是否有一种简单的单行方式来获取表单的数据，就像以经典的仅html方式提交表单一样?
例如:
<form>
<input type="radio" name="foo" value="1" checked="checked" />
<input type="radio" name="foo" value="0" />
<input name="bar" value="xxx" />
<select name="this">
<option value="hi" selected="selected">Hi</option>
<option value="ho">Ho</option>
</form>
输出:
{
"foo": "1",
"bar": "xxx",
"this": "hi"
}
像这样的东西太简单了，因为它没有(正确地)包括文本区域，选择，单选按钮和复选框:
$("#form input").each(function () {
data[theFieldName] = theFieldValue;
});
这里是一个工作的JavaScript实现，它正确地处理复选框、单选按钮和滑块(也可能是其他输入类型，但我只测试了这些)。
function setOrPush(target, val) {
var result = val;
if (target) {
result = [target];
result.push(val);
}
return result;
}
function getFormResults(formElement) {
var formElements = formElement.elements;
var formParams = {};
var i = 0;
var elem = null;
for (i = 0; i < formElements.length; i += 1) {
elem = formElements[i];
switch (elem.type) {
case 'submit':
break;
case 'radio':
if (elem.checked) {
formParams[elem.name] = elem.value;
}
break;
case 'checkbox':
if (elem.checked) {
formParams[elem.name] = setOrPush(formParams[elem.name], elem.value);
}
break;
default:
formParams[elem.name] = setOrPush(formParams[elem.name], elem.value);
}
}
return formParams;
}
工作的例子:
function setOrPush(target, val) {
var result = val;
if (target) {
result = [target];
result.push(val);
}
return result;
}
function getFormResults(formElement) {
var formElements = formElement.elements;
var formParams = {};
var i = 0;
var elem = null;
for (i = 0; i < formElements.length; i += 1) {
elem = formElements[i];
switch (elem.type) {
case 'submit':
break;
case 'radio':
if (elem.checked) {
formParams[elem.name] = elem.value;
}
break;
case 'checkbox':
if (elem.checked) {
formParams[elem.name] = setOrPush(formParams[elem.name], elem.value);
}
break;
default:
formParams[elem.name] = setOrPush(formParams[elem.name], elem.value);
}
}
return formParams;
}
//
// Boilerplate for running the snippet/form
//
function ok() {
var params = getFormResults(document.getElementById('main_form'));
document.getElementById('results_wrapper').innerHTML = JSON.stringify(params, null, ' ');
}
(function() {
var main_form = document.getElementById('main_form');
main_form.addEventListener('submit', function(event) {
event.preventDefault();
ok();
}, false);
})();
<form id="main_form">
<div id="questions_wrapper">
<p>what is a?</p>
<div>
<input type="radio" required="" name="q_0" value="a" id="a_0">
<label for="a_0">a</label>
<input type="radio" required="" name="q_0" value="b" id="a_1">
<label for="a_1">b</label>
<input type="radio" required="" name="q_0" value="c" id="a_2">
<label for="a_2">c</label>
<input type="radio" required="" name="q_0" value="d" id="a_3">
<label for="a_3">d</label>
</div>
<div class="question range">
<label for="a_13">A?</label>
<input type="range" required="" name="q_3" id="a_13" min="0" max="10" step="1" list="q_3_dl">
<datalist id="q_3_dl">
<option value="0"></option>
<option value="1"></option>
<option value="2"></option>
<option value="3"></option>
<option value="4"></option>
<option value="5"></option>
<option value="6"></option>
<option value="7"></option>
<option value="8"></option>
<option value="9"></option>
<option value="10"></option>
</datalist>
</div>
<p>A and/or B?</p>
<div>
<input type="checkbox" name="q_4" value="A" id="a_14">
<label for="a_14">A</label>
<input type="checkbox" name="q_4" value="B" id="a_15">
<label for="a_15">B</label>
</div>
</div>
<button id="btn" type="submit">OK</button>
</form>
<div id="results_wrapper"></div>
编辑:
如果您正在寻找一个更完整的实现，那么请查看我为其制作的项目的这一部分。我最终会用我想出的完整解决方案来更新这个问题，但也许这对某人会有帮助。
我编写了一个库来解决这个问题:JSONForms。它采用一个表单，遍历每个输入并构建一个易于阅读的JSON对象。
假设你有以下表单:
<form enctype='application/json'>
<input name='places[0][city]' value='New York City'>
<input type='number' name='places[0][population]' value='8175133'>
<input name='places[1][city]' value='Los Angeles'>
<input type='number' name='places[1][population]' value='3792621'>
<input name='places[2][city]' value='Chicago'>
<input type='number' name='places[2][population]' value='2695598'>
</form>
将表单传递给JSONForms的encode方法将返回以下对象:
{
"places": [
{
"city": "New York City",
"population": 8175133
},
{
"city": "Los Angeles",
"population": 3792621
},
{
"city": "Chicago",
"population": 2695598
}
]
}
下面是表单的演示。
