/inertia

Inertia.js for The Boring JavaScript Stack

Inertia.js is the bridge between Sails.js and your frontend framework (React, Vue, or Svelte) in The Boring JavaScript Stack. It lets you build modern single-page apps using classic server-side routing and controllers -- no API required. The inertia-sails package implements the full Inertia.js v2 protocol as a Sails hook.

When to Use

Use this skill when:

• Rendering pages with Inertia (responseType: 'inertia')
• Setting page-specific meta tags, titles, and OG images with locals (sails.inertia.local(), return { locals })
• Handling form submissions and redirects (responseType: 'redirect' vs 'inertiaRedirect')
• Sharing data globally across all pages (sails.inertia.share(), once(), refreshOnce())
• Working with flash messages (sails.inertia.flash())
• Handling validation errors (responseType: 'badRequest', form.errors)
• Using advanced props: deferred, optional, always, merge, scroll
• Building frontend components with useForm, usePage, Link, Head, router
• Setting up createInertiaApp and persistent layouts
• Handling server errors with the Inertia error modal
• Working with partial reloads, history encryption, or asset versioning

Rules

Read individual rule files for detailed explanations and code examples:

• rules/getting-started.md - How Inertia works, the protocol, client and server setup
• rules/rendering-pages.md - Server-side rendering, page objects, the inertia response type
• rules/locals.md - Locals for the root EJS template -- SEO meta tags, Open Graph, page titles, structured data
• rules/actions-and-exits.md - Action2 patterns, exit response types, the four action patterns
• rules/redirects-and-responses.md - redirect vs inertiaRedirect, when to use each, location visits
• rules/shared-data-and-flash.md - share(), once(), refreshOnce(), flushShared(), flash()
• rules/forms-and-validation.md - useForm, form submission, validation errors, badRequest flow
• rules/props-system.md - AlwaysProp, DeferProp, MergeProp, OnceProp, OptionalProp, ScrollProp
• rules/client-side-components.md - Link, router, usePage, Head, layouts, createInertiaApp
• rules/error-handling.md - Server errors, the dev error modal, production error handling
• rules/advanced-features.md - History encryption, partial reloads, asset versioning, CSRF, SSR

Framework-Specific APIs

• rules/react.md - React: useForm, usePage, Link, Head, Deferred, WhenVisible, usePoll, layouts
• rules/vue.md - Vue: useForm, usePage, Link, Head, Deferred, WhenVisible, usePoll, defineOptions layouts
• rules/svelte.md - Svelte: useForm (stores), page store, Link, inertia action, svelte:head, layouts