dondefelipe/generador-qr.html at main · fjimenez321-stack/dondefelipe · GitHub

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<!DOCTYPE html>
<html lang="es">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0, viewport-fit=cover">
<title>Generador de QR | El Rincón de Felipe</title>
<link rel="preconnect" href="https://fonts.googleapis.com">
<link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
<link href="https://fonts.googleapis.com/css2?family=Cinzel:wght@600;700&family=Outfit:wght@300;400;500;600;700&display=swap" rel="stylesheet">
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.5.1/css/all.min.css">
<style>
:root{
  --sea:#1a4068; --sea-deep:#0c2138; --gold:#c9a84c; --gold-dark:#8b6914;
  --laurel:#2e7d52; --violet:#6d3bb5;
  --ink:#2a1f10; --ink-soft:#4a3820;
  --paper:#fdfbf7; --paper-2:#f4efe4; --line:rgba(139,105,20,.22);
  --ff-title:'Cinzel',Palatino,serif;
  --ff-body:'Outfit',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0;}
html{-webkit-text-size-adjust:100%;}
body{
  font-family:var(--ff-body); color:var(--ink); background:var(--paper);
  -webkit-font-smoothing:antialiased; padding:18px 16px 32px;
  background-image:
    radial-gradient(ellipse 70% 40% at 50% -5%, rgba(201,168,76,.08), transparent 60%);
}
.wrap{ max-width:560px; margin:0 auto; }

.head{ text-align:center; margin-bottom:1.3rem; }
.head h1{
  font-family:var(--ff-title); font-size:1.35rem; letter-spacing:1px;
  color:var(--sea-deep); display:flex; align-items:center; justify-content:center; gap:10px;
}
.head h1 i{ color:var(--violet); }
.head p{ font-size:.82rem; color:var(--ink-soft); margin-top:.3rem; }

.card{
  background:linear-gradient(180deg,#fff,var(--paper-2));
  border:1px solid var(--line); border-radius:16px;
  padding:1.2rem 1.1rem; box-shadow:0 10px 30px rgba(60,40,10,.1);
}

label{ display:block; font-size:.72rem; font-weight:700; letter-spacing:.06em;
  text-transform:uppercase; color:var(--gold-dark); margin:0 0 6px 2px; }

textarea, select, input[type="text"]{
  width:100%; font-family:var(--ff-body); font-size:1rem; color:var(--ink);
  background:#fff; border:1.5px solid var(--line); border-radius:10px;
  padding:12px 14px; transition:border-color .2s, box-shadow .2s;
}
textarea{ min-height:92px; resize:vertical; line-height:1.4; }
textarea:focus, select:focus, input:focus{
  outline:none; border-color:var(--violet); box-shadow:0 0 0 3px rgba(109,59,181,.15);
}

.row{ display:flex; gap:12px; flex-wrap:wrap; margin-top:1rem; }
.row > div{ flex:1; min-width:130px; }

.colors{ display:flex; gap:12px; margin-top:1rem; }
.colors > div{ flex:1; }
.color-field{ display:flex; align-items:center; gap:10px;
  background:#fff; border:1.5px solid var(--line); border-radius:10px; padding:6px 10px; }
.color-field input[type="color"]{
  -webkit-appearance:none; appearance:none; width:34px; height:34px;
  border:none; border-radius:8px; background:none; cursor:pointer; padding:0;
}
.color-field input[type="color"]::-webkit-color-swatch{ border:1px solid var(--line); border-radius:8px; }
.color-field input[type="color"]::-moz-color-swatch{ border:1px solid var(--line); border-radius:8px; }
.color-field span{ font-size:.8rem; color:var(--ink-soft); font-weight:600; }

.actions{ display:flex; gap:12px; margin-top:1.3rem; flex-wrap:wrap; }
button.act{
  flex:1; min-width:150px; padding:14px 16px; border:none; border-radius:11px; cursor:pointer;
  font-family:var(--ff-title); font-size:.78rem; letter-spacing:.1em;
  display:flex; align-items:center; justify-content:center; gap:9px;
  transition:transform .15s, filter .2s, box-shadow .2s;
}
button.act:active{ transform:translateY(1px); }
.btn-gen{ background:linear-gradient(135deg,var(--violet),#8b5cf6); color:#fff;
  box-shadow:0 8px 20px rgba(109,59,181,.32); }
.btn-gen:hover{ filter:brightness(1.07); }
.btn-dl{ background:linear-gradient(135deg,var(--laurel),#22c55e); color:#fff;
  box-shadow:0 8px 20px rgba(46,125,82,.3); }
.btn-dl:hover{ filter:brightness(1.07); }
.btn-dl:disabled{ background:#d7d2c6; color:#fff; box-shadow:none; cursor:not-allowed; }

.result{
  margin-top:1.3rem; display:flex; flex-direction:column; align-items:center; gap:.7rem;
}
.qr-box{
  background:#fff; border:1px solid var(--line); border-radius:14px;
  padding:16px; box-shadow:0 6px 20px rgba(60,40,10,.12);
  display:inline-flex; min-width:120px; min-height:120px;
  align-items:center; justify-content:center;
}
.qr-box img, .qr-box canvas{ display:block; max-width:100%; height:auto; border-radius:4px; }
.hint{ font-size:.78rem; color:var(--ink-soft); text-align:center; }
.error{ color:#b3261e; font-weight:600; }
.placeholder{ color:#b8ad95; font-size:.85rem; text-align:center; padding:20px; }

@media (max-width:430px){
  .head h1{ font-size:1.15rem; }
  button.act{ min-width:100%; }
}
</style>
</head>
<body>
<div class="wrap">

  <div class="head">
    <h1><i class="fa-solid fa-qrcode"></i> Generador de Códigos QR</h1>
    <p>Crea un QR para un enlace, texto o dato y descárgalo en PNG.</p>
  </div>

  <div class="card">
    <label for="txt">Contenido (URL o texto)</label>
    <textarea id="txt" placeholder="https://elrincondefelipe.cl  ·  o cualquier texto…">https://</textarea>

    <div class="row">
      <div>
        <label for="size">Tamaño</label>
        <select id="size">
          <option value="160">Pequeño (160 px)</option>
          <option value="256" selected>Mediano (256 px)</option>
          <option value="384">Grande (384 px)</option>
          <option value="512">Extra grande (512 px)</option>
        </select>
      </div>
      <div>
        <label for="ecl">Corrección de error</label>
        <select id="ecl">
          <option value="L">Baja (L)</option>
          <option value="M" selected>Media (M)</option>
          <option value="Q">Alta (Q)</option>
          <option value="H">Máxima (H)</option>
        </select>
      </div>
    </div>

    <div class="colors">
      <div>
        <label>Color del código</label>
        <div class="color-field">
          <input type="color" id="dark" value="#0c2138">
          <span id="darkHex">#0c2138</span>
        </div>
      </div>
      <div>
        <label>Color de fondo</label>
        <div class="color-field">
          <input type="color" id="light" value="#ffffff">
          <span id="lightHex">#ffffff</span>
        </div>
      </div>
    </div>

    <div class="actions">
      <button class="act btn-gen" id="gen"><i class="fa-solid fa-bolt"></i> GENERAR QR</button>
      <button class="act btn-dl" id="dl" disabled><i class="fa-solid fa-download"></i> DESCARGAR PNG</button>
    </div>

    <div class="result">
      <div class="qr-box" id="qrbox"><div class="placeholder">Tu código QR aparecerá aquí</div></div>
      <div class="hint" id="hint">Sugerencia: para imprimir, usa tamaño grande y corrección Alta o Máxima.</div>
    </div>
  </div>

</div>

<script>
(function loadQR(srcs, i){
  i = i || 0;
  if (i >= srcs.length) return;
  var s = document.createElement('script');
  s.src = srcs[i];
  s.onload = function(){ window._qrReady = true; };
  s.onerror = function(){ loadQR(srcs, i + 1); };
  document.head.appendChild(s);
})([
  'https://cdnjs.cloudflare.com/ajax/libs/qrcodejs/1.0.0/qrcode.min.js',
  'https://cdn.jsdelivr.net/npm/qrcodejs@1.0.0/qrcode.min.js'
]);

var box   = document.getElementById('qrbox');
var hint  = document.getElementById('hint');
var dlBtn = document.getElementById('dl');

function setHint(msg, isError){
  hint.textContent = msg;
  hint.className = 'hint' + (isError ? ' error' : '');
}

function syncHex(input, label){
  input.addEventListener('input', function(){ label.textContent = input.value; });
}
syncHex(document.getElementById('dark'),  document.getElementById('darkHex'));
syncHex(document.getElementById('light'), document.getElementById('lightHex'));

function generate(){
  var text = document.getElementById('txt').value.trim();
  if(!text || text === 'https://'){
    setHint('Escribe un enlace o texto primero.', true);
    return;
  }
  if(typeof QRCode === 'undefined'){
    setHint('Cargando la librería de QR… intenta de nuevo en un segundo.', true);
    return;
  }

  var size  = parseInt(document.getElementById('size').value, 10);
  var dark  = document.getElementById('dark').value;
  var light = document.getElementById('light').value;
  var eclMap = { L:QRCode.CorrectLevel.L, M:QRCode.CorrectLevel.M, Q:QRCode.CorrectLevel.Q, H:QRCode.CorrectLevel.H };
  var ecl = eclMap[document.getElementById('ecl').value] || QRCode.CorrectLevel.M;

  box.innerHTML = '';
  try{
    new QRCode(box, {
      text: text, width: size, height: size,
      colorDark: dark, colorLight: light, correctLevel: ecl
    });
    dlBtn.disabled = false;
    setHint('¡Listo! Ya puedes descargar tu QR en PNG.', false);
  }catch(e){
    box.innerHTML = '<div class="placeholder">No se pudo generar</div>';
    dlBtn.disabled = true;
    setHint('El texto es demasiado largo para este nivel de corrección. Prueba con corrección Baja o un texto más corto.', true);
  }
}

function download(){
  var canvas = box.querySelector('canvas');
  var img = box.querySelector('img');
  var dataURL;
  if(canvas){ dataURL = canvas.toDataURL('image/png'); }
  else if(img && img.src){ dataURL = img.src; }
  if(!dataURL){ setHint('Genera un QR antes de descargar.', true); return; }

  var a = document.createElement('a');
  a.href = dataURL;
  a.download = 'codigo-qr.png';
  document.body.appendChild(a);
  a.click();
  document.body.removeChild(a);
}

document.getElementById('gen').addEventListener('click', generate);
document.getElementById('dl').addEventListener('click', download);
document.getElementById('txt').addEventListener('keydown', function(e){
  if(e.key === 'Enter' && (e.metaKey || e.ctrlKey)){ generate(); }
});
</script>

</body>
</html>