public static JavaScriptValue CreateTypedArray(this IJSValueService valueService, JSTypedArray source, JavaScriptValue?arrayBufferSource) { IContextSwitchService switchService = valueService.CurrentNode.GetService <IRuntimeService>().InternalContextSwitchService; if (source.JSSource.IsValid) { return(source.JSSource); } switch (source.BufferSource) { case SharedBufferSourceEnum.CreateByDotnet: return(switchService.With <JavaScriptValue>( () => { if (arrayBufferSource == null) { throw new ArgumentNullException(nameof(arrayBufferSource)); } var result = JavaScriptValue.CreateTypedArray(source.ArrayType, arrayBufferSource.Value, source.Position, source.UnitCount); source.SetJSSource(result, switchService); return result; } )); case SharedBufferSourceEnum.CreateByJavascript: throw new InvalidOperationException("invalid source typed array"); //create by javascript should already have JavaScriptValue assigned case SharedBufferSourceEnum.CreateInJavascript: return(switchService.With <JavaScriptValue>( () => { var result = JavaScriptValue.CreateTypedArray(source.ArrayType, JavaScriptValue.Invalid, source.Position, source.UnitCount); source.SetJSSource(result, switchService); //hold the objec //get the internal storage JavaScriptValue.GetTypedArrayStorage(result, out IntPtr data, out uint bufferLength, out JavaScriptTypedArrayType type, out int elementSize); source.InitWindow(data, false); source.InitBeforeConvert(source.Buffer); return result; } )); case SharedBufferSourceEnum.CreateByExternal: throw new ArgumentException("TypedArray does not support create from external"); default: throw new ArgumentOutOfRangeException("Invalid BufferSource property in JSTypedArray object"); } }