我的问题here的完整工作JSFiddle。
我的表单有多个子表单:
<div class="container-fluid">
<form>
<ul style="list-style-type: none">
<li class="panel panel-body panel-default">
<div class="form-group">
<label clas="control-label" for="1_sample">Sample</label>
<input type="number" id="1_sample" name="1_sample" class="form-control">
</div>
<div class="progress">
<div class="progress-bar progress-bar-striped active" role="progressbar" aria-valuenow="100" aria-valuemin="0" aria-valuemax="100" style="width: 100%">
<span class="sr-only">100% Complete</span>
</div>
</div>
<div class="form-group">
<label clas="control-label" for="1_result">Result</label>
<input type="number" id="1_result" name="1_result" class="form-control">
</div>
<div class="form-group">
<label clas="control-label" for="1_number">Number</label>
<input type="number" id="1_number" name="1_number" class="form-control">
</div>
</li>
<li class="panel panel-body panel-default">
<div class="form-group">
<label clas="control-label" for="2_sample">Sample</label>
<input type="number" id="2_sample" name="2_sample" class="form-control">
</div>
<div class="progress">
<div class="progress-bar progress-bar-striped active" role="progressbar" aria-valuenow="100" aria-valuemin="0" aria-valuemax="100" style="width: 100%">
<span class="sr-only">100% Complete</span>
</div>
</div>
<div class="form-group">
<label clas="control-label" for="2_result">Result</label>
<input type="number" id="2_result" name="2_result" class="form-control">
</div>
<div class="form-group">
<label clas="control-label" for="2_number">Number</label>
<input type="number" id="2_number" name="2_number" class="form-control">
</div>
</li>
</ul>
</form>
</div>
编码行为是当sample
输入发生变化时,同一result
中的number
和li
输入会一起变化。
我的JQuery目前看起来像:
$(document).ready(function() {
var form = $('form');
form.on('change', 'input[id$="sample"]', function (e) {
var sample_field = e.target;
var result_field = $(sample_field).closest('.form-group').next().next().find("input[id$='result']");
var number_field = $(sample_field).closest('.form-group').next().next().next().find("input[id$='number']");
var sample = $(sample_field).val();
$(result_field).val(sample);
$(number_field).val(sample);
});
});
我想知道是否有办法避免next()
链接以获得正确的表单组?在实际代码中,next()
链非常长,并且对于元素的追加或删除也不是很强大。
find()
本身似乎没有探索输入的.form-group
元素 - 是否有更好的方法来编写此功能?
更新
JSFiddle代码已更新,以反映已接受的答案here。
答案 0 :(得分:2)
如果要保持表单输入结构相同,则表示ID的命名结构遵循特定模式:
1_sample, 1_result, 1_number
2_sample, 2_result, 2_number
3_sample, 3_result, 3_number
...
然后有一个更优雅的解决方案,您可以直接定位输入字段的ID。请考虑对您的代码进行以下更新:
$(document).ready(function() {
var form = $('form');
form.on('change', 'input[id$="sample"]', function (e) {
//Get number prepended to id
var formGroupIdx = $(this).attr('id').split("_")[0];
//Get specific inputs using a concatenation of the prepended
//index and the default description of the input
var result_field = $('#'+formGroupIdx+'_'+'result');
var number_field = $('#'+formGroupIdx+'_'+'number');
var value = $(this).val();
result_field.val(value);
number_field.val(value);
});
});
对于以“sample”结尾的给定输入,它将首先获取该假装数字(1,2,3 ...)。然后它将使用该索引值直接获得相应的结果和数字输入。最后,它将值设置为等于当前样本输入。
更新了 jsfiddle
答案 1 :(得分:1)
您可以使用 $('form')选择元素.find()如下所示,以避免next()链接
$(document).ready(function() {
var form = $('form');
form.on('change', 'input[id$="sample"]', function (e) {
var sample_field = e.target;
var result_field = $('form').find("div.form-group > input[id$='result']");
var number_field = $('form').find("div.form-group > input[id$='number']");
var sample = $(sample_field).val();
$(result_field).val(sample);
$(number_field).val(sample);
});
});
<link href="https://netdna.bootstrapcdn.com/bootstrap/3.1.1/css/bootstrap.min.css" rel="stylesheet"/>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="container-fluid">
<form>
<ul style="list-style-type: none">
<li class="panel panel-body panel-default">
<div class="form-group">
<label clas="control-label" for="1_sample">Sample</label>
<input type="number" id="1_sample" name="1_sample" class="form-control">
</div>
<div class="progress">
<div class="progress-bar progress-bar-striped active" role="progressbar" aria-valuenow="100" aria-valuemin="0" aria-valuemax="100" style="width: 100%">
<span class="sr-only">100% Complete</span>
</div>
</div>
<div class="form-group">
<label clas="control-label" for="1_result">Result</label>
<input type="number" id="1_result" name="1_result" class="form-control">
</div>
<div class="form-group">
<label clas="control-label" for="1_number">Number</label>
<input type="number" id="1_number" name="1_number" class="form-control">
</div>
</li>
</ul>
</form>
</div>
这是jsfiddle:https://jsfiddle.net/v5mhu02n/3/