ExperimentalFeatures.props

<?xml version="1.0" encoding="utf-8"?>
<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">

  <PropertyGroup Label="Microsoft.ReactNative Experimental Features">
    <!--
      Required for building a New Architecture project.

      Library projects can change this value to test against Old and New
      Architectures when building the library project's local sln file.
      
      Otherwise this value will be decided by the consuming RNW app.

      See https://microsoft.github.io/react-native-windows/docs/new-architecture
    -->
    <RnwNewArch>true</RnwNewArch>

    <!--
      Changes compilation to assume use of Microsoft.ReactNative NuGet packages
      instead of building the framework from source. Defaults to true.

      This is set during library project creation and is used when building
      the library project's local sln file.

      Otherwise this value will be decided by the consuming RNW app.

      See https://microsoft.github.io/react-native-windows/docs/nuget
    -->
    <UseExperimentalNuget>true</UseExperimentalNuget>

    <ReactExperimentalFeaturesSet>true</ReactExperimentalFeaturesSet>
  </PropertyGroup>

</Project>