我用Node.js编写了一个小型Web应用程序，其中只有一行，用户可以在其中输入一个或多个用逗号分隔的邮箱地址:
<!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>eHaW Email</title>
<link rel="stylesheet" href="./css/bootstrap.min.css">
<script src="./js/bootstrap.bundle.min.js"></script>
</head>
<body>
<form action="/createMsg" method="POST">
<div class="form-group mb-3 mt-3 ms-1 me-1">
<label for="text" class="control-label">From:</label>
<input type="text" class="form-control" id="from"
placeholder="Enter your name" name="from"
required />
</div>
<div class="form-group mb-3 mt-3 ms-1 me-1">
<label for="email" class="control-label">To:</label>
<input type="email" multiple class="form-control" id="to"
placeholder="Enter 1 or more email addresses, separated by commas ','" name="email" required />
<button type="button" id="addComma" onclick="insertComma">,</button>
<input type="text" class="form-control" id="mType"
name="mType" readonly hidden required >
</div>
<div class="form-group mb-3 mt-3 ms-1 me-1">
<label for="msg" class="control-label">Message:</label>
<textarea type="text" class="form-control" id="message"
placeholder="Enter the message you want to send here..."
name="msg" rows="5" onkeyup="countChars(this);" required ></textarea>
<p class="text-secondary" id="charNum">1000 characters remaining</p>
</div>
<div class="mx-auto" style="width:350px" align="center">
<button type="submit" class="btn btn-outline-success">Submit</button>
</div>
</form>
<p> </p>
<div class="row">
<div class="col" align="right">
<form action="/" method="GET">
<button type="submit" class="btn btn-danger">Cancel</button>
</form>
</div>
<div class="col" align="left">
<form action="/status" method="GET">
<button type="submit" class="btn btn-warning" >Status</button>
</form>
</div>
</div>
</body>
</html>
<script>
document.getElementById("addComma").addEventListner("click", (e) => {
const item = document.getElementById("to");
item.value = += ", ";
item.focus();
});
function countChars(obj){
let maxLength = 1000;
let strLength = obj.value.length;
let charRemain = maxLength - strLength;
if(charRemain < 0){
document.getElementById("charNum").innerHTML = '<span style="color: red;">You have exceeded the limit of '+maxLength+' characters</span>';
}else{
document.getElementById("charNum").innerHTML = charRemain+' characters remaining';
}
document.getElementById("mType").value = "Email";
}
function goBack() {
window.history.back();
}
</script>
当有iPhone的人想要输入多个邮箱地址时，我遇到了一个问题，因为iPhone上的邮箱输入键盘不包括逗号字符.如果用户try 使用空格字符作为分隔符，上面的代码将声明该条目无效.
有没有办法指定另一个分隔符？