> 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

## Namespace: header

## Article: Introduction

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

## Article Content:

# Introduction
The header is located at the top of the page:

 ![Wix Page Header](https://wixmp-833713b177cebf373f611808.wixmp.com/images/velo-images/media_header.png "Wix Page Header")

 The header is a container that can contain other elements.

 The contained elements are the header's [children](#children) and the
 header is the contained elements' [parent](#parent).

 The same header appears on all pages of your site. Therefore, The children
 elements of a header appear on all pages of your site.

 The `Header` is part of the [`Document`]($w.Document.html).