Block catalog - every block, its properties and events

What it is for

A block is the building unit of a screen. This catalog lists all 283 blocks in the platform with every property each accepts, where the value may come from (static, expression or binding), the events it fires, and the values it outputs. For blocks that have fuller documentation it adds what the block is for, an example, and tips.

New to blocks? Read How a screen is built first.

Pick a category

Category	Count	Use it to
Display	80	Show information: text, images, charts, cards, progress and status
Input	53	Take a value: text, numbers, dates, choices, files, signatures, lookups
Data	82	Work with records: grids, lists, trees, boards, calendars, timelines, search, and business widgets
Layout and navigation	41	Arrange and move: containers, tabs, dialogs, menus, breadcrumbs, sign-in building blocks
Action	27	Let a person act: buttons, toolbars, toggles, approval and workflow controls

Common choices

You need	Use
A table of records with paging, filters, grouping, bulk actions	core.grid
A pick-from-related-records field	core.lookup (and its presets such as core.country-select)
A fixed dropdown	core.select, or core.radio-group for a few visible choices
A card with one big number	core.kpi-card
A board you drag cards across	core.kanban
Charts	core.chart, core.pie-chart, core.donut-chart, core.gauge and others in Display
Approve or reject a workflow task	core.approval-panel, core.workflow-status
Attach files	core.file-upload
Tabs, accordions, split panes	core.tabs, core.accordion, core.split-pane

Reading an entry

• Property: the name you set in properties.
• Type: string, number, boolean, date, or json (a list or object).
• Set from: static (a fixed value), expression (computed) and binding (live from state). A property that lists only static cannot be bound.
• Events: what the block can tell the page. Attach an action chain to any of them.
• Outputs: the value an input block holds. Write it to a scope and key to share it.

Finding a block from the command line

erp blocks list                       # all blocks, one summary each
erp blocks list --category input
erp blocks list --type core.lookup    # the full definition of one block

An AI coding agent gets the same data from the erp_list_blocks tool.

Where next

• How a screen is built
• Add a custom block
• Blocks designer