let slide = pptx.addSlide();
let slide = pptx.addSlide("MASTER_NAME");
(See Master Slides for more about creating masters/templates)
// Create a new Slide that will inherit properties from a pre-defined master page (margins, logos, text, background, etc.)
let slide = pptx.addSlide("TITLE_SLIDE");
The Slide object returns a reference to itself, so calls can be chained.
Example:
slide.addImage({ path: "img1.png", x: 1, y: 2 }).addImage({ path: "img2.jpg", x: 5, y: 3 });
See Slide Methods for features such as Background and Slide Numbers.