scriptable-xkcd-widget.js

const url = "https://xkcd.com/info.0.json"
const req = new Request(url)
const { img: imgUrl } = await req.loadJSON()

const imgReq = await new Request(imgUrl)
const img = await imgReq.loadImage()

// for development, displays the widget if run
const debug = false;

if (config.runsInWidget) {
  // create and show widget
  let widget = createWidget(img)
  Script.setWidget(widget)
  Script.complete()
} else if (debug) {
  let widget = createWidget(img);
  await widget.presentMedium();
} else {
  Safari.open(imgUrl)
}

function createWidget(img) {
  let widget = new ListWidget();

  widget.url = imgUrl;
  let image = widget.addImage(img);
  image.centerAlignImage();

  const [width, height] = getDimensions(config.widgetFamily);

  image.imageSize = new Size(width, height);
  return widget;
}

function getDimensions(size) {
  switch (size) {
    case "small":
      return [150, 150];
    case "medium":
      return [300, 150];
    case "large":
      return [300, 300];
    default:
      return [150, 150];
      break;
  }
}

I get an error. "widget.centerAlignContent()" is undefined/not a function

@bendiscover Honestly, I forgot I had this here, but I updated it, so now it looks like my current widget script.