--- title: "SymbolLayoutArray | JavaScript maps SDK" description: "Documentation for MapTiler SDK" --- > For AI agents: a documentation index is available at [/llms.txt](https://docs.maptiler.com/llms.txt). Markdown versions of all pages are available by appending .md to any URL. # Class SymbolLayoutArray #### Hierarchy ([View Summary](https://docs.maptiler.com/sdk-js/api-reference/hierarchy/#Externals.SymbolLayoutArray)) - [StructArrayLayout4i4ui4i24](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout4i4ui4i24/) - SymbolLayoutArray ##### Index ### Constructors[](#constructors) [constructor](#constructor) ### Properties[](#properties) [arrayBuffer](#arraybuffer) [bytesPerElement](#bytesperelement) [capacity](#capacity) [int16](#int16) [isTransferred](#istransferred) [length](#length) [members](#members) [uint16](#uint16) [uint8](#uint8) ### Methods[](#methods) [clear](#clear) [emplace](#emplace) [emplaceBack](#emplaceback) [freeBufferAfterUpload](#freebufferafterupload) [reserve](#reserve) [resize](#resize) [deserialize](#deserialize) [serialize](#serialize) ## Constructors[](#constructors-1) ### constructor[](#constructor) - new SymbolLayoutArray(): SymbolLayoutArray[](#constructorsymbollayoutarray) #### Returns SymbolLayoutArray Inherited from [StructArrayLayout4i4ui4i24](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout4i4ui4i24/).[constructor](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout4i4ui4i24/#constructor) ## Properties[](#properties-1) ### arrayBuffer[](#arraybuffer) arrayBuffer: ArrayBuffer Inherited from [StructArrayLayout4i4ui4i24](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout4i4ui4i24/).[arrayBuffer](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout4i4ui4i24/#arraybuffer) ### bytesPerElement[](#bytesperelement) bytesPerElement: number Inherited from [StructArrayLayout4i4ui4i24](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout4i4ui4i24/).[bytesPerElement](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout4i4ui4i24/#bytesperelement) ### capacity[](#capacity) capacity: number Inherited from [StructArrayLayout4i4ui4i24](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout4i4ui4i24/).[capacity](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout4i4ui4i24/#capacity) ### int16[](#int16) int16: Int16Array Inherited from [StructArrayLayout4i4ui4i24](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout4i4ui4i24/).[int16](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout4i4ui4i24/#int16) ### isTransferred[](#istransferred) isTransferred: boolean Inherited from [StructArrayLayout4i4ui4i24](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout4i4ui4i24/).[isTransferred](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout4i4ui4i24/#istransferred) ### length[](#length) length: number Inherited from [StructArrayLayout4i4ui4i24](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout4i4ui4i24/).[length](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout4i4ui4i24/#length) ### members[](#members) members: [StructArrayMember](https://docs.maptiler.com/sdk-js/api-reference/types/Externals.StructArrayMember/)\[\] Inherited from [StructArrayLayout4i4ui4i24](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout4i4ui4i24/).[members](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout4i4ui4i24/#members) ### uint16[](#uint16) uint16: Uint16Array Inherited from [StructArrayLayout4i4ui4i24](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout4i4ui4i24/).[uint16](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout4i4ui4i24/#uint16) ### uint8[](#uint8) uint8: Uint8Array Inherited from [StructArrayLayout4i4ui4i24](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout4i4ui4i24/).[uint8](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout4i4ui4i24/#uint8) ## Methods[](#methods-1) ### clear[](#clear) - clear(): void[](#clear-1) Resets the length of the array to 0 without de-allocating capacity. #### Returns void Inherited from [StructArrayLayout4i4ui4i24](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout4i4ui4i24/).[clear](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout4i4ui4i24/#clear) ### emplace[](#emplace) - emplace(     i: number,     v0: number,     v1: number,     v2: number,     v3: number,     v4: number,     v5: number,     v6: number,     v7: number,     v8: number,     v9: number,     v10: number,     v11: number, ): number[](#emplace-1) #### Parameters - i: number - v0: number - v1: number - v2: number - v3: number - v4: number - v5: number - v6: number - v7: number - v8: number - v9: number - v10: number - v11: number #### Returns number Inherited from [StructArrayLayout4i4ui4i24](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout4i4ui4i24/).[emplace](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout4i4ui4i24/#emplace) ### emplaceBack[](#emplaceback) - emplaceBack(     v0: number,     v1: number,     v2: number,     v3: number,     v4: number,     v5: number,     v6: number,     v7: number,     v8: number,     v9: number,     v10: number,     v11: number, ): number[](#emplaceback-1) #### Parameters - v0: number - v1: number - v2: number - v3: number - v4: number - v5: number - v6: number - v7: number - v8: number - v9: number - v10: number - v11: number #### Returns number Inherited from [StructArrayLayout4i4ui4i24](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout4i4ui4i24/).[emplaceBack](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout4i4ui4i24/#emplaceback) ### freeBufferAfterUpload[](#freebufferafterupload) - freeBufferAfterUpload(): void[](#freebufferafterupload-1) Replace the buffer with an empty one so typed views release the original ArrayBuffer for GC. #### Returns void Inherited from [StructArrayLayout4i4ui4i24](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout4i4ui4i24/).[freeBufferAfterUpload](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout4i4ui4i24/#freebufferafterupload) ### reserve[](#reserve) - reserve(n: number): void[](#reserve-1) Indicate a planned increase in size, so that any necessary allocation may be done once, ahead of time. #### Parameters - n: number The expected size of the array. #### Returns void Inherited from [StructArrayLayout4i4ui4i24](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout4i4ui4i24/).[reserve](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout4i4ui4i24/#reserve) ### resize[](#resize) - resize(n: number): void[](#resize-1) Resize the array. If `n` is greater than the current length then additional elements with undefined values are added. If `n` is less than the current length then the array will be reduced to the first `n` elements. #### Parameters - n: number The new size of the array. #### Returns void Inherited from [StructArrayLayout4i4ui4i24](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout4i4ui4i24/).[resize](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout4i4ui4i24/#resize) ### `Static`deserialize[](#deserialize) - deserialize(input: [SerializedStructArray](https://docs.maptiler.com/sdk-js/api-reference/types/Externals.SerializedStructArray/)): any[](#deserialize-1) #### Parameters - input: [SerializedStructArray](https://docs.maptiler.com/sdk-js/api-reference/types/Externals.SerializedStructArray/) #### Returns any Inherited from [StructArrayLayout4i4ui4i24](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout4i4ui4i24/).[deserialize](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout4i4ui4i24/#deserialize) ### `Static`serialize[](#serialize) - serialize(     array: [StructArray](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArray/),     transferables?: [Transferable](https://docs.maptiler.com/sdk-js/api-reference/types/Externals.Transferable/)\[\], ): [SerializedStructArray](https://docs.maptiler.com/sdk-js/api-reference/types/Externals.SerializedStructArray/)[](#serialize-1) Serialize a StructArray instance. Serializes both the raw data and the metadata needed to reconstruct the StructArray base class during deserialization. #### Parameters - array: [StructArray](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArray/) - `Optional`transferables: [Transferable](https://docs.maptiler.com/sdk-js/api-reference/types/Externals.Transferable/)\[\] #### Returns [SerializedStructArray](https://docs.maptiler.com/sdk-js/api-reference/types/Externals.SerializedStructArray/) Inherited from [StructArrayLayout4i4ui4i24](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout4i4ui4i24/).[serialize](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout4i4ui4i24/#serialize)