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youtubei.js / Helpers / Memo

Class: Memo

Defined in: src/parser/helpers.ts:502

Extends

  • Map<string, YTNode[]>

Constructors

Constructor

new Memo(entries?): Memo

Defined in: node_modules/typescript/lib/lib.es2015.collection.d.ts:50

Parameters

entries?

readonly readonly [string, YTNode[]][] | null

Returns

Memo

Inherited from

Map<string, YTNode[]>.constructor

Constructor

new Memo(iterable?): Memo

Defined in: node_modules/typescript/lib/lib.es2015.collection.d.ts:49

Parameters

iterable?

Iterable<readonly [string, YTNode[]]> | null

Returns

Memo

Inherited from

Map<string, YTNode[]>.constructor

Properties

[toStringTag]

readonly [toStringTag]: string

Defined in: node_modules/typescript/lib/lib.es2015.symbol.wellknown.d.ts:137

Inherited from

Map.[toStringTag]


size

readonly size: number

Defined in: node_modules/typescript/lib/lib.es2015.collection.d.ts:45

Returns

the number of elements in the Map.

Inherited from

Map.size


[species]

readonly static [species]: MapConstructor

Defined in: node_modules/typescript/lib/lib.es2015.symbol.wellknown.d.ts:319

Inherited from

Map.[species]

Methods

[iterator]()

[iterator](): IterableIterator<[string, YTNode[]]>

Defined in: node_modules/typescript/lib/lib.es2015.iterable.d.ts:119

Returns an iterable of entries in the map.

Returns

IterableIterator<[string, YTNode[]]>

Inherited from

Map.[iterator]


clear()

clear(): void

Defined in: node_modules/typescript/lib/lib.es2015.collection.d.ts:20

Returns

void

Inherited from

Map.clear


delete()

delete(key): boolean

Defined in: node_modules/typescript/lib/lib.es2015.collection.d.ts:24

Parameters

key

string

Returns

boolean

true if an element in the Map existed and has been removed, or false if the element does not exist.

Inherited from

Map.delete


entries()

entries(): IterableIterator<[string, YTNode[]]>

Defined in: node_modules/typescript/lib/lib.es2015.iterable.d.ts:124

Returns an iterable of key, value pairs for every entry in the map.

Returns

IterableIterator<[string, YTNode[]]>

Inherited from

Map.entries


forEach()

forEach(callbackfn, thisArg?): void

Defined in: node_modules/typescript/lib/lib.es2015.collection.d.ts:28

Executes a provided function once per each key/value pair in the Map, in insertion order.

Parameters

callbackfn

(value, key, map) => void

thisArg?

any

Returns

void

Inherited from

Map.forEach


get()

get(key): YTNode[] | undefined

Defined in: node_modules/typescript/lib/lib.es2015.collection.d.ts:33

Returns a specified element from the Map object. If the value that is associated to the provided key is an object, then you will get a reference to that object and any change made to that object will effectively modify it inside the Map.

Parameters

key

string

Returns

YTNode[] | undefined

Returns the element associated with the specified key. If no element is associated with the specified key, undefined is returned.

Inherited from

Map.get


getType()

Call Signature

getType<T, K>(types): ObservedArray<InstanceType<K[number]>>

Defined in: src/parser/helpers.ts:503

Type Parameters
T

T extends YTNode

K

K extends YTNodeConstructor<T>[]

Parameters
types

K

Returns

ObservedArray<InstanceType<K[number]>>

Call Signature

getType<T, K>(...types): ObservedArray<InstanceType<K[number]>>

Defined in: src/parser/helpers.ts:504

Type Parameters
T

T extends YTNode

K

K extends YTNodeConstructor<T>[]

Parameters
types

...K

Returns

ObservedArray<InstanceType<K[number]>>


has()

has(key): boolean

Defined in: node_modules/typescript/lib/lib.es2015.collection.d.ts:37

Parameters

key

string

Returns

boolean

boolean indicating whether an element with the specified key exists or not.

Inherited from

Map.has


keys()

keys(): IterableIterator<string>

Defined in: node_modules/typescript/lib/lib.es2015.iterable.d.ts:129

Returns an iterable of keys in the map

Returns

IterableIterator<string>

Inherited from

Map.keys


set()

set(key, value): this

Defined in: node_modules/typescript/lib/lib.es2015.collection.d.ts:41

Adds a new element with a specified key and value to the Map. If an element with the same key already exists, the element will be updated.

Parameters

key

string

value

YTNode[]

Returns

this

Inherited from

Map.set


values()

values(): IterableIterator<YTNode[]>

Defined in: node_modules/typescript/lib/lib.es2015.iterable.d.ts:134

Returns an iterable of values in the map

Returns

IterableIterator<YTNode[]>

Inherited from

Map.values


groupBy()

static groupBy<K, T>(items, keySelector): Map<K, T[]>

Defined in: node_modules/typescript/lib/lib.esnext.collection.d.ts:25

Groups members of an iterable according to the return value of the passed callback.

Type Parameters

K

K

T

T

Parameters

items

Iterable<T>

An iterable.

keySelector

(item, index) => K

A callback which will be invoked for each item in items.

Returns

Map<K, T[]>

Inherited from

Map.groupBy

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Last Updated: 10/12/25, 3:23 PM