show — The Other Conditional

<if> has a sibling with a crucial difference. <show> also takes a truthy value, but its content is always rendered and stays mounted — the value only controls whether the nodes are in the document:

<show=showFilters>
  <input type="search" placeholder="Brand">
</show>

Why does that matter? Because everything inside survives the toggle: state, form values, the DOM nodes themselves. An <if> tears its content down when false and rebuilds it fresh when true — anything the user typed is gone.

Feel the difference on the right. The filter panel is wrapped in <if=open>:

1. Open the panel, type a brand name into the search box, close it, reopen. Empty — <if> rebuilt it from scratch.
2. Change the <if=open> / </if> pair to <show=open> / </show>.
3. Same dance: type, close, reopen. Your text is still there.

Choosing between them is a real design decision: <if> for content that should reset (and for skipping expensive work entirely when hidden); <show> for content whose state should survive hiding — panels, wizards, tabs. If’s teardown is a feature exactly as often as show’s persistence is.