FrameGrid: relationship of frame property to resulting layout is not obvious

[airtonix]

Description

Trying to work this out through playing with it.

https://naver.github.io/egjs-grid/storybook/?path=/story/examples-framegrid--frame-grid-template

• default says 1,1,2,2,3,3,2,2,4,4,4,5 but when i put that in, there's a storybook form validation error (the input field is red) and nothing is rendered
• when i change it to [[1,1,2,2,3,3],[2,2,4,4,4,5]] then it renders

Looking at the resulting output

edit it just dawned on my that you're using frame to define named grid slots:

https://developer.mozilla.org/en-US/docs/Web/CSS/grid-template

Steps to check or reproduce

[malangfox]

Hello @airtonix.

In [[1,1,2,2,3,3],[2,2,4,4,4,5]] you gave as an example, it seems that the frames with index 2 are not adjacent to each other.
We recommend using it with [[1,1,2,2,3,3],[4,4,5,5,5,6]]. If you do, the items will be in the correct order.

The demo you left as a link shows 10 items.
After 6 items are displayed according to the rules, only 4 items below will be displayed according to the rules.
There seems to be no problem with this behavior. How about setting the non-adjacent frame indexes differently?