code: function showGlInfo(gl) {
    const vertexUnits = gl.getParameter(gl.MAX_VERTEX_TEXTURE_IMAGE_UNITS);
    const fragmentUnits = gl.getParameter(gl.MAX_TEXTURE_IMAGE_UNITS);
    const combinedUnits = gl.getParameter(gl.MAX_COMBINED_TEXTURE_IMAGE_UNITS);
    console.log('vertex texture image units:', vertexUnits);
    console.log('fragment texture image units:', fragmentUnits);
    console.log('combined texture image units:', combinedUnits);
  }
docs: Show GL informations