Preview

counter.js

+3 −2

1 − export function counter(start) {

1 + export function counter(start = 0) {

2 2 let count = start;

3 − return () => count++;

3 + const next = () => ++count;

4 + return next;

4 5 }

Controls

Theme

Surface

Direction

Viewport

Device view renders in an isolated frame so real responsive breakpoints apply. Switch to Full for overflowing popovers.

Installation

terminal

php artisan ui:add diff-viewer

Registry contract

Install confidence

php artisan ui:add diff-viewer writes only the generated targets below. The CLI validates each file hash before writing and prompts before replacing local changes unless --force is used.

Version: 1.0.0
License: open
Stability: stable
Contract: v2
Foundation: ≥ 1.0.0

Type	Generated target
blade	resources/views/components/ui/diff-viewer.blade.php

Registry dependencies

copy-button

Package dependencies

composer: jml/brok:^1.0

Guidance

Developer and documentation tool

Expose exact technical or diagnostic information.

Use when

Use for exact technical detail, code readability, diagnostics, and copyable reference material. Do not surface developer-specific patterns in end-user flows unless the task genuinely requires them.

Avoid when

Avoid using diff-viewer as a default simply because it is available in the library. Choose it only when its interaction cost, visibility, and behavior match the job to be done.

Task length: medium
Interaction cost: medium
Interruptiveness: none
Input precision: precise
Mobile / touch risk: low
Accessibility risk: medium
Needs background context: No
Comparison needed: No

Preferred alternatives

Plain-language product UI for nontechnical users

Anti-patterns

Exposing developer tooling in end-user flows without a task need

Related: copy-button

API

manifest knowledge + registry-derived coverage

Props

Prop	Type / values	Default	Description
oldCode	mixed\|null	null	Declared by @props in the registry Blade source.
newCode	mixed\|null	null	Declared by @props in the registry Blade source.
lines	mixed\|null	null	Declared by @props in the registry Blade source.
layout	string	unified	Declared by @props in the registry Blade source.
language	mixed\|null	null	Declared by @props in the registry Blade source.
oldTitle	mixed\|null	null	Declared by @props in the registry Blade source.
newTitle	mixed\|null	null	Declared by @props in the registry Blade source.

Slots

Components use the default Blade slot unless a documented subcomponent is installed by the registry item.

Data slots

diff-viewer

Capabilities

wcag-2.2-aa-target responsive rtl darkMode localized

Behavior

Uses server-rendered Blade and semantic HTML.
Declares registry capability flags: a11y, responsive, rtl, darkMode, localized.

Usage

previews.components.diff-viewer.default.blade.php Blade

@php
    $old = "export function counter(start) {\n  let count = start;\n  return () => count++;\n}";
    $new = "export function counter(start = 0) {\n  let count = start;\n  const next = () => ++count;\n  return next;\n}";
@endphp

<x-ui.diff-viewer
    :old-code="$old"
    :new-code="$new"
    old-title="counter.js"
    new-title="counter.js"
    layout="unified"
    class="w-full"
/>

Accessibility & localization

WCAG 2.2 AA RTL-ready data-slot Keyboard focus-visible Localized labels

Accessibility target: wcag-2.2-aa-target.
Uses semantic HTML and a stable data-slot attribute for styling/scripting hooks.
Focus-visible rings use the ring token so keyboard focus is always visible.
Disabled and invalid states are conveyed to assistive tech, not by color alone.
Targets WCAG 2.2 AA; verify contrast in light, dark, admin and customer surfaces above.
Labels go through __() and the component uses logical properties (ms-*, text-start, start-*) so it mirrors correctly — flip the preview to RTL to confirm.

Source

The exact, editable file ui:add writes into your app — copy it or own the whole thing. Previews render this same code; there are no preview-only components.

Changelog

Current version: v1.0.0. See the site changelog for the full release history.

Diff Viewer