字符串包含双字节字符时如何遍历 

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title></title>
</head>
<body>
  <div id="app">
  </div>
  <script>
    let message = 'x𠮷u'
    //无法访问“𠮷”
    for (let i = 0; i < message.length; i++) {
      console.log(message[i])
    }
    //无法访问“𠮷”
    for (let i in message) {
      console.log(message[i])
    }
    //可以访问“𠮷”
    for(let item of message) {
      console.log(item)
    }
    //可以访问“𠮷”
    let arr1 = [...message]
    arr1.forEach(item => {
      console.log(item)
    })
    //可以访问“𠮷”
    let arr2 = [...message]
    for (let i = 0; i < arr2.length; i++) {
      console.log(arr2[i])
    }
  </script>
</body>
</html>

posted @ 2021-04-23 16:47  徐同保  阅读(84)  评论(0)    收藏  举报