[Skip to content](#main-content) [![Jx Suite](/favicon.svg) Suite](/)Search⌘KESC Jump to [Install Jx Studio](/docs/start/install)[Build your first project](/docs/start/first-project)[Document format](/docs/framework/concepts/documents)[Formula catalog](/docs/framework/reference/formulas) ↵ select↑↓ navigateesc close [Studio](/studio)[Framework](/framework)[Templates](/templates)[Compare](/compare)[Docs](/docs/start/first-project)[GitHub](https://github.com/jxsuite/jx)[Download](/download) ✕ [Studio](/studio)[Framework](/framework)[Templates](/templates)[Compare](/compare)[Docs](/docs/start/first-project)[GitHub](https://github.com/jxsuite/jx) Color scheme [Download](/download) ☰ Docs menu Start here[Overview](/docs/start/)Get started[Install Jx Studio](/docs/start/install/)[Your first project](/docs/start/first-project/)[A tour of Jx Studio](/docs/start/studio-tour/)Tutorials[Tutorial: interactive component](/docs/start/first-component/)[Tutorial: blog with 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assistant[Overview](/docs/studio/ai/)[The AI assistant](/docs/studio/ai/chat/)[Document assistant](/docs/studio/ai/document-assistant/)Publish[Overview](/docs/studio/publish/)[Source control](/docs/studio/publish/source-control/)[GitHub](/docs/studio/publish/github/)[Cloudflare Pages](/docs/studio/publish/cloudflare/)[Other hosts](/docs/studio/publish/other-hosts/)[Redirects](/docs/studio/publish/redirects/)[Real-time collaboration](/docs/studio/publish/collaboration/)Framework[Overview](/docs/framework/)Concepts[Documents](/docs/framework/concepts/documents/)[Elements](/docs/framework/concepts/elements/)[Components](/docs/framework/concepts/components/)[Props and scope](/docs/framework/concepts/props-and-scope/)[State](/docs/framework/concepts/state/)[Reactivity](/docs/framework/concepts/reactivity/)[References](/docs/framework/concepts/references/)[Expressions](/docs/framework/concepts/expressions/)[Statements](/docs/framework/concepts/statements/)[Functions and 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languages](/docs/framework/site/i18n/)[Images](/docs/framework/site/images/)[Redirects](/docs/framework/site/redirects/)[Feeds](/docs/framework/site/feeds/)[Site search](/docs/framework/site/search/)[Build output and adapters](/docs/framework/site/deployment/)How compilation works[Overview](/docs/framework/build/)[The dev server](/docs/framework/build/dev-server/)[CLI commands](/docs/framework/build/cli/)Working with agents[Overview](/docs/framework/agents/)[Authoring rules for agents](/docs/framework/agents/authoring-rules/)[Machine-readable docs](/docs/framework/agents/machine-readable/)Reference[Overview](/docs/framework/reference/)[Formula catalog](/docs/framework/reference/formulas/)[Operator reference](/docs/framework/reference/operators/)Extending[Overview](/docs/extending/)Extensions[Extension anatomy](/docs/extending/extensions/anatomy/)[Schema composition](/docs/extending/extensions/schema-composition/)[Custom classes](/docs/extending/extensions/classes/)[Custom formats](/docs/extending/extensions/formats/)[Capability methods](/docs/extending/extensions/capabilities/)[Project sections](/docs/extending/extensions/project-sections/)[Server mounts](/docs/extending/extensions/server/)[Connectors](/docs/extending/extensions/connectors/)[Search indexes](/docs/extending/extensions/search/)[Security and secrets](/docs/extending/extensions/security/)[Tutorial: a TOML format](/docs/extending/extensions/tutorial-toml-format/)[Tutorial: a guestbook](/docs/extending/extensions/tutorial-guestbook/)[First-party extensions](/docs/extending/extensions/first-party/)Embedding[Overview](/docs/extending/embedding/)[Hosting the Studio assets](/docs/extending/embedding/hosting/)[Writing a platform adapter](/docs/extending/embedding/platform-adapter/)[The backend protocol](/docs/extending/embedding/backend-protocol/)[Dev server internals](/docs/extending/embedding/dev-server/)[Embedding the runtime in your app](/docs/extending/embedding/runtime-host/)[Writing assistant tools](/docs/extending/embedding/assistant-harness/)UI kit[The Jx UI kit](/docs/extending/ui-kit/)Reference[Protocol routes](/docs/extending/reference/studio-routes/)[Implementation status](/docs/extending/reference/implementation-status/)[Spec changelog](/docs/extending/reference/spec-changelog/)[Standards alignment](/docs/extending/reference/standards/)Contributing[Working in the monorepo](/docs/extending/contributing/monorepo/)[Contributing to these docs](/docs/extending/contributing/docs/)[AI assistant evals](/docs/extending/contributing/ai-evals/) # Data sources A data source is a state entry whose value comes from somewhere rather than being typed in: a URL, the browser's storage, a form, your project's content, a database table. You add one from the **[Data panel](/docs/studio/logic/data)**'s **+ Add…** picker, and from then on it behaves like any other value: bind it, compute from it, show it. Sources are reactive, so when the underlying data changes, everything built on it updates. The model behind that is **[Reactivity](/docs/framework/concepts/reactivity)**. Each source's editor shows just the fields that source needs. ## Request: fetch from a URL **Fetch from a URL** loads data over HTTP, most typically a JSON API. ![The Data panel editing a Request source's URL, method, and timing](/content/docs/images/data-source-request.png) - **URL**: where to fetch from. - **Method**: `GET`, `POST`, `PUT`, `DELETE`, or `PATCH`. - **Timing**: `client` fetches in the visitor's browser; `server` runs the request on the server instead, which is useful when an API can't be called from a browser. While the request is in flight the entry reads as `pending` in the **[Data panel](/docs/studio/logic/data)**; the resolved response then flows wherever the entry is used. ## LocalStorage and SessionStorage: remember in the browser Both persist a value in the visitor's browser: **LocalStorage** survives closing the browser, **SessionStorage** lasts for the visit. Their editors are identical: - **Key**: the name the value is stored under. - **Default**: what the entry is worth before anything has been stored. JSON here gives you a structured default. Writing to the entry (from an event handler, say) stores it; the visitor's next visit reads it back. Think "remember my theme choice", "keep the cart". ## Cookie: a value shared with the server - **Cookie**: the cookie's name. - **Default**: the value before the cookie exists. Use a Cookie instead of LocalStorage when the server needs to see the value on each request. ## IndexedDB: a structured browser database For larger structured data the browser stores locally: - **Database**: the database name. - **Store**: the object store within it. - **Version**: the schema version number. ## FormData: the state of a form **FormData** holds a browser form-data object, the shape requests use to submit forms: - **Fields**: a JSON object naming the fields and their starting values. The entry starts out seeded with those fields, ready to fill in and send as a request body. ## Set and Map Two small structural sources round out the built-ins: **Set** (a list without duplicates) and **Map** (a keyed collection). Each has a single **Default** field, edited as JSON. ## ContentCollection: query your project's content **ContentCollection** turns your project's content (the entries behind your **[content types](/docs/studio/projects/content-types)**) into a queryable list: "the six newest posts", "properties under $500k". It's provided by the parser extension, so it appears in the **+ Add…** picker via your project's imports. Its form is generated from the source's own description: - **contentType**: which content type to query, picked from the ones your project defines. - **filter**: zero or more rules, each a **field** (picked from the content type's own fields), an **op** (`==`, `!=`, `>`, `<`, `>=`, `<=`, `contains`, `not contains`, `empty`, `not empty`), and a **value**. - **sort**: zero or more rules, each a **field** and an **order** (`asc` or `desc`). - **limit**: the maximum number of entries to return. A field that already holds a reference is edited with a binding picker instead of a plain value. The picker lists **Static value** (which clears the binding and hands the field back its ordinary editor), then one entry per URL parameter the page's address declares (`$params/slug` and friends), then **Custom…**, which reveals a free-form `#/$params/…` field for any other pointer. That is how a detail page queries "the entry this URL names". ## Database sources Everything above reads from the browser, the network, or your project's files. With the connector extension enabled, your **[data tables](/docs/studio/data)** join the picker too. They hold the data that appears and changes while the site runs. Each of these sources starts with a **table**, the name of a table your project defines: - **TableQuery**: the rows matching a query. **filter** and **sort** take the same rules as ContentCollection above, and **limit** and **offset** page through the results; **include** names reference fields to expand, so a query for posts can carry each post's author with it. - **TableEntry**: a single row, named by **id**, with the same **include**. On a page with a dynamic address the id can bind to a URL parameter, which is how a detail page shows the row its URL names. - **TableInsert**, **TableUpdate**, and **TableDelete**: writes rather than reads. Insert and update take **values**, literal columns merged over the fields of the form that submits them; update and delete take an **id**. Each resolves to a handler, so you point a form's submit event at one instead of displaying it. Once a write lands, the queries on the page refresh themselves. ## Account sources The auth extension adds two more, both about who is looking at the page: - **Session** holds the signed-in visitor: a `userId`, their `role` if your project defines roles, and the user record. The whole entry is `null` when nobody is signed in (not an empty object), so test the entry itself before reaching into it for a `userId`. It updates live when someone signs in or out, and it is also always `null` on a page as it is generated: every prerendered page ships its signed-out view and fills in once the browser has checked. The one field, **baseUrl**, defaults to your own site's `/_jx/auth`. - **AuthActions** holds the handlers behind sign-up, sign-in, social sign-in, and sign-out, wired to a form's submit event like the table actions. **redirects** sets where a visitor lands after signing in or out, **provider** names the default social provider, and **baseUrl** is the same as above. Both extensions are covered from the other side in **[Databases](/docs/studio/data)** and **[Auth and secrets](/docs/studio/data/auth-and-secrets)**: the tables, the settings, the secrets. ## External sources **From a module…** points an entry at a JavaScript module of your own (**Source** and **Kind** fields); if the module describes its options, Studio renders them as a form, the same way it does for ContentCollection. Sources added by any other installed extension list themselves in the **+ Add…** picker the same way. Note Every source is stored as a small JSON object in the file's `state` , a `$prototype` naming the kind plus the fields above. Nothing here is code; the runtime interprets these declarations, as described in **[Reactivity](/docs/framework/concepts/reactivity)** . The table sources are rewritten at build time into ordinary fetches against `/_jx/data` , so no extension code ships to the browser. ## Next - Watch a source resolve, live, in the **[Data panel](/docs/studio/logic/data)** - Compute over fetched data with **[Formulas and expressions](/docs/studio/logic/formulas)** - Content types themselves are managed in **[Content types](/docs/studio/projects/content-types)** ✕ Start here[Overview](/docs/start/)Get started[Install Jx Studio](/docs/start/install/)[Your first project](/docs/start/first-project/)[A tour of Jx Studio](/docs/start/studio-tour/)Tutorials[Tutorial: interactive component](/docs/start/first-component/)[Tutorial: blog with collections](/docs/start/first-collection/)[Video tutorials](/docs/start/videos/)Coming from another tool[Coming from WordPress](/docs/start/coming-from-wordpress/)[Coming from Webflow or Framer](/docs/start/coming-from-webflow/)[Coming from Wix or Squarespace](/docs/start/coming-from-wix/)[Coming from Lovable or Builder.io](/docs/start/coming-from-ai-builders/)Studio[Overview](/docs/studio/)[The desktop app](/docs/studio/desktop/)The workspace[Overview](/docs/studio/interface/)[Welcome screen](/docs/studio/interface/welcome-screen/)[Editors and views](/docs/studio/interface/modes/)[The canvas](/docs/studio/interface/canvas/)[Documents and panes](/docs/studio/interface/tabs/)[Quick Access](/docs/studio/interface/quick-access/)[Keyboard shortcuts](/docs/studio/interface/shortcuts/)[Preferences](/docs/studio/interface/preferences/)[Languages](/docs/studio/interface/languages/)[Problems and progress](/docs/studio/interface/problems-and-progress/)[Commands](/docs/studio/interface/commands/)Projects[Overview](/docs/studio/projects/)[Create a project](/docs/studio/projects/create/)[Pages, layouts, components](/docs/studio/projects/pages-layouts-components/)[The Content workspace](/docs/studio/projects/browse/)[Starter templates](/docs/studio/projects/starters/)[Media](/docs/studio/projects/media/)[Content types](/docs/studio/projects/content-types/)[Project settings](/docs/studio/projects/settings/)[Dependencies and imports](/docs/studio/projects/dependencies/)Edit mode[Overview](/docs/studio/editing/)[Writing and formatting](/docs/studio/editing/writing/)[Slash commands](/docs/studio/editing/slash-commands/)[Frontmatter and metadata](/docs/studio/editing/frontmatter/)[Grid mode](/docs/studio/editing/grid/)Design mode[Overview](/docs/studio/design/)[Outline](/docs/studio/design/layers/)[Insert](/docs/studio/design/elements/)[Content tab](/docs/studio/design/properties/)[Style inspector](/docs/studio/design/style-inspector/)[Breakpoints](/docs/studio/design/breakpoints/)[States and selectors](/docs/studio/design/states-and-selectors/)[Design tokens](/docs/studio/design/tokens/)[Project Styles](/docs/studio/design/stylebook/)[Working with components](/docs/studio/design/components/)[Repeaters](/docs/studio/design/repeaters/)Logic[Overview](/docs/studio/logic/)[Formulas and expressions](/docs/studio/logic/formulas/)[Formula workspace](/docs/studio/logic/formula-workspace/)[Statements](/docs/studio/logic/statements/)[Logic tab](/docs/studio/logic/events/)[Data](/docs/studio/logic/data/)[Data sources](/docs/studio/logic/data-sources/)[Code editing](/docs/studio/logic/code/)Databases[Overview](/docs/studio/data/)[Connections](/docs/studio/data/connections/)[Data tables](/docs/studio/data/tables/)[Data grid](/docs/studio/data/grid/)[Auth and secrets](/docs/studio/data/auth-and-secrets/)AI assistant[Overview](/docs/studio/ai/)[The AI assistant](/docs/studio/ai/chat/)[Document assistant](/docs/studio/ai/document-assistant/)Publish[Overview](/docs/studio/publish/)[Source control](/docs/studio/publish/source-control/)[GitHub](/docs/studio/publish/github/)[Cloudflare Pages](/docs/studio/publish/cloudflare/)[Other hosts](/docs/studio/publish/other-hosts/)[Redirects](/docs/studio/publish/redirects/)[Real-time collaboration](/docs/studio/publish/collaboration/)Framework[Overview](/docs/framework/)Concepts[Documents](/docs/framework/concepts/documents/)[Elements](/docs/framework/concepts/elements/)[Components](/docs/framework/concepts/components/)[Props and scope](/docs/framework/concepts/props-and-scope/)[State](/docs/framework/concepts/state/)[Reactivity](/docs/framework/concepts/reactivity/)[References](/docs/framework/concepts/references/)[Expressions](/docs/framework/concepts/expressions/)[Statements](/docs/framework/concepts/statements/)[Functions and sidecars](/docs/framework/concepts/functions/)[Styling](/docs/framework/concepts/styling/)[Color schemes](/docs/framework/concepts/color-schemes/)[Popovers and overlays](/docs/framework/concepts/overlays/)[Accessibility](/docs/framework/concepts/accessibility/)[Lists and iteration](/docs/framework/concepts/lists/)[Data prototypes](/docs/framework/concepts/data-prototypes/)[Timing](/docs/framework/concepts/timing/)[Dynamic switching](/docs/framework/concepts/switching/)[Security](/docs/framework/concepts/security/)Site architecture[Overview](/docs/framework/site/)[project.json](/docs/framework/site/project-json/)[Routing](/docs/framework/site/routing/)[Layouts](/docs/framework/site/layouts/)[Content collections](/docs/framework/site/content-collections/)[Jx Markdown](/docs/framework/site/jx-markdown/)[Obsidian vault as content](/docs/framework/site/obsidian-vault/)[Relationships](/docs/framework/site/relationships/)[SEO and metadata](/docs/framework/site/seo/)[Locales and languages](/docs/framework/site/i18n/)[Images](/docs/framework/site/images/)[Redirects](/docs/framework/site/redirects/)[Feeds](/docs/framework/site/feeds/)[Site search](/docs/framework/site/search/)[Build output and adapters](/docs/framework/site/deployment/)How compilation works[Overview](/docs/framework/build/)[The dev server](/docs/framework/build/dev-server/)[CLI commands](/docs/framework/build/cli/)Working with agents[Overview](/docs/framework/agents/)[Authoring rules for agents](/docs/framework/agents/authoring-rules/)[Machine-readable docs](/docs/framework/agents/machine-readable/)Reference[Overview](/docs/framework/reference/)[Formula catalog](/docs/framework/reference/formulas/)[Operator reference](/docs/framework/reference/operators/)Extending[Overview](/docs/extending/)Extensions[Extension anatomy](/docs/extending/extensions/anatomy/)[Schema composition](/docs/extending/extensions/schema-composition/)[Custom classes](/docs/extending/extensions/classes/)[Custom formats](/docs/extending/extensions/formats/)[Capability methods](/docs/extending/extensions/capabilities/)[Project sections](/docs/extending/extensions/project-sections/)[Server mounts](/docs/extending/extensions/server/)[Connectors](/docs/extending/extensions/connectors/)[Search indexes](/docs/extending/extensions/search/)[Security and secrets](/docs/extending/extensions/security/)[Tutorial: a TOML format](/docs/extending/extensions/tutorial-toml-format/)[Tutorial: a guestbook](/docs/extending/extensions/tutorial-guestbook/)[First-party extensions](/docs/extending/extensions/first-party/)Embedding[Overview](/docs/extending/embedding/)[Hosting the Studio assets](/docs/extending/embedding/hosting/)[Writing a platform adapter](/docs/extending/embedding/platform-adapter/)[The backend protocol](/docs/extending/embedding/backend-protocol/)[Dev server internals](/docs/extending/embedding/dev-server/)[Embedding the runtime in your app](/docs/extending/embedding/runtime-host/)[Writing assistant tools](/docs/extending/embedding/assistant-harness/)UI kit[The Jx UI kit](/docs/extending/ui-kit/)Reference[Protocol routes](/docs/extending/reference/studio-routes/)[Implementation status](/docs/extending/reference/implementation-status/)[Spec changelog](/docs/extending/reference/spec-changelog/)[Standards alignment](/docs/extending/reference/standards/)Contributing[Working in the monorepo](/docs/extending/contributing/monorepo/)[Contributing to these docs](/docs/extending/contributing/docs/)[AI assistant evals](/docs/extending/contributing/ai-evals/) [![Jx Suite](/favicon.svg) Suite](/)The visual IDE for the web. 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