Let me take a screenshot inside an iframe

[EllaCloudCannon]

I use this macro to take screenshots of elements in the browser; however, I can't select elements that are inside of iframes.

macro: I screenshot the element {selector} as {name}
steps:
  - step: In my browser, I evaluate {js}
    js: |-
      await toolproof.waitFor(() => document.readyState == 'complete');
      await document.fonts.ready;
      let status = "Name is OK.";
      if ("%name%".indexOf("/") >= 0) {
        status = "Name contains a slash but should not."
      }
      if ("%name%".indexOf("_") >= 0) {
        status = "Name contains an underscore but should not."
      }
      if ("%name%".indexOf(" ") >= 0) {
        status = "Name contains a space but should not."
      }
      toolproof.assert_eq(status, "Name is OK.");
  - In my browser, I screenshot the element "%selector%" to "%toolproof_process_directory%/assets%name%.webp"
  - macro: Store metadata for "%name%" from "%selector%"