--- title: "SymbolInstanceArray | 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 SymbolInstanceArray #### Hierarchy ([View Summary](https://docs.maptiler.com/sdk-js/api-reference/hierarchy/#Externals.SymbolInstanceArray)) - [StructArrayLayout8i15ui1ul2f2ui64](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout8i15ui1ul2f2ui64/) - SymbolInstanceArray ##### Index ### Constructors[](#constructors) [constructor](#constructor) ### Properties[](#properties) [arrayBuffer](#arraybuffer) [bytesPerElement](#bytesperelement) [capacity](#capacity) [float32](#float32) [int16](#int16) [isTransferred](#istransferred) [length](#length) [members](#members) [uint16](#uint16) [uint32](#uint32) [uint8](#uint8) ### Methods[](#methods) [clear](#clear) [emplace](#emplace) [emplaceBack](#emplaceback) [freeBufferAfterUpload](#freebufferafterupload) [get](#get) [reserve](#reserve) [resize](#resize) [deserialize](#deserialize) [serialize](#serialize) ## Constructors[](#constructors-1) ### constructor[](#constructor) - new SymbolInstanceArray(): SymbolInstanceArray[](#constructorsymbolinstancearray) #### Returns SymbolInstanceArray Inherited from [StructArrayLayout8i15ui1ul2f2ui64](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout8i15ui1ul2f2ui64/).[constructor](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout8i15ui1ul2f2ui64/#constructor) ## Properties[](#properties-1) ### arrayBuffer[](#arraybuffer) arrayBuffer: ArrayBuffer Inherited from [StructArrayLayout8i15ui1ul2f2ui64](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout8i15ui1ul2f2ui64/).[arrayBuffer](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout8i15ui1ul2f2ui64/#arraybuffer) ### bytesPerElement[](#bytesperelement) bytesPerElement: number Inherited from [StructArrayLayout8i15ui1ul2f2ui64](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout8i15ui1ul2f2ui64/).[bytesPerElement](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout8i15ui1ul2f2ui64/#bytesperelement) ### capacity[](#capacity) capacity: number Inherited from [StructArrayLayout8i15ui1ul2f2ui64](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout8i15ui1ul2f2ui64/).[capacity](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout8i15ui1ul2f2ui64/#capacity) ### float32[](#float32) float32: Float32Array Inherited from [StructArrayLayout8i15ui1ul2f2ui64](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout8i15ui1ul2f2ui64/).[float32](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout8i15ui1ul2f2ui64/#float32) ### int16[](#int16) int16: Int16Array Inherited from [StructArrayLayout8i15ui1ul2f2ui64](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout8i15ui1ul2f2ui64/).[int16](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout8i15ui1ul2f2ui64/#int16) ### isTransferred[](#istransferred) isTransferred: boolean Inherited from [StructArrayLayout8i15ui1ul2f2ui64](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout8i15ui1ul2f2ui64/).[isTransferred](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout8i15ui1ul2f2ui64/#istransferred) ### length[](#length) length: number Inherited from [StructArrayLayout8i15ui1ul2f2ui64](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout8i15ui1ul2f2ui64/).[length](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout8i15ui1ul2f2ui64/#length) ### members[](#members) members: [StructArrayMember](https://docs.maptiler.com/sdk-js/api-reference/types/Externals.StructArrayMember/)\[\] Inherited from [StructArrayLayout8i15ui1ul2f2ui64](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout8i15ui1ul2f2ui64/).[members](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout8i15ui1ul2f2ui64/#members) ### uint16[](#uint16) uint16: Uint16Array Inherited from [StructArrayLayout8i15ui1ul2f2ui64](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout8i15ui1ul2f2ui64/).[uint16](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout8i15ui1ul2f2ui64/#uint16) ### uint32[](#uint32) uint32: Uint32Array Inherited from [StructArrayLayout8i15ui1ul2f2ui64](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout8i15ui1ul2f2ui64/).[uint32](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout8i15ui1ul2f2ui64/#uint32) ### uint8[](#uint8) uint8: Uint8Array Inherited from [StructArrayLayout8i15ui1ul2f2ui64](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout8i15ui1ul2f2ui64/).[uint8](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout8i15ui1ul2f2ui64/#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 [StructArrayLayout8i15ui1ul2f2ui64](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout8i15ui1ul2f2ui64/).[clear](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout8i15ui1ul2f2ui64/#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,     v12: number,     v13: number,     v14: number,     v15: number,     v16: number,     v17: number,     v18: number,     v19: number,     v20: number,     v21: number,     v22: number,     v23: number,     v24: number,     v25: number,     v26: number,     v27: 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 - v12: number - v13: number - v14: number - v15: number - v16: number - v17: number - v18: number - v19: number - v20: number - v21: number - v22: number - v23: number - v24: number - v25: number - v26: number - v27: number #### Returns number Inherited from [StructArrayLayout8i15ui1ul2f2ui64](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout8i15ui1ul2f2ui64/).[emplace](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout8i15ui1ul2f2ui64/#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,     v12: number,     v13: number,     v14: number,     v15: number,     v16: number,     v17: number,     v18: number,     v19: number,     v20: number,     v21: number,     v22: number,     v23: number,     v24: number,     v25: number,     v26: number,     v27: 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 - v12: number - v13: number - v14: number - v15: number - v16: number - v17: number - v18: number - v19: number - v20: number - v21: number - v22: number - v23: number - v24: number - v25: number - v26: number - v27: number #### Returns number Inherited from [StructArrayLayout8i15ui1ul2f2ui64](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout8i15ui1ul2f2ui64/).[emplaceBack](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout8i15ui1ul2f2ui64/#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 [StructArrayLayout8i15ui1ul2f2ui64](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout8i15ui1ul2f2ui64/).[freeBufferAfterUpload](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout8i15ui1ul2f2ui64/#freebufferafterupload) ### get[](#get) - get(index: number): [SymbolInstanceStruct](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.SymbolInstanceStruct/)[](#get-1) Return the SymbolInstanceStruct at the given location in the array. #### Parameters - index: number The index of the element. #### Returns [SymbolInstanceStruct](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.SymbolInstanceStruct/) ### 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 [StructArrayLayout8i15ui1ul2f2ui64](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout8i15ui1ul2f2ui64/).[reserve](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout8i15ui1ul2f2ui64/#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 [StructArrayLayout8i15ui1ul2f2ui64](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout8i15ui1ul2f2ui64/).[resize](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout8i15ui1ul2f2ui64/#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 [StructArrayLayout8i15ui1ul2f2ui64](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout8i15ui1ul2f2ui64/).[deserialize](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout8i15ui1ul2f2ui64/#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 [StructArrayLayout8i15ui1ul2f2ui64](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout8i15ui1ul2f2ui64/).[serialize](https://docs.maptiler.com/sdk-js/api-reference/classes/Externals.StructArrayLayout8i15ui1ul2f2ui64/#serialize)