Singapore Government デザインシステム.

<sgds-quantity-toggle
  id="people" name="people" label="Participants"
  hintText="Choose 1 to 5 participants"
  min="1" max="5" step="1" value="1"
  hasFeedback="both"
  invalidFeedback="Enter a whole number from 1 to 5">
</sgds-quantity-toggle>
<output id="participant-total">1</output>
<script>
  customElements.whenDefined('sgds-quantity-toggle').then(() => {
    const quantity = document.querySelector('#people');
    const update = () => {
      document.querySelector('#participant-total').textContent = String(quantity.value);
    };
    ['sgds-input', 'sgds-change'].forEach(name => {
      quantity.addEventListener(name, update);
    });
  });
</script>

npm install --save-exact @govtechsg/[email protected]

/* globals.css — tokens before foundation rules */
@import "@govtechsg/sgds-web-component/themes/day.css";
@import "@govtechsg/sgds-web-component/themes/night.css";
@import "@govtechsg/sgds-web-component/css/sgds.css";
/* Only for a configured Tailwind CSS v4 build: */
/* @import "@govtechsg/sgds-web-component/css/utility.css"; */

// main.js — register custom elements once
import '@govtechsg/sgds-web-component';

// Enable the published night theme; omit class for day.
document.documentElement.classList.toggle('sgds-night-theme');

<!doctype html><html lang="en"><meta charset="utf-8"><meta name="viewport" content="width=device-width,initial-scale=1"><title>SGDS quantity specimen</title><link rel="stylesheet" href="vendor/sgds-3.29.0/themes/day.css"><link rel="stylesheet" href="vendor/sgds-3.29.0/themes/night.css"><link rel="stylesheet" href="vendor/sgds-3.29.0/css/sgds.css"><style>:root{--sgds-font-family-brand:Arial,sans-serif}*{box-sizing:border-box}body{margin:0;background:var(--sgds-bg-default);color:var(--sgds-color-default);font-family:var(--sgds-font-family-brand)}main{max-width:888px;margin:auto;padding:32px 20px}h1{font-size:var(--sgds-font-size-heading-xl);line-height:var(--sgds-line-height-xl);letter-spacing:var(--sgds-letter-spacing-tight)}h2{font-size:var(--sgds-font-size-heading-sm);line-height:var(--sgds-line-height-sm)}p{max-width:60ch;line-height:1.5}.eyebrow{color:var(--sgds-color-subtle);font-size:14px}.layout{display:grid;grid-template-columns:1fr 1fr;gap:var(--sgds-layout-gap-md);margin:32px 0}.control{border:1px solid var(--sgds-border-color-default);border-radius:var(--sgds-border-radius-md);padding:24px;background:var(--sgds-bg-alternate)}sgds-quantity-toggle{display:block;max-width:100%}dl{margin:24px 0}dt{color:var(--sgds-color-subtle)}dd{margin:0 0 16px;font-weight:600}.actions{display:flex;flex-wrap:wrap;gap:16px}#status{min-height:24px}button.native{font:inherit;background:transparent;border:1px solid var(--sgds-border-color-default);color:inherit;padding:8px 12px;border-radius:8px}button.native:focus-visible{outline:3px solid var(--sgds-primary-border-color-default);outline-offset:3px}@media(max-width:767px){.layout{grid-template-columns:1fr}.control{padding:20px}}</style><main><p class="eyebrow">Independent specimen · Community workshop planning</p><h1>Plan a small workshop group</h1><p>Adjust two bounded quantities and inspect the local summary. This example does not reserve places or equipment.</p><button class="native" id="theme" aria-pressed="false">Night theme</button><div class="layout"><section class="control"><h2>People and materials</h2><form id="planner"><sgds-quantity-toggle id="people" name="people" label="Participants" hintText="Choose 1 to 5 participants" min="1" max="5" step="1" value="1" hasFeedback="both" invalidFeedback="Enter a whole number from 1 to 5"></sgds-quantity-toggle><div style="height:24px"></div><sgds-quantity-toggle id="kits" name="kits" label="Shared material kits" hintText="Choose 0 to 3 kits" min="0" max="3" step="1" value="0" hasFeedback="both" invalidFeedback="Enter a whole number from 0 to 3"></sgds-quantity-toggle></form></section><section><h2>Current plan</h2><dl><dt>Participants</dt><dd id="p-value">1</dd><dt>Material kits</dt><dd id="k-value">0</dd></dl><p>These are demonstration limits. A real service should explain its own availability and eligibility rules.</p><div class="actions"><sgds-button id="review">Check plan</sgds-button><sgds-button id="reset" variant="outline">Reset</sgds-button></div><p id="status" role="status" aria-live="polite"></p></section></div></main><script src="vendor/sgds-3.29.0/index.umd.min.js"></script><script type="module">await Promise.all(['sgds-quantity-toggle','sgds-button'].map(x=>customElements.whenDefined(x)));const p=document.querySelector('#people'),k=document.querySelector('#kits'),status=document.querySelector('#status');await Promise.all([p.updateComplete,k.updateComplete]);const update=()=>{document.querySelector('#p-value').textContent=String(p.value);document.querySelector('#k-value').textContent=String(k.value);status.textContent=''};[p,k].forEach(x=>['sgds-input','sgds-change'].forEach(name=>x.addEventListener(name,update)));document.querySelector('#review').onclick=()=>{const validP=p.reportValidity(),validK=k.reportValidity();status.textContent=validP&&validK?'The quantities are within the demo limits. Nothing has been reserved.':'Correct the highlighted quantity before continuing.'};document.querySelector('#reset').onclick=async()=>{p.value=1;k.value=0;p.setInvalid(false);k.setInvalid(false);await Promise.all([p.updateComplete,k.updateComplete]);update()};document.querySelector('#theme').onclick=e=>{const night=document.documentElement.classList.toggle('sgds-night-theme');e.currentTarget.setAttribute('aria-pressed',String(night));e.currentTarget.textContent=night?'Day theme':'Night theme'};window.demoReady=true;</script></html>