04Common-value penalty — the strength value is docked when the input value matches an entry in a preset common-value list

<main class="stage">
<div class="cl is-demo" id="cl">
  <label class="cl__field">
    <input class="cl__input" id="clInput" type="text" autocomplete="off" spellcheck="false" value="">
  </label>
  <div class="cl__track"><div class="cl__fill" id="clFill"></div></div>
  <div class="cl__row">
    <span class="cl__score">Value <b id="clScore">0</b>/100</span>
    <span class="cl__warn" id="clWarn">Common value <b id="clPenalty">-40</b></span>
  </div>
</div>
</main>

@use "../../../../site/static/demo-tokens" as *;

// 계산 겹: 길이 기반 기본 점수에서, 값이 가상 흔한 값 목록과 완전히 일치하면
// 고정 감점(-40)을 적용한다 — 목록 포함 여부가 곧 감점 여부를 가르는 분기다.
@include stage($stage-paper);

.cl {
  width: 100%;
  max-width: 320px;
  display: grid;
  gap: $sp-3;
}

.cl__field { display: block; }

.cl__input {
  width: 100%;
  box-sizing: border-box;
  padding: $sp-3 $sp-4;
  border-radius: $r-control;
  border: 0;
  background: $subject-blue-light;
  color: $subject-blue-deep;
  font: 500 16px/1.3 -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  letter-spacing: .04em;
  -webkit-text-security: disc;

  &:focus { outline: 2px solid $subject-blue-deep; outline-offset: 2px; }
}

.cl__track {
  position: relative;
  height: $sp-3;
  border-radius: $r-sm;
  background: rgba($subject-blue-deep, .14);
  overflow: hidden;
}

.cl__fill {
  position: absolute;
  inset: 0;
  border-radius: $r-sm;
  background: $subject-blue;
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform $dur-base $ease-out, background-color $dur-base $ease-out;
}

.cl--hit .cl__fill { background: $error; }

.cl__row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: $sp-2;
  font: 600 13px/1.2 -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  color: $subject-blue-deep;
}

.cl__score b { font-variant-numeric: tabular-nums; }

.cl__warn {
  color: $error;
  opacity: 0;
  transform: scale(.7);
  transform-origin: right center;
  transition: opacity $dur-base $ease-out, transform $dur-base $ease-out;
}

@media (max-width: 340px) {
  .cl { max-width: 260px; }
  .cl__input { padding: $sp-2 $sp-3; font-size: 14px; }
  .cl__row { font-size: 11px; }
}

@media (prefers-reduced-motion: reduce) {
  .cl__fill, .cl__warn { transition: none; }
}

html, body {
  margin: 0;
  overflow: hidden;
}

.stage {
  box-sizing: border-box;
  min-height: 100vh;
  display: grid;
  place-items: center;
  margin: 0;
  background: #ffffff;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  padding: clamp(8px, 4vw, 24px);
}

.cl {
  width: 100%;
  max-width: 320px;
  display: grid;
  gap: 12px;
}

.cl__field {
  display: block;
}

.cl__input {
  width: 100%;
  box-sizing: border-box;
  padding: 12px 16px;
  border-radius: 12px;
  border: 0;
  background: #5b8cf8;
  color: #0a4fe8;
  font: 500 16px/1.3 -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  letter-spacing: 0.04em;
  -webkit-text-security: disc;
}
.cl__input:focus {
  outline: 2px solid #0a4fe8;
  outline-offset: 2px;
}

.cl__track {
  position: relative;
  height: 12px;
  border-radius: 8px;
  background: rgba(10, 79, 232, 0.14);
  overflow: hidden;
}

.cl__fill {
  position: absolute;
  inset: 0;
  border-radius: 8px;
  background: #2f6df6;
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 300ms ease-out, background-color 300ms ease-out;
}

.cl--hit .cl__fill {
  background: #c2361a;
}

.cl__row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  font: 600 13px/1.2 -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  color: #0a4fe8;
}

.cl__score b {
  font-variant-numeric: tabular-nums;
}

.cl__warn {
  color: #c2361a;
  opacity: 0;
  transform: scale(0.7);
  transform-origin: right center;
  transition: opacity 300ms ease-out, transform 300ms ease-out;
}

@media (max-width: 340px) {
  .cl {
    max-width: 260px;
  }
  .cl__input {
    padding: 8px 12px;
    font-size: 14px;
  }
  .cl__row {
    font-size: 11px;
  }
}
@media (prefers-reduced-motion: reduce) {
  .cl__fill, .cl__warn {
    transition: none;
  }
}

(function () {
  var root = document.getElementById('cl');
  var input = document.getElementById('clInput');
  var fill = document.getElementById('clFill');
  var scoreEl = document.getElementById('clScore');
  var warn = document.getElementById('clWarn');

  // 계산 겹: 가상 Common value 소형 목록(일반 패턴형 10개, 외부 유출 목록 아님) — 실제 서비스명 0.
  var COMMON = ['password', '123456', 'qwerty', '111111', 'abc123',
                'letmein', 'iloveyou', 'admin', 'welcome', 'monkey'];
  var PENALTY = 40;

  function scoreOf(value) {
    var base = Math.min(100, value.length * 8);
    var hit = value.length > 0 && COMMON.indexOf(value.toLowerCase()) !== -1;
    var score = hit ? Math.max(0, base - PENALTY) : base;
    return { score: score, hit: hit };
  }

  function paint(value) {
    var r = scoreOf(value);
    fill.style.transform = 'scaleX(' + (r.score / 100) + ')';
    root.classList.toggle('cl--hit', r.hit);
    scoreEl.textContent = String(r.score);
    warn.style.opacity = r.hit ? '1' : '0';
    warn.style.transform = r.hit ? 'scale(1)' : 'scale(.7)';
  }

  input.addEventListener('input', function () {
    root.classList.remove('is-demo');
    stopAutoplay();
    paint(input.value);
  });

  paint(input.value);

  // 자동 루프: 시드 고정 문자열 배열 — 흔한 값과 일반 값을 번갈아 입력한다.
  var SEQ = ['', 'x7Ba9K2', 'password', 'x7Ba9K2Q', '123456', 'GreenTiger42', 'qwerty', ''];
  var si = 0;
  var autoTimer = null;
  function autoTick() { input.value = SEQ[si]; paint(SEQ[si]); si = (si + 1) % SEQ.length; }
  function stopAutoplay() { if (autoTimer) { clearInterval(autoTimer); autoTimer = null; } }
  var reduce = window.matchMedia('(prefers-reduced-motion: reduce)').matches;
  if (!reduce) { autoTimer = setInterval(autoTick, 360); autoTick(); }
})();

import { useEffect, useRef } from "react";
import styles from "./CommonListPenalty.module.scss";

type Box<T> = { current: T };

const PENALTY = 40;

export default function CommonListPenalty() {
  const rootRef = useRef(null) as unknown as Box<HTMLDivElement | null>;

  useEffect(() => {
    const root = rootRef.current;
    if (!root) return;
    const input = root.querySelector(`.${styles.input}`) as HTMLInputElement | null;
    const fill = root.querySelector(`.${styles.fill}`) as HTMLElement | null;
    const scoreEl = root.querySelector(`.${styles.scoreNum}`) as HTMLElement | null;
    const warn = root.querySelector(`.${styles.warn}`) as HTMLElement | null;
    if (!input || !fill || !scoreEl || !warn) return;

    // 계산 겹: 가상 흔한 값 소형 목록(일반 패턴형 10개, 외부 유출 목록 아님) — 실제 서비스명 0.
    const COMMON = ["password", "123456", "qwerty", "111111", "abc123",
      "letmein", "iloveyou", "admin", "welcome", "monkey"];

    function scoreOf(value: string) {
      const base = Math.min(100, value.length * 8);
      const hit = value.length > 0 && COMMON.indexOf(value.toLowerCase()) !== -1;
      const score = hit ? Math.max(0, base - PENALTY) : base;
      return { score, hit };
    }

    function paint(value: string) {
      const r = scoreOf(value);
      fill!.style.transform = "scaleX(" + r.score / 100 + ")";
      root!.classList.toggle(styles["cl--hit"], r.hit);
      scoreEl!.textContent = String(r.score);
      warn!.style.opacity = r.hit ? "1" : "0";
      warn!.style.transform = r.hit ? "scale(1)" : "scale(.7)";
    }

    function onInput() {
      root!.classList.remove(styles["is-demo"]);
      stopAutoplay();
      paint(input!.value);
    }
    input.addEventListener("input", onInput);
    paint(input.value);

    // 자동 루프: 시드 고정 문자열 배열 — 흔한 값과 일반 값을 번갈아 입력한다.
    const SEQ = ["", "x7Ba9K2", "password", "x7Ba9K2Q", "123456", "GreenTiger42", "qwerty", ""];
    let si = 0;
    let autoTimer: number | null = null;
    function autoTick() { input!.value = SEQ[si]; paint(SEQ[si]); si = (si + 1) % SEQ.length; }
    function stopAutoplay() { if (autoTimer !== null) { window.clearInterval(autoTimer); autoTimer = null; } }
    const reduce = window.matchMedia("(prefers-reduced-motion: reduce)").matches;
    if (!reduce) { autoTimer = window.setInterval(autoTick, 360); autoTick(); }

    return () => {
      stopAutoplay();
      input.removeEventListener("input", onInput);
    };
  }, []);

  return (
    <div ref={rootRef} className={`${styles.stage} ${styles.cl} ${styles["is-demo"]}`}>
      <label className={styles.field}>
        <input className={styles.input} type="text" autoComplete="off" spellCheck={false} defaultValue="" />
      </label>
      <div className={styles.track}><div className={styles.fill} /></div>
      <div className={styles.row}>
        <span className={styles.score}>값 <b className={styles.scoreNum}>0</b>/100</span>
        <span className={styles.warn}>흔한 값 <b>-{PENALTY}</b></span>
      </div>
    </div>
  );
}