","stdlib":"1"}} 45:"$44:body"