如何将表单的所有元素转换为JavaScript对象?
我希望有某种方法从表单自动构建JavaScript对象,而不必遍历每个元素。我不希望使用$('#formid').serialize();返回的字符串;,我也不希望$('#formid').serializeArray()返回映射;
如何将表单的所有元素转换为JavaScript对象?
我希望有某种方法从表单自动构建JavaScript对象,而不必遍历每个元素。我不希望使用$('#formid').serialize();返回的字符串;,我也不希望$('#formid').serializeArray()返回映射;
当前回答
此函数应处理多维数组以及多个同名元素。
到目前为止,我已经使用了几年:
jQuery.fn.serializeJSON=function() {
var json = {};
jQuery.map(jQuery(this).serializeArray(), function(n, i) {
var _ = n.name.indexOf('[');
if (_ > -1) {
var o = json;
_name = n.name.replace(/\]/gi, '').split('[');
for (var i=0, len=_name.length; i<len; i++) {
if (i == len-1) {
if (o[_name[i]]) {
if (typeof o[_name[i]] == 'string') {
o[_name[i]] = [o[_name[i]]];
}
o[_name[i]].push(n.value);
}
else o[_name[i]] = n.value || '';
}
else o = o[_name[i]] = o[_name[i]] || {};
}
}
else {
if (json[n.name] !== undefined) {
if (!json[n.name].push) {
json[n.name] = [json[n.name]];
}
json[n.name].push(n.value || '');
}
else json[n.name] = n.value || '';
}
});
return json;
};
其他回答
将任何东西变成对象(未经单元测试)
<script type="text/javascript">
string = {};
string.repeat = function(string, count)
{
return new Array(count+1).join(string);
}
string.count = function(string)
{
var count = 0;
for (var i=1; i<arguments.length; i++)
{
var results = string.match(new RegExp(arguments[i], 'g'));
count += results ? results.length : 0;
}
return count;
}
array = {};
array.merge = function(arr1, arr2)
{
for (var i in arr2)
{
if (arr1[i] && typeof arr1[i] == 'object' && typeof arr2[i] == 'object')
arr1[i] = array.merge(arr1[i], arr2[i]);
else
arr1[i] = arr2[i]
}
return arr1;
}
array.print = function(obj)
{
var arr = [];
$.each(obj, function(key, val) {
var next = key + ": ";
next += $.isPlainObject(val) ? array.print(val) : val;
arr.push( next );
});
return "{ " + arr.join(", ") + " }";
}
node = {};
node.objectify = function(node, params)
{
if (!params)
params = {};
if (!params.selector)
params.selector = "*";
if (!params.key)
params.key = "name";
if (!params.value)
params.value = "value";
var o = {};
var indexes = {};
$(node).find(params.selector+"["+params.key+"]").each(function()
{
var name = $(this).attr(params.key),
value = $(this).attr(params.value);
var obj = $.parseJSON("{"+name.replace(/([^\[]*)/, function()
{
return '"'+arguments[1]+'"';
}).replace(/\[(.*?)\]/gi, function()
{
if (arguments[1].length == 0)
{
var index = arguments[3].substring(0, arguments[2]);
indexes[index] = indexes[index] !== undefined ? indexes[index]+1 : 0;
return ':{"'+indexes[index]+'"';
}
else
return ':{"'+escape(arguments[1])+'"';
})+':"'+value.replace(/[\\"]/gi, function()
{
return "\\"+arguments[0];
})+'"'+string.repeat('}', string.count(name, ']'))+"}");
o = array.merge(o, obj);
});
return o;
}
</script>
测试输出:
$(document).ready(function()
{
console.log(array.print(node.objectify($("form"), {})));
console.log(array.print(node.objectify($("form"), {selector: "select"})));
});
on
<form>
<input name='input[a]' type='text' value='text'/>
<select name='input[b]'>
<option>select</option>
</select>
<input name='otherinput[c][a]' value='a'/>
<input name='otherinput[c][]' value='b'/>
<input name='otherinput[d][b]' value='c'/>
<input name='otherinput[c][]' value='d'/>
<input type='hidden' name='anotherinput' value='hidden'/>
<input type='hidden' name='anotherinput' value='1'/>
<input type='submit' value='submit'/>
</form>
将产生:
{ input: { a: text, b: select }, otherinput: { c: { a: a, 0: b, 1: d }, d: { b: c } }, anotherinput: 1 }
{ input: { b: select } }
我的库phery中的代码有一个序列化例程,可以处理非常复杂的表单(如演示中所示https://github.com/pocesar/phery/blob/master/demo.php#L1664),而且不是一刀切。它实际上检查每个字段的类型。例如,单选框与范围不同,与keygen不同,与select multiple不同。我的功能涵盖了这一切,你可以看到它在https://github.com/pocesar/phery/blob/master/phery.js#L1851.
serializeForm:function (opt) {
opt = $.extend({}, opt);
if (typeof opt['disabled'] === 'undefined' || opt['disabled'] === null) {
opt['disabled'] = false;
}
if (typeof opt['all'] === 'undefined' || opt['all'] === null) {
opt['all'] = false;
}
if (typeof opt['empty'] === 'undefined' || opt['empty'] === null) {
opt['empty'] = true;
}
var
$form = $(this),
result = {},
formValues =
$form
.find('input,textarea,select,keygen')
.filter(function () {
var ret = true;
if (!opt['disabled']) {
ret = !this.disabled;
}
return ret && $.trim(this.name);
})
.map(function () {
var
$this = $(this),
radios,
options,
value = null;
if ($this.is('[type="radio"]') || $this.is('[type="checkbox"]')) {
if ($this.is('[type="radio"]')) {
radios = $form.find('[type="radio"][name="' + this.name + '"]');
if (radios.filter('[checked]').size()) {
value = radios.filter('[checked]').val();
}
} else if ($this.prop('checked')) {
value = $this.is('[value]') ? $this.val() : 1;
}
} else if ($this.is('select')) {
options = $this.find('option').filter(':selected');
if ($this.prop('multiple')) {
value = options.map(function () {
return this.value || this.innerHTML;
}).get();
} else {
value = options.val();
}
} else {
value = $this.val();
}
return {
'name':this.name || null,
'value':value
};
}).get();
if (formValues) {
var
i,
value,
name,
$matches,
len,
offset,
j,
fields;
for (i = 0; i < formValues.length; i++) {
name = formValues[i].name;
value = formValues[i].value;
if (!opt['all']) {
if (value === null) {
continue;
}
} else {
if (value === null) {
value = '';
}
}
if (value === '' && !opt['empty']) {
continue;
}
if (!name) {
continue;
}
$matches = name.split(/\[/);
len = $matches.length;
for (j = 1; j < len; j++) {
$matches[j] = $matches[j].replace(/\]/g, '');
}
fields = [];
for (j = 0; j < len; j++) {
if ($matches[j] || j < len - 1) {
fields.push($matches[j].replace("'", ''));
}
}
if ($matches[len - 1] === '') {
offset = assign_object(result, fields, [], true, false, false);
if (value.constructor === Array) {
offset[0][offset[1]].concat(value);
} else {
offset[0][offset[1]].push(value);
}
} else {
assign_object(result, fields, value);
}
}
}
return result;
}
它是我的库phery的一部分,但可以移植到您自己的项目中。它在应该有数组的地方创建数组,从select、normalize复选框等选项中获取正确的选择选项。如果要将其转换为JSON(真正的JSON字符串),只需执行JSON.stringify($('form').serializeForm());
此函数应处理多维数组以及多个同名元素。
到目前为止,我已经使用了几年:
jQuery.fn.serializeJSON=function() {
var json = {};
jQuery.map(jQuery(this).serializeArray(), function(n, i) {
var _ = n.name.indexOf('[');
if (_ > -1) {
var o = json;
_name = n.name.replace(/\]/gi, '').split('[');
for (var i=0, len=_name.length; i<len; i++) {
if (i == len-1) {
if (o[_name[i]]) {
if (typeof o[_name[i]] == 'string') {
o[_name[i]] = [o[_name[i]]];
}
o[_name[i]].push(n.value);
}
else o[_name[i]] = n.value || '';
}
else o = o[_name[i]] = o[_name[i]] || {};
}
}
else {
if (json[n.name] !== undefined) {
if (!json[n.name].push) {
json[n.name] = [json[n.name]];
}
json[n.name].push(n.value || '');
}
else json[n.name] = n.value || '';
}
});
return json;
};
此代码转换并保存输入类型,而不是全部转换为字符串:
jQuery.fn.serializeForm = function () {
var form = this.get(0);
var i = [];
var ret = {};
for (i = form.elements.length - 1; i >= 0; i = i - 1) {
if (form.elements[i].name === "") {
continue;
}
var name = form.elements[i].name;
switch (form.elements[i].nodeName) {
case 'INPUT':
switch (form.elements[i].type) {
case 'text':
case 'tel':
case 'email':
case 'hidden':
case 'password':
ret[name] = encodeURIComponent(form.elements[i].value);
break;
case 'checkbox':
case 'radio':
ret[name] = form.elements[i].checked;
break;
case 'number':
ret[name] = parseFloat(form.elements[i].value);
break;
}
break;
case 'SELECT':
case 'TEXTAREA':
ret[name] = encodeURIComponent(form.elements[i].value);
break;
}
}
return ret;
};
例如,这是输出:
Day: 13
Key: ""
Month: 5
OnlyPayed: true
SearchMode: "0"
Year: 2021
而不是
Day: "13"
Key: ""
Month: "5"
OnlyPayed: "true"
SearchMode: "0"
Year: "2021"
另一个答案
document.addEventListener(“DOMContentLoaded”,函数(){setInterval(函数){var form=document.getElementById('form')||document.querySelector('form[name=“userprofile”]');var json=Array.from(new FormData(form)).map(函数(e,i){this[e[0]〕=e[1];return this;}.bind({}))[0];console.log(json)document.querySelector('#asJSON').value=JSON.stringify(JSON);}, 1000);})<form name=“userprofile”id=“form”><p>名称<input-type=“text”Name=“firstname”value=“John”/></p><p>姓氏<input name=“lastname”value=“Smith”/></p><p>工作<input name=“employment[name]”value=“inc,inc.”/></p><p>工作时间:<input name=“employment[since]”value=“2017”/></p><p>照片<input-type=“file”/></p><p>发送<input-type=“submit”/></p></form>JSON:<textarea id=“asJSON”></textarea>
表单数据:https://developer.mozilla.org/en-US/docs/Web/API/FormData