> Portal Navigation:
> 
> - Append `.md` to any URL under `https://dev.wix.com/docs/` to get its markdown version.
> - Pages are either content pages (article or reference text) or menu pages (a list of links to child pages).
> - To get a menu page, truncate any URL to a parent path and append `.md` (e.g. `https://dev.wix.com/docs/sdk.md`, `https://dev.wix.com/docs/sdk/core-modules.md`).
> - Top-level index of all portals: https://dev.wix.com/docs/llms.txt
> - Full concatenated docs: https://dev.wix.com/docs/llms-full.txt

## Resource: $w



## Article: Introduction

## Article Link: https://dev.wix.com/docs/velo/velo-only-apis/$w/introduction.md

## Article Content:

# Introduction
The `$w` namespace contains all of the UI elements, nodes, and
 events that make up your site. It also includes the [`$w()`]($w/$w),
 [`onReady()`]($w.html#onReady), and [`at()`]($w.html#at) functions.

 The APIs in `$w` can only be used in front-end code.

 You do not need to import `$w`.

 > **Notes:**
 > - Most `$w` elements, nodes, and events are described here under Wix Editor Elements. Some `$w`
 elements are described in context of their functionality. For example, the [`WixForms`](https://dev.wix.com/docs/velo/velo-only-apis/$w/form/introduction.md)
 element is described under the `wix-crm-frontend` namespace because using the API for the Wix Forms app is most relevant in the
 context of site contacts and visitors.
 > - Some `$w` elements change their size dynamically, which can [affect the page layout](https://dev.wix.com/docs/develop-websites/articles/wix-editor-elements/formatting-layout/how-page-layout-is-affected-when-elements-change-size.md).

 Get hands-on experience with the `$w` API on our [Hello World](https://dev.wix.com/docs/coding-examples/getting-started/hello-world/hello-world.md) example page.