TesseraUI v1.0.0 — Initial Release (Alpha)

Requires: Minecraft 1.21.1 · NeoForge 21.1.x · Java 21 Note: Alpha — public API may change before stable release.

Core

• HTML + CSS template renderer — write UI in plain HTML/CSS, rendered as native Minecraft widgets
• TesseraTemplateRenderer — full HTML-to-widget pipeline
• TesseraModel — flat key-value data binding with {{ expr }} expressions
• TesseraScreen — base screen class with automatic event wiring
• TesseraHotReload — live reload from disk without restarting Minecraft
• TesseraPalette — copper-patina design system

Layout

• Flexbox engine — flex-grow, flex-shrink, flex-wrap, gap, align-items, justify-content
• Grid layout — <grid cols="N"> and grid-template-columns
• position: absolute, z-index, order, overflow: hidden, box-sizing
• calc() expressions for width and height
• margin-top: auto

Visual

• background, border, border-radius, opacity, corner-dot
• color, font-size, font-weight, text-align, text-decoration, white-space
• Pseudo-states: :hover, :active, :focus, :disabled, :nth-child
• CSS variables — :root { --var: value } and var(--name)
• Media queries — @media (min-width / max-width)

Animations

• transition — smooth hover interpolation for background, border-color, color
• @keyframes — named animations with from, %, to stops
• animation — duration, easing, delay, iterations, alternate
• Cubic-Bézier easing (Newton-Raphson solver)

Widgets

• TesseraPanel (col, row, grid), TesseraLabel, TesseraButton
• TesseraInput, TesseraTextArea
• TesseraCheckbox, TesseraSlider, TesseraDropdown
• TesseraBadge, TesseraIcon
• TesseraTabPanel — tabbed container
• TesseraVirtualList — efficient scrolling list (visible rows only)
• TesseraItemSlot, TesseraItemGrid, TesseraInventoryPicker

Data Binding & Directives

• {{ expr }} — inline expressions, ternary, string concat, t:key translations
• v-for, v-if, v-show
• data-i18n — Minecraft i18n binding

Component System

• <template name="..."> — reusable components
• <slot> / <slot name="..."> — named and default slot injection

Drag & Drop

• draggable="true" and drag-payload attributes
• TesseraDropZone — accepts(), onDrop(), dropBounds()

License: LGPL-3.0