Forms interview questions

Build an autocomplete input that filters a static list and lets you pick a suggestion.

Build a textarea with a live character counter that warns as it nears a maximum length.

Build a swatch color picker where clicking a swatch selects it and previews the chosen color.

Build a contact form that posts the user's name, email, and message to a backend endpoint.

Build a small form that books either a one-way or return flight, with validation tying the two date fields together.

Build a calculator that computes the monthly payment for a loan based on principal, rate, and term inputs.

Build a password field with a live strength meter that scores the input as you type.

Build a segmented control where clicking a segment selects it and highlights the active option.

Build a widget that converts between Celsius and Fahrenheit, updating either field as the other changes.

Build an on/off toggle switch that flips state on click and slides its knob to reflect it.

Build an autocomplete that debounces typing, fetches matching results from an API, and handles loading and stale responses.

Build an editable combobox that filters options as you type and supports full keyboard selection.

Build a currency converter with two linked amount fields that recompute from an exchange rate.

Build a dice roller that lets you pick a count of six-sided dice, roll them, and display the resulting faces.

Build an emoji picker with category tabs and a search filter that inserts the chosen emoji.

Build a schema-driven form validator with composable per-field rules, cross-field checks, and async validators that report all errors.

Build a multi-select where chosen options become removable chips and the rest stay in the list.

Build a wizard form with next/back navigation, per-step validation, and a progress indicator.

Build a one-time-code input of separate boxes with auto-advance, backspace, and paste handling.

Build a dual-handle range slider that picks a min and max value by dragging each handle.

Build a cart where quantity changes update line totals and a grand total live.

Build a signup form that validates user details on submit and posts them to a back-end API.

Build an interactive star rating with hover preview and half-star support.

Build a star rating component where users click a star to set the rating shown by filled icons.

Build a Todo List component with add and delete actions, with focus on functionality over styling.

Build a component that moves selected items back and forth between two side-by-side lists.

Build a CRUD interface to list, filter, create, edit, and delete users backed by local state.

Build a six-cell auth code input that handles typing, paste, backspace, and arrow-key navigation across fields.

Build a transfer list with bulk select, deselect, and the ability to add new items to either side.