每行首字母转大写

<!DOCTYPE html>
<html lang="en">
  <head>
    <title>Document</title>
  </head>
  <body>
    <textarea name="t1" id="t1" cols="30" rows="10"></textarea>
    <textarea name="t2" id="t2" cols="30" rows="10"></textarea>
    <br>
    <input type="button" value="转换" onclick="trans()" />
  </body>
  <script>
    function trans() {
      let t1 = document.querySelector('[name="t1"]')
      let t2 = document.querySelector('[name="t2"]')
  
      let traList = t1.value.split('\n')
      let outList = []
      traList.map(item=>{
        outList.push(item.replace(item[0],item[0].toUpperCase()))
      })
      t2.value = outList.join('\n');
    }
  </script>
</html>

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上次更新: 2022/08/24, 22:35:57

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