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No.212 · Developer· New

Query Tokens

A filter bar that speaks a small syntax (status:open -label:docs updated:>2026-06 "offline sync") without giving up plain-text editing. Terms are highlighted in place, keys and values are suggested as you type, mistakes get a 'did you mean', and a row of readable chips says what the query means.

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Written for the variant you picked above: Light

Build a structured search bar for an issue list that keeps the query as editable text while showing its structure. Syntax: key:value terms, quoted values (label:"needs review"), negation with a leading minus (-label:docs), comparisons for dates and numbers (updated:>2026-08, priority:>=2) and bare words or quoted phrases for full-text search. The bar is a 44px white field with a 10px radius, a search icon and a clear button; focus adds an accent border and a soft 3px accent ring. The text is a real input in 14px JetBrains Mono with transparent text over a pixel-aligned overlay that repeats the same characters: each recognised term sits on a light blue chip with its key in blue, negated terms on a light red chip with a red key, free text on a grey chip, and an unknown key or value has no chip and a wavy red underline. Chip backgrounds use a spread shadow, never padding, so the overlay never drifts from the caret. As you type, a listbox under the bar suggests keys at the start of a term (status:, owner:, label:, with their labels muted on the right) and values after a colon (open, closed, draft); arrows move, Enter or Tab accepts, Escape closes. Under the bar, any problem reads 'No filter called “stauts”. Did you mean status:?' with the suggestion as a button (edit distance). Below that, every term becomes a readable pill: 'status is open', 'label is not docs', 'updated after 2026-08', 'contains “sync”', each with a × that removes that term from the text. Selected variant — Light (light): Palette for this theme (Light): --qtok-bad #c23a1f; --qtok-bg #ffffff; --qtok-chip rgb(11 91 211 / 0.1); --qtok-ink #1b1f24; --qtok-key #0b5bd3; --qtok-line rgb(27 31 36 / 0.14); --qtok-muted #66707c; --qtok-neg #b4261a; --qtok-neg-chip rgb(180 38 26 / 0.09); --qtok-text rgb(27 31 36 / 0.07). Treat these as the root colour tokens, one value per role, and name them to suit your code. Select it with the theme option set to "light". Keep every dimension, spacing value, state and motion from the brief unchanged, and keep text at 4.5:1 contrast or better on these surfaces. This selection takes precedence over references to other themes or options in the general brief. Implement this selected appearance; do not add a variant picker or alternative appearances unless requested. Implementation requirements: Use React and TypeScript. Keep the component self-contained, with uniquely scoped CSS and no animation libraries. Include required imports, styles and font setup in the result. Interaction: Typing edits the text directly; the overlay and suggestions follow the caret. Accepting a suggestion replaces only the term under the caret. onChange(tokens, text) fires on every edit, and the exported matchesQuery(tokens, record, keys) applies the same rules (dates compare as prefixes, so >2026-08 means after August) for client-side filtering. Motion: The suggestion list drops in 4px over 140ms; the focus ring fades over 140ms. Reduced motion removes both. Accessibility: The input is a combobox with aria-expanded, aria-controls and aria-activedescendant on a listbox of options. The overlay is aria-hidden; the readable pills are the accessible description of the query, and each remove button names its term. Problems are announced through a status region. Responsive behavior: The bar fills its container; long queries scroll horizontally with the overlay kept in step; pills wrap. Touch: Tap a suggestion to accept it; pills have their own remove buttons. Preserve keyboard access, visible focus and reduced-motion behavior. Keep fictional demo data and simulated service calls in a separate usage example; expose callbacks for real actions and recover from rejected requests. Keep usage-example links inside the demo: use local buttons or prevent navigation. Demonstration links must not navigate to Vitrine routes or open other pages; preserve real URL support in the reusable component itself. Verify the result at narrow and wide viewport sizes, with keyboard input and reduced motion enabled.

Notes

Interaction
Typing edits the text directly; the overlay and suggestions follow the caret. Accepting a suggestion replaces only the term under the caret. onChange(tokens, text) fires on every edit, and the exported matchesQuery(tokens, record, keys) applies the same rules (dates compare as prefixes, so >2026-08 means after August) for client-side filtering.
Motion
The suggestion list drops in 4px over 140ms; the focus ring fades over 140ms. Reduced motion removes both.
Accessibility
The input is a combobox with aria-expanded, aria-controls and aria-activedescendant on a listbox of options. The overlay is aria-hidden; the readable pills are the accessible description of the query, and each remove button names its term. Problems are announced through a status region.
Responsive
The bar fills its container; long queries scroll horizontally with the overlay kept in step; pills wrap.
On touch
Tap a suggestion to accept it; pills have their own remove buttons.

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