create-page

CREATE PAGE - MDL Syntax Guide

Reference files

SKILL.md covers page structure, the syntax, and what does not work. The bulk is next door:

• reference/widgets.md — the widget catalogue: every supported widget with its properties and the exact MDL spelling. Look a widget up here before writing it; guessing a property name is the most common way a page fails to build.
• reference/examples.md — complete pages, end to end, to copy and adapt rather than assemble from parts.

For the widgets this project actually has — including any marketplace or custom ones — read the generated widgets skill instead (.ai-context/skills/widgets/SKILL.md).

Overview

Guide for writing CREATE PAGE statements in Mendix Definition Language (MDL).

Syntax

create [or replace] page Module.PageName
(
  [params: { $ParamName: Module.EntityType | PrimitiveType, ... },]
  [variables: { $varName: DataType = 'defaultExpression', ... },]
  title: 'Page Title',
  layout: Module.LayoutName,
  [url: 'page-url',]
  [folder: 'FolderPath',]
  [PopupWidth: 800, PopupHeight: 480, PopupResizable: true,]
  [Class: 'css-class', Style: 'css: rule']
)
{
  -- Widget definitions using explicit properties
}

Pop-up dimensions (PopupWidth / PopupHeight / PopupResizable) apply when the page is opened in a pop-up. They are optional — omitting them uses the Mendix defaults (600 × 600, not resizable). Unlike the other header keywords, these property names are case-sensitive and must be written exactly as shown. They can also be changed later with alter page … { set PopupWidth = …; } (see the alter-page skill).

Page CSS class / style (Class / Style) set the page's Appearance — a CSS class and inline style applied to the whole page (e.g. Class: 'container-fluid bg-light'). Both are optional and can be changed later with alter page … { set Class = '…'; }.

Page Variables: Local variables at the page level for use in expressions (e.g., column visibility).

• DataType: boolean, string, integer, decimal, datetime
• Default value: Mendix expression in single quotes
• Referenced in expressions as $varName
• Use for DataGrid2 column visible: (which hides/shows entire column, NOT per-row)