使用JQuery遍历多个输入字段

我有一个简单的模式，当打开时，允许用户通过JQuery单击加号图标来添加多个名称。

我目前遇到的问题是，我需要捕获输入所有名称字段的数据，并将其格式化为JSON数组，以便发布数据。我可以注销第一个字段，但不能注销任何其他字段。下面列出了简化代码，但可以在此处查看完整版本。

<div class="modal-body">
<ul class="nav nav-tabs" id="myTab" role="tablist">
<li class="nav-item">
<a class="nav-link active" id="users-tab" data-toggle="tab" href="#users" role="tab" aria-controls="users" aria-selected="true">Users</a>
</li>
<li class="nav-item">
<a class="nav-link" id="groups-tab" data-toggle="tab" href="#groups" role="tab" aria-controls="groups" aria-selected="false">Groups</a>
</li>
</ul>
<div class="tab-content" id="myTabContent">
<!-- Content for the users tab -->
<div class="tab-pane fade show active" id="users" role="tabpanel" aria-labelledby="users-tab">
<div class="wrapper">
<div class="users">
<u><h6>Name</h6></u>
<form id="input" action="modal.php" method="post">
<span id="name"></span>
</form>
</div>
<div class="permissions">
</div>
</div>
</div>
<!-- Content for the groups tab -->
<div class="tab-pane fade" id="groups" role="tabpanel" aria-labelledby="groups-tab">
Group Level Permissions
</div>
</div>
</div>
<div class="modal-footer">
<button type="button" class="btn btn-success" id="new_rule"><i class="fas fa-plus"></i></button>
<button type="button" class="btn btn-primary" data-dismiss="modal" data-toggle="modal" data-target="#saved" id="save">Save</button>
</div>
</div>
</div>
</div>
<script type="text/javascript">
$(document).ready(function(){
$("#new_rule").click(function(){
var input = "<input type='text' name='name' placeholder='name' class='form-control' id='name_input'>";
$("#name").prepend(input);
});
$("#save").click(function(){
var value = $("#name_input").val();
console.log(value);
});
});
</script>

尝试下面的代码片段。

捕获输入所有名称字段的数据

var value = $("input[name='name']") .map(function() { return $(this).val(); }).get();
将它们格式化为JSON数组

var jsonStr = JSON.stringify(value);

$(document).ready(function() {
$("#new_rule").click(function() {
var input = "<input type='text' name='name' placeholder='name' class='form-control'>";
$("#name").prepend(input);
});
$("#save").click(function() {
var value = $("input[name='name']")
.map(function() {
return $(this).val();
}).get();
var jsonStr = JSON.stringify(value);
console.log(jsonStr);
});
});

<!doctype html>
<html lang="en">
<head>
<!-- Required meta tags -->
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<!-- Bootstrap CSS -->
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css" integrity="sha384-MCw98/SFnGE8fJT3GXwEOngsV7Zt27NXFoaoApmYm81iuXoPkFOJwJ8ERdknLPMO" crossorigin="anonymous">
<!-- Font Awesome -->
<link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.5.0/css/all.css" integrity="sha384-B4dIYHKNBt8Bc12p+WXckhzcICo0wtJAoU8YZTY5qE0Id1GSseTk6S+L3BlXeVIU" crossorigin="anonymous">
<title>Modal</title>
<style media="screen">
.wrapper>div {
background: #eee;
padding: 1em;
}
.wrapper>div:nth-child(odd) {
background: #ddd;
}
.wrapper {
display: grid;
grid-template-columns: 70% 30%;
}
</style>
</head>
<body>
<!-- Button trigger modal -->
<div class="permissions">
<button type="button" class="btn btn-primary" data-toggle="modal" data-target="#new">
Permissions
</button>
</div>
<!-- Modal -->
<div class="modal fade new" id="new" tabindex="-1" role="dialog" aria-labelledby="new_modal" aria-hidden="true">
<div class="modal-dialog modal-dialog-centered" role="document">
<div class="modal-content">
<div class="modal-header">
<h5 class="modal-title" id="permissions">Permissions</h5>
<button type="button" class="close" data-dismiss="modal" aria-label="Close">
<span aria-hidden="true"><i class="fas fa-times"></i></span>
</button>
</div>
<div class="modal-body">
<ul class="nav nav-tabs" id="myTab" role="tablist">
<li class="nav-item">
<a class="nav-link active" id="users-tab" data-toggle="tab" href="#users" role="tab" aria-controls="users" aria-selected="true">Users</a>
</li>
<li class="nav-item">
<a class="nav-link" id="groups-tab" data-toggle="tab" href="#groups" role="tab" aria-controls="groups" aria-selected="false">Groups</a>
</li>
</ul>
<div class="tab-content" id="myTabContent">
<!-- Content for the users tab -->
<div class="tab-pane fade show active" id="users" role="tabpanel" aria-labelledby="users-tab">
<div class="wrapper">
<div class="users">
<u><h6>Name</h6></u>
<form id="input" action="modal.php" method="post">
<span id="name"></span>
</form>
</div>
<div class="permissions">
</div>
</div>
</div>
<!-- Content for the groups tab -->
<div class="tab-pane fade" id="groups" role="tabpanel" aria-labelledby="groups-tab">
Group Level Permissions
</div>
</div>
</div>
<div class="modal-footer">
<button type="button" class="btn btn-success" id="new_rule"><i class="fas fa-plus"></i></button>
<button type="button" class="btn btn-primary" data-dismiss="modal" data-toggle="modal" data-target="#saved" id="save">Save</button>
</div>
</div>
</div>
</div>
<!-- Saved Modal -->
<div class="modal fade" id="saved" tabindex="-1" role="dialog" aria-labelledby="saved" aria-hidden="true">
<div class="modal-dialog modal-dialog-centered" role="document">
<div class="modal-content">
<div class="modal-header">
<h5 class="modal-title" id="exampleModalLongTitle">Save Changes</h5>
<button type="button" class="close" data-dismiss="modal" aria-label="Close">
<span aria-hidden="true">&times;</span>
</button>
</div>
<div class="modal-body">
<p>Are you sure you would like to save the following changes?</p>
<div class="wrapper">
<div class="users">
<u><h6>Name</h6></u>
<span id="name"></span>
</div>
</div>
</div>
<div class="modal-footer">
<button type="button" class="btn btn-primary" data-dismiss="modal">Dismiss</button>
</div>
</div>
</div>
</div>
<!-- Optional JavaScript -->
<!-- jQuery first, then Popper.js, then Bootstrap JS -->
<script src="https://code.jquery.com/jquery-3.3.1.js" integrity="sha256-2Kok7MbOyxpgUVvAk/HJ2jigOSYS2auK4Pfzbm7uH60=" crossorigin="anonymous"></script>
<script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.3/umd/popper.min.js" integrity="sha384-ZMP7rVo3mIykV+2+9J3UJ46jBk0WLaUAdn689aCwoqbBJiSnjAK/l8WvCWPIPm49" crossorigin="anonymous"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.min.js" integrity="sha384-ChfqqxuZUCnJSK3+MXmPNIyE6ZbWh2IMqE241rYiqJxyMiZ6OW/JmZQ5stwEULTy" crossorigin="anonymous"></script>
</body>
</html>

也许尝试这个方法只是为了获得值的数组，然后对它们执行任何您想要的操作，这适用于"text"类型的输入字段，但您可以按照自己想要的方式进行调整。该功能被分配给按钮的onClick事件。

<script>
var GetFieldValues = function(){
var values=[];
$("input[type='text']").each(function(){
values.push($(this).val());
});
console.log(values);
}
</script>

您可以使用serializeArray()函数序列化表单输入。这将返回一个查询字符串，然后可以将其转换为JSON.stringify()中的JSON对象，并添加一个添加了每个名称的数组。

$(document).ready(function(){
$("#new_rule").click(function(){
var input = "<input type='text' name='name' placeholder='name' class='form-control' id='name_input'>";
$("#name").prepend(input);
});
$("#save").click(function(){
var data = $('#input').serializeArray();
console.log(JSON.stringify(data));
});
});

有了这个你可以解决朋友：

$(document).ready(function(){
$("#new_rule").click(function(){
var input = "<input type='text' name='name[]' placeholder='name' class='form-control' id='name_input'>";
$("#name").prepend(input);
});
$("#save").click(function(){
var names = [];
$('input[name^="name"]').each(function() {
names.push($(this).val());
});
console.log(JSON.stringify(names));
});
});

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