npm package discovery and stats viewer.

Discover Tips

  • General search

    [free text search, go nuts!]

  • Package details

    pkg:[package-name]

  • User packages

    @[username]

Sponsor

Optimize Toolset

I’ve always been into building performant and accessible sites, but lately I’ve been taking it extremely seriously. So much so that I’ve been building a tool to help me optimize and monitor the sites that I build to make sure that I’m making an attempt to offer the best experience to those who visit them. If you’re into performant, accessible and SEO friendly sites, you might like it too! You can check it out at Optimize Toolset.

About

Hi, 👋, I’m Ryan Hefner  and I built this site for me, and you! The goal of this site was to provide an easy way for me to check the stats on my npm packages, both for prioritizing issues and updates, and to give me a little kick in the pants to keep up on stuff.

As I was building it, I realized that I was actually using the tool to build the tool, and figured I might as well put this out there and hopefully others will find it to be a fast and useful way to search and browse npm packages as I have.

If you’re interested in other things I’m working on, follow me on Twitter or check out the open source projects I’ve been publishing on GitHub.

I am also working on a Twitter bot for this site to tweet the most popular, newest, random packages from npm. Please follow that account now and it will start sending out packages soon–ish.

Open Software & Tools

This site wouldn’t be possible without the immense generosity and tireless efforts from the people who make contributions to the world and share their work via open source initiatives. Thank you 🙏

© 2026 – Pkg Stats / Ryan Hefner

happyjurung-hooks

v0.0.15

Published

카드 등록 시 필요한 입력 값에 대한 유효성 검사를 진행할 수 있는 훅

Readme

Hooks Module

소개

카드 등록 시 카드 번호에 따른 카드사를 반환하는 훅 모듈입니다.

설치 방법

npm install happyjurung-hooks

주요 hooks

  • useCardNumbers : 카드 번호 입력을 16자리 숫자로 관리하면서 4자리씩 분할 및 검증하고, 카드사를 감지해 카드사별 포맷 문자열까지 반환하는 React 훅입니다.
  • getCardCompany : 숫자 문자열의 접두사와 전체 길이를 검사해 해당 카드사(visa, master, amex, diners, unionPay) 또는 default를 반환하는 함수입니다.

사용 예시

import React, { useState } from "react";
import useCardNumbers from "./useCardNumbers";

function CardForm() {
  const { numbers, cardType, handleCardNumberChange } = useCardNumbers();

  return (
    <div>
      <h3>카드사: {cardType || "미확인"}</h3>
      <div style={{ display: "flex", gap: 8 }}>
        {numbers.map((num, idx) => (
          <input
            key={idx}
            maxLength={4}
            value={num}
            onChange={(e) => handleCardNumberChange(e.target.value)}
            placeholder="0000"
          />
        ))}
      </div>
    </div>
  );
}

import { getCardCompany } from "./getCardCompany";

console.log(getCardCompany("4000123412341234"));
// → "visa"      (4로 시작, 길이 16)

console.log(getCardCompany("5100123412341234"));
// → "master"    (51~55로 시작, 길이 16)

console.log(getCardCompany("341234123412345"));
// → "amex"      (34 or 37로 시작, 길이 15)

console.log(getCardCompany("36123412341234"));
// → "diners"    (36으로 시작, 길이 14)

console.log(getCardCompany("6221261234123412"));
// → "unionPay"  (622126~622925 범위, 길이 16)

console.log(getCardCompany("1234123412341234"));
// → "default"   (위 조건 모두 불충분)