How-tos

Short, direct answers to “how do I do X” — each page is a lookup, not a tutorial. For the concept behind an answer, follow the link into Learn or API; for a full copyable app, see Examples.

Available how-tos

• Style a component — StyleSheet.create vs a Vue SFC <style> block.
• Animate a value — Animated.Value, and when the native driver can take over from the JS one.
• Handle press/change events — React callback props, Vue emits, Angular @Output().
• Two-way bind a value — Vue v-model, Angular [(value)].
• Share content across surfaces — createPortal/Teleport vs createTunnel.
• Write platform-specific code — the X.ios.ts/X.android.ts/X/shared.ts folder convention.
• Wrap a third-party native view — why the library’s React component can’t be reused, and what can.
• Wire up an Expo native module — the one-time per-app native setup every expo-modules-core wrapper package (Sensors, Haptics, Clipboard, …) needs before it resolves at runtime.
• Add a native splash screen — generate the native binary, wire it into the native project, then hide() it from JS.
• Turn on diagnostic logging — dlog/isDebug and the DEBUG env var.
• Refs and attachments in Svelte — bind:this vs {@attach} for imperative access to a host node.
• Catch render errors (Svelte) — <svelte:boundary>, a failed snippet, and reset().