function isWebGLSupported()
{
  const contextOptions = { stencil: true, failIfMajorPerformanceCaveat: true };

  try
  {
    if (!window.WebGLRenderingContext)
    {
      console.log('No window.WebGLRenderingContext');
      return false;
    }

    const canvas = document.createElement('canvas');
    let gl = canvas.getContext('webgl', contextOptions) || canvas.getContext('experimental-webgl', contextOptions);

    if (!gl) {
      console.log('no webgl context');
    }

    if (!gl.getContextAttributes().stencil) {
      console.log('no stencil');
    }

    const success = !!(gl && gl.getContextAttributes().stencil);

    if (gl)
    {
      const loseContext = gl.getExtension('WEBGL_lose_context');
      if (loseContext)
      {
        loseContext.loseContext();
      }
    }

    gl = null;

    return success;
  }
  catch (e)
  {
    console.log('catched error', e);
    return false;
  }
}

isWebGLSupported();