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mediumMachine Coding

Build a Tag / Chip Input

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01

Understand the problem

Build an input that turns entries into removable tag chips.

ReactInputChips
02

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03

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Building a Tag / Chip Input in React

Mental model: A tag input is an array of strings rendered as chips, plus a text field. Enter (or comma) commits the current text as a chip; Backspace on an empty field removes the last chip. Dedupe and trim on commit. Keep it controlled so the parent owns the tags.

Step

Solution ready — 2 min read

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04

React solution

Complete solutionRun Playground
import React, { useState } from 'react';
import TagInput from './src/TagInput';

export default function App() {
  const [tags, setTags] = useState(['react', 'vue']);
  return (
    <div style={{ fontFamily: 'sans-serif', padding: 20 }}>
      <h1>Tag Input Demo</h1>
      <TagInput value={tags} onChange={setTags} placeholder="Add a tag…" />
      <p style={{ color: '#666' }}>Tags: {tags.join(', ') || '(none)'}</p>
    </div>
  );
}
05

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Transmission complete // awaiting log

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Dossier 31 of 87 decoded in the Frontend Machine Coding track. One more won't hurt.

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