30-seconds-of-code/snippets/TagInput.md

title, tags

title	tags
TagInput	visual,input,intermediate

Renders an input field to add tags.

• Define a TagInput component and use React.useState() hook to initialize an empty array of tags.
• Use Array.prototype.map on collected nodes to render the list of tags.
• Define addTab, which will be executed on pressing Enter key.
• addTab uses the setTabs to add the new tag using the spread operator to prepend the existing tags and adds the new tag at the end of the tags array.
• Define removeTab, which will executed on clicking the delete icon in the tag.
• Use the Array.prototyp.filter in removeTab to remove the tag using the index of the tag to filter it out from tags array.

.tag-input {
  display: flex;
  align-items: flex-start;
  flex-wrap: wrap;
  min-height: 48px;
  width: 480px;
  padding: 0 8px;
  border: 1px solid rgb(214, 216, 218);
  border-radius: 6px;
}

.tag-input input {
  flex: 1;
  border: none;
  height: 46px;
  font-size: 14px;
  padding: 4px 0 0;
  &:focus {
      outline: transparent;
  }
}

#tags {
  display: flex;
  flex-wrap: wrap;
  padding: 0;
  margin: 8px 0 0;
}

.tag {
  width: auto;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  padding: 0 8px;
  font-size: 14px;
  list-style: none;
  border-radius: 6px;
  margin: 0 8px 8px 0;
  background: #0052cc;
}

.tag span {
  margin-top: 3px;
}

.tag i {
  width: 16px;
  height: 16px;
  line-height: 16px;
  text-align: center;
  font-size: 14px;
  margin-left: 8px;
  color: #0052cc;
  border-radius: 50%;
  background: #fff;
  cursor: pointer;
}

function TagInput() {
  const [tags, setTags] = React.useState(['NodeJs', 'MongoDB'])
  const removeTags = indexToRemove => {
    setTags([...tags.filter((_, index) => index !== indexToRemove)])
  }
  const addTags = event => {
    if (event.target.value !== '') {
      setTags([...tags, event.target.value])
      event.target.value = ''
    }
  }
  return (
    <div className='tags-input'>
      <ul id='tags'
        {tags.map((tag, index) => (
          <li key={index} className='tag'
            <span>{tag}</span>
            <i
              onClick={() => removeTags(index)}
            >
              x
            </i>
          </li>
        ))}
      </ul>
      <input
        type='text'
        onKeyUp={event =>
          event.key === 'Enter' ? addTags(event) : null
        }
        placeholder='Press enter to add tags'
      />
    </div>
  )
}

ReactDOM.render(<TagInput />, document.getElementById('root');