excalidraw/dev-docs/docs/codebase/frames.mdx

# Frames

## Ordering

Frames should be ordered where frame children come first, followed by the frame element itself:

```
[
  other_element,
  frame1_child1,
  frame1_child2,
  frame1,
  other_element,
  frame2_child1,
  frame2_child2,
  frame2,
  other_element,
  ...
]
```

If not oredered correctly, the editor will still function, but the elements may not be rendered and clipped correctly. Further, the renderer relies on this ordering for performance optimizations.

# Arrows

An arrow can be a child of a frame only if it has no binding (either start or end) to any other element, regardless of whether the bound element is inside the frame or not.

This ensures that when an arrow is bound to an element outside the frame, it's rendered and behaves correctly.

Therefore, when an arrow (that's a child of a frame) gets bound to an element, it's automatically removed from the frame.

Bound-arrow is duplicated alongside a frame only if the arrow start is bound to an element within that frame.