---
sourceDocument: Brazil Build or modify applications
sourceDocumentLink: https://www.servicenow.com/docs/r/application-development

 Release :

    - brazil

ft:locale :

    - en-US

ft:publication_title :

    - Brazil Build or modify applications

ft:clusterId :

    - cadev

bundleId :

    - cadev

workflow :

    - Development, Data, and Analytics


---

# Build with Lux

# Build with Lux {#ariaid-title1}

Release version: Brazil  
Updated September 30, 2026  
![](https://www.servicenow.com/docs/portal-asset/ico-clock) 1 minute to read  
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 variants 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.