To understand how these properties work, I suggest you to show a practical example.

For example, only writing this:

<

div style=”width:200px; display: flex; flex-wrap: wrap;”>,

doesn’t help me to understand the “flex-wrap: wrap” mechanism because I wrote this but I don’t see the effect after setting this property.

It’s good to show these properties but it would be better if you add practical examples.

Best regards.

Trying to get to the bottom of this. This part you wrote seems true: “flex-start also respects writing-mode direction.”

What is says right now:
– flex-start: items are packed toward the start of the flex-direction.
– start: items are packed toward the start of the writing-mode direction.

What MDN says:
– flex-start: The cross-start margin edges of the flex items are flushed with the cross-start edge of the line.
– start: The items are packed flush to each other toward the start edge of the alignment container in the appropriate axis.

It seems like there is some kind of difference, but I don’t understand what it is.

Little playground to test https://codepen.io/chriscoyier/pen/OJgVRPL

flex-start (default): items are packed toward the start of the flex-direction.

start: items are packed toward the start of the writing-mode direction.

This is technically incorrect. Flex-start also respects writing-mode direction.