How to honor user resized textarea in phx-change?

I have a textarea in a liveview form, with a rows=XX attribute. The textarea is user resizable by a mouse drag. However, it looks like every time phx-change fired, the textarea will snap back to the original size. How do I prevent that? I want to keep the user dragged size.

I haven’t tried it yet, but do you assign the rows=XX attribute from your socket.assigns?

For example:

rows=<%= @textarea_rows %>

No. It was hard coded. Also the same thing will happen without a row=XX for the textarea; it will just snap back to the default.

I figured it out: Adding phx-update="ignore" to the textarea fixed it.

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Yes, but if you refresh the page, it won’t retain that value unless you render it from your state, e.g. socket.assigns

You can create an HTML element resize listener, applied in a javascript Hooks and either store the value in browser storage or push an event to a handler in your module, to store it in socket.assigns, then render the height and width of the element, e.g. height=<%= @textarea_height %>

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Here is a potential HTML element resize listener method

Thanks. I don’t have a need to persist user dragged size as a preference value; but I will keep that in mind.