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Javascript Lezione 26

Mar 8th, 2022
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  1. <!DOCTYPE html>
  2. <html lang="it-IT">
  3. <head>
  4.   <meta charset="UTF-8">
  5.   <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.1.2/dist/css/bootstrap.min.css"
  6.         rel="stylesheet"
  7.   >
  8.   <style>
  9.     label {font-weight: bold; color: blue;}
  10.     #gamesPosseduti, input+button {width: 50px;}
  11.   </style>
  12.   <title>CICLI</title>
  13. </head>
  14. <body>
  15.   <div class="container">
  16.     <form id="form">
  17.  
  18.     <button type="button" id="go">GO</button>
  19.     <select id="anno">
  20.  
  21.  
  22.     </select>
  23.    
  24.     </form>
  25.   </div>
  26.  
  27.  
  28.   <script>
  29.     //otteniamo un riferimento al bottone nel DOM
  30.     let rifBottone = document.querySelector("#go");
  31.     rifBottone.addEventListener("click", generaDropDownlist);
  32.  
  33.     function generaDropDownlist()
  34.     {
  35.         let annoPartenza = prompt("Da che anno parto? ");
  36.         let annoArrivo = new Date().getFullYear();
  37.         let elenco = document.querySelector("#anno");
  38.                  
  39.         for (let anno=annoArrivo, progressivo=1 ;anno>=annoPartenza; anno--, progressivo++)
  40.         {
  41.           //<option value="1">2022</option>          
  42.          
  43.           let nuovaOption = document.createElement('option');
  44.           nuovaOption.innerText = anno;
  45.           nuovaOption.value=progressivo;
  46.          
  47.           elenco.appendChild(nuovaOption);
  48.  
  49.         }  
  50.     }
  51.   </script>
  52.  
  53. </body>
  54. </html>
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