Inline Editing
Let people change a single value in place instead of opening a whole edit screen.
What it adds
Click-to-edit fields in lists, tables, and detail views, with keyboard commit, validation, and rollback.
What your agent is told to do
5
What your agent is told to do
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Pick the fields worth editing inline: short, single-value, low-risk. Long text, relationships, and anything with side effects belong in a real form.
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Make the editable region obviously interactive before it is clicked, and require a deliberate gesture to enter edit mode.
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Support Enter to commit, Escape to cancel, and Tab to commit and move to the next field. Keyboard-only editing must be complete.
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Keep the original value until the save succeeds, and restore it visibly with an explanation if it fails.
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Do NOT enter edit mode on a stray click during text selection or row navigation. An accidental edit mode that eats a keystroke is worse than a slower flow.
Edge cases it handles
7
Edge cases it handles
7- A failed save must restore the previous value and say why, not leave the invalid input sitting there looking saved.
- If another user changed the value while this one was editing, say so and let them choose. Do not silently overwrite.
- Losing permission mid-edit must exit edit mode with an explanation, not fail confusingly on submit.
- Screen readers need the mode change announced and the field labelled — an unlabelled input appearing in a table cell is invisible.
- The editor must not resize the row or shift the table layout when it opens.
- Clicking outside should commit or cancel, but pick one and be consistent across the app.
- Rapid edits to several fields must not race each other into an inconsistent record.
Definition of done
9
Definition of done
9- Editable fields are visually identifiable before interaction.
- Enter commits, Escape cancels, and Tab commits and advances.
- A failed save restores the original value and explains the failure.
- Concurrent edits by another user are detected and surfaced rather than overwritten.
- Entering and leaving edit mode is announced to assistive technology.
- Edit mode is never triggered by text selection or row navigation.
- Row height and column widths do not shift when an editor opens.
- The feature matches the existing design system.
- No existing functionality is broken.
Related features
Unit Converter
Unit Converter
Let people convert a value between units without leaving the page they are on.
What it does
An inline converter that takes a typed value in one unit and shows the equivalent in another, in place.
How it works
- 1 Start from the units the app actually deals in. A shipping tool needs weight and length; a recipe tool needs volume and temperature. Ship those and leave the rest out.
- 2 Convert as the user types, with the result visible beside the input rather than behind a submit button. Let either side be edited so the conversion runs in both directions.
- 3 Reuse the app's existing number parsing and display formatting rather than writing new ones. If Locale-Aware Numbers and Dates or Number Formatting Component is already present, the converter must render through it so grouping and decimal marks match the rest of the app.
Copy the prompt
No account needed
Add this feature to my app:
https://addthisfeature.com/x/unit-converter
Voice Dictation
Voice Dictation
Put a microphone in text fields so people can speak their input instead of typing it.
What it does
A dictation control on the app's longer text inputs that transcribes speech into the field as the user talks.
How it works
- 1 Add the control to the fields where typing is genuinely tedious: long descriptions, notes, comments, and message bodies. A microphone on a postcode field is clutter.
- 2 Show interim results in the field as they arrive, visually distinct from committed text, so the speaker can see it is working and correct course before they finish.
- 3 Reuse the app's existing Voice Transcription for the server-side path so one recognition configuration and one set of language settings serve both dictation and recorded audio.
Copy the prompt
No account needed
Add this feature to my app:
https://addthisfeature.com/x/voice-dictation
Code Editor Field
Code Editor Field
Edit code, JSON, and config with syntax highlighting instead of a bare textarea.
What it does
A form field backed by a real code editor: syntax highlighting, a language mode per field, and inline validation that tolerates work in progress.
How it works
- 1 Load the editor library lazily, only on views that use it, and render a usable plain textarea until it arrives. It must never block first paint.
- 2 Set the language mode per field from what the field actually holds, and validate against that mode.
- 3 Report syntax errors as you go, but never block typing or reset the content. Half-written JSON is a normal intermediate state; only submission should be gated.
Copy the prompt
No account needed
Add this feature to my app:
https://addthisfeature.com/x/code-editor-field
How it works
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1
Copy the link
Grab the Markdown instruction URL for this feature.
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2
Give it to your AI
Paste it into Claude Code, Cursor, v0, Lovable — whatever you build with.
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It inspects, then implements
Your agent reads your existing app first, then adds the feature to fit it.
Works with your stack
These instructions are written to adapt. They tell the agent to detect your framework, match your existing design system, and reuse what you already have — rather than assuming a particular stack.
Need it tighter than that? Customize the feature and tell it exactly what you're running.