---
title: Build with Lux
description: You build a Lux app in code, starting from its pages. A page is a Lit web component that Lux registers as a route based on where you put its file.
locale: en-US
canonical_url: https://www.servicenow.com/docs/r/australia/application-development/build-with-lux.html
release: australia
topic_type: concept
last_updated: "2026-09-30"
reading_time_minutes: 1
keywords: [Build with Lux]
breadcrumb: [Lux Development, Building pro-code applications, Developing your application, Building applications]
---

# Build with Lux

You build a Lux app in code, starting from its pages. A page is a Lit web component that Lux registers as a route based on where you put its file.

Use page collections to let more than one page module claim the same route. Topics in this chapter also cover layouts and editable regions, making a component property configurable inline, and authoring widgets. They close with components: their fundamentals, their lifecycle, and how to make one reusable across pages and apps.