Skip to contents

Changelog

Source: NEWS.md

irid (development version)

Breaking changes

  • Event and binding dispatch config now rides the slot it configures via a single carrier, wire(subject, timing, coalesce, dom_opts). The element-level .event and .prevent_default props are removed, along with event_immediate() / event_throttle() / event_debounce() — replaced by the pure timing shapes wire_immediate() / wire_throttle(ms, leading) / wire_debounce(ms) (with coalesce hoisted onto wire) and wire_dom_opts(prevent_default, stop_propagation, capture, passive). A bare handler/reactive in a slot still works as sugar for wire(callable).
  • A DOM event is now bound or handled, never both. Combining a value/checked binding with an explicit on* handler for the same event (e.g. value = rv, onInput = ...) is an error; use value = reactiveProxy(get, set) for a synchronous write side-effect, or observe the bound reactive for an async reaction. Two explicit handlers on the same event also error (no composition).

New features

  • IridWidget() — wrap arbitrary JavaScript libraries (CodeMirror, Plotly, Leaflet, …) as reactive irid components. Props are two-way-capable by default (symmetric with DOM value/checked): a callable prop reads inbound and accepts write-back when the widget JS calls setProp(key, value). Genuine notifications flow back via events (sendEvent). Composes inside When, Each, and Match like any other irid construct. See examples/codemirror.R.

  • Per-item (Each) and per-case (Match) reactiveVals are now reclaimed on unmount, rather than leaking until session end. make_scope feature-detects shiny#4372’s scoped-teardown API at runtime: on a Shiny that carries it, scope$destroy() reclaims the per-item / per-case observers and reactiveVals — plus any user observe() in a component body. Pre-#4372 Shiny (including current CRAN) is unchanged; no irid change is required at upgrade time.

Bug fixes

  • Reactive bindings no longer flicker when user activity outpaces the server’s echo. The optimistic-update protocol’s stale-echo skip used to apply only to focused text inputs; it now covers all reactive bindings.

irid 0.2.0

Breaking changes

  • Auto-bind: value and checked accept any callable (reactiveVal, store leaf, reactiveProxy, plain function) and two-way bind automatically. Reads populate the IDL property; DOM events write back through the same callable. When auto-bind coexists with an explicit on* handler on the same event, the auto-bind write always lands first regardless of attribute order. Works on <input>, <textarea>, <select> for value; checkboxes and radios for checked.

  • event_immediate() / event_throttle() / event_debounce() no longer wrap a handler. They return a config used with the element-level .event prop. Per-handler timing is gone:

    # OLD
tags$input(value = field, onInput = event_debounce(\(e) field(e$value), ms = 500))

# NEW
tags$input(value = field, .event = event_debounce(500))

    .event takes a single config or a named list keyed by lowercase DOM event for per-event overrides.

  • prevent_default moved off the event constructors onto the element as .prevent_default. Logical scalar broadcasts; named list overrides per event; unmapped events default to FALSE.

  • Each() redesigned. The callback receives a per-item callable (mini- store for records, scalar accessor for atomics) and an optional pos. Reconciliation moves to by: NULL (default) for positional, \(x) x$id for keyed. In-place value changes update accessors without DOM recreation; keyed reorders move DOM nodes.

  • Match() projects the bound value as a mini-store for the active case’s body (records) or the bare callable (scalars). Active-case change fully tears down the previous case and mounts the new one fresh.

  • When() is a fixed-shape binary specialization of Match(). yes / otherwise must be 0-arg functions returning tag trees; each activation builds a fresh tree.

  • Index() removed. Covered by Each(items, fn) with default by = NULL.

New features

  • reactiveProxy() — callable built from a get reader and optional set writer for validation, transforms, and read-only views at component boundaries.
  • reactiveStore() — hierarchical reactive state container. Bare named lists become navigable sub-nodes; everything else (including I()-wrapped lists) is a reactiveVal leaf. Branch writes replace and must list every locked key; node$key(value) is the single-slot path.
  • innerHTML is now a DOM property, so reactive writes hit the IDL property directly.

Bug fixes

  • Reactive text children use a comment-anchor pair instead of a <span> wrapper, so reactive text no longer adds spurious wrappers to the DOM.

irid 0.1.0

Initial release.

Features

  • Reactive attributes and children — pass functions to any tag attribute or text child for fine-grained DOM updates without re-rendering
  • Controlled inputs — bind value directly to a reactiveVal for two-way binding without update*Input() callbacks
  • Composable components — plain functions that accept reactiveVals for natural state sharing
  • Control flow primitives: When(), Each(), Index(), Match()
  • Output bindings: Output(), PlotOutput(), TableOutput(), DTOutput()
  • Event handling with event_immediate(), event_throttle(), event_debounce()
  • Embed in existing Shiny apps via iridOutput() / renderIrid(), or build standalone apps with iridApp()
  • Optimistic updates with sequence-number tracking