A tag input component created using Shadcn UI

Shadcn Tag Input is a tag input component implementation of Shadcn’s input component. It’s customizable, but styled by default (Shadcn’s default styling).

View Demo View Github

Setup

Run the shadcn-ui init command to setup your project:

npx shadcn-ui@latest init

Run the shadcn-ui add command to add the tag input component to your project:

npx shadcn-ui@latest add input

Copy and paste the folowing code into a new file:

import React from 'react';
import { Input } from './ui/input';
import { Button } from './ui/button';
import { X } from 'lucide-react';
import { cn } from '@/lib/utils';

interface TagInputProps extends React.InputHTMLAttributes<HTMLInputElement> {
  placeholder?: string;
  tags: string[];
  setTags: React.Dispatch<React.SetStateAction<string[]>>;
}

const TagInput = React.forwardRef<HTMLInputElement, TagInputProps>((props, ref) => {

    const { placeholder, tags, setTags, className } = props;

    const [inputValue, setInputValue] = React.useState('');
    const inputRef = React.useRef<HTMLInputElement>(null);

    const handleInputChange = (e: React.ChangeEvent<HTMLInputElement>) => {
        setInputValue(e.target.value);
    };

    const handleKeyDown = (e: React.KeyboardEvent<HTMLInputElement>) => {
        
        if (e.key === 'Enter' || e.key === ',') {
            e.preventDefault();
            const newTag = inputValue.trim();
            if (newTag && !tags.includes(newTag)) {
                setTags([...tags, newTag]);
            }
            setInputValue('');
        }
    };

    const removeTag = (tagToRemove: string) => {
        setTags(tags.filter((tag) => tag !== tagToRemove));
    };

    return (
        <div>
            <div className={`flex flex-wrap gap-2 rounded-md ${tags.length !== 0 && 'mb-3'}`}>
                {tags.map((tag, index) => (
                    <span key={index} className="transition-all border bg-secondary text-secondary-foreground hover:bg-secondary/80 inline-flex h-8 items-center text-sm pl-2 rounded-md">
                        {tag}
                        <Button
                            type="button" 
                            variant="ghost"
                            onClick={() => removeTag(tag)}
                            className={cn("py-1 px-3 h-full hover:bg-transparent")}
                        >
                            <X size={14} />
                        </Button>
                    </span>
                ))}
            </div>
            <Input
                ref={inputRef}
                type="text"
                placeholder={placeholder}
                value={inputValue}
                onChange={handleInputChange}
                onKeyDown={handleKeyDown}
                className={className}
            />
        </div>
    );
});

TagInput.displayName = 'TagInput';

export { TagInput };

Usage

import {
      Form,
      FormControl,
      FormDescription,
      FormField,
      FormItem,
      FormLabel,
      FormMessage,
    } from "@/components/ui/form"
    import React from 'react'
    import { TagInput } from '@/components/tag-input'

    const FormSchema = z.object({
      topics: z.array(z.string()),
    })

    const [tags, setTags] = React.useState<string[]>([]);

    const { setValue } = form;

    function onSubmit(data: z.infer<typeof FormSchema>) {
      toast({
        title: "You submitted the following values:",
        description: (
          <pre className="mt-2 w-[340px] rounded-md bg-slate-950 p-4">
            <code className="text-white">{JSON.stringify(data, null, 2)}</code>
          </pre>
        ),
      })
    }

    <Form {...form}>
      <form onSubmit={form.handleSubmit(onSubmit)} className="space-y-8">
        <FormField
          control={form.control}
          name="topics"
          render={({ field }) => (
            <FormItem>
              <FormLabel>Topics</FormLabel>
              <FormControl>
                <TagInput
                  {...field}
                  placeholder="Enter a topic"
                  tags={tags}
                  className='sm:min-w-[450px]'
                  setTags={(newTags) => {
                    setTags(newTags);
                    setValue("topics", newTags as [string, ...string[]]);
                  }} 
                />
              </FormControl>
              <FormDescription>
                These are the topics that you&apos;re interested in.
              </FormDescription>
              <FormMessage />
            </FormItem>
          )}
        />
        <Button type="submit">Submit</Button>
      </form>
    </Form>