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
这会把一切都考虑在内
函数formToObject(表单){let data=新FormData(表单);let queryString=新URLSearchParams(data).toString();var obj={};var params=queryString.split(“&”);对于(var i=0;i<params.length;i++){var param=params[i].split(“=”);var key=param[0].replace(“[]”,“”);var key=密钥.替换(“%5B%5 D”,“”);var值=参数[1];if(obj[key]==未定义){obj[key]=值;}else if(数组的obj[key]实例){obj[key].push(值);}其他{obj[key]=[obj[key],值];}}控制台日志(obj)返回obj;}<!DOCTYPE html><html><head><title>表单示例</title></head><body style=“height:800px;溢出:滚动”><form id=“test”onchange=“formToObject(this)”><div><h3>水果</h3><input type=“checkbox”name=“fruit”value=“apple”id=“apple“><label for=“apple”>Apfel</label><input-type=“checkbox”name=“fruit”value=“banana”id=“banana“><label for=“banana”>Banane</label><input type=“checkbox”name=“fruit”value=“cherry”id=“cherr”><label for=“cherry”>Kirsche</label><input type=“checkbox”name=“fruit”value=“葡萄”id=“葡萄”><label for=“葡萄”>Traube</label><input type=“checkbox”name=“fruit”value=“pear”id=“pear“><label for=“pear”>Birne</label></div><div><h3>多个选项</h3><select multiple name=“manyOptions[]”><option value=“选项1”>选项1</option><option value=“option 2”>选项2</option><option value=“选项3”>选项3</option></选择></div><div><h3>检查选项</h3><input type=“radio”name=“onceOption”value=“Option 1”>选项1<br><input type=“radio”name=“onceOption”value=“Option 2”>选项2<br><input type=“radio”name=“onceOption”value=“Option 3”>选项3<br></div></form></body></html>
其他回答
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"
serialize函数将JSON对象作为参数并返回serialize String。
function serialize(object) {
var _SPECIAL_CHARS = /[\\\"\x00-\x1f\x7f-\x9f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g, _CHARS = {
'\b' : '\\b',
'\t' : '\\t',
'\n' : '\\n',
'\f' : '\\f',
'\r' : '\\r',
'"' : '\\"',
'\\' : '\\\\'
}, EMPTY = '', OPEN_O = '{', CLOSE_O = '}', OPEN_A = '[', CLOSE_A = ']', COMMA = ',', COMMA_CR = ",\n", CR = "\n", COLON = ':', space = "", COLON_SP = ': ', stack = [], QUOTE = '"';
function _char(c) {
if (!_CHARS[c]) {
_CHARS[c] = '\\u' + ('0000' + (+(c.charCodeAt(0))).toString(16))
.slice(-4);
}
return _CHARS[c];
}
function _string(s) {
return QUOTE + s.replace(_SPECIAL_CHARS, _char) + QUOTE;
// return str.replace('\"','').replace('\"','');
}
function serialize(h, key) {
var value = h[key], a = [], colon = ":", arr, i, keys, t, k, v;
arr = value instanceof Array;
stack.push(value);
keys = value;
i = 0;
t = typeof value;
switch (t) {
case "object" :
if(value==null){
return null;
}
break;
case "string" :
return _string(value);
case "number" :
return isFinite(value) ? value + EMPTY : NULL;
case "boolean" :
return value + EMPTY;
case "null" :
return null;
default :
return undefined;
}
arr = value.length === undefined ? false : true;
if (arr) { // Array
for (i = value.length - 1; i >= 0; --i) {
a[i] = serialize(value, i) || NULL;
}
}
else { // Object
i = 0;
for (k in keys) {
if (keys.hasOwnProperty(k)) {
v = serialize(value, k);
if (v) {
a[i++] = _string(k) + colon + v;
}
}
}
}
stack.pop();
if (space && a.length) {
return arr
? "[" + _indent(a.join(COMMA_CR), space) + "\n]"
: "{\n" + _indent(a.join(COMMA_CR), space) + "\n}";
}
else {
return arr ? "[" + a.join(COMMA) + "]" : "{" + a.join(COMMA)
+ "}";
}
}
return serialize({
"" : object
}, "");
}
此线程似乎已成为表单序列化的常见问题解答:)
我对PHP命名的看法:<input name=“user[name]”>
$('form').on('submit', function(ev) {
ev.preventDefault();
var obj = $(this).serializePHPObject();
// $.post('./', obj);
});
(function ($) {
// based on https://stackoverflow.com/a/25239999/1644202
// <input name="user[name]" >
$.fn.serializePHPObject = function () {
var obj = {};
$.each(this.serializeArray(), function (i, pair) {
var cObj = obj,
pObj,
cpName;
$.each(pair.name.split("["), function (i, pName) {
pName = pName.replace("]", "");
pObj = cObj;
cpName = pName;
cObj = cObj[pName] ? cObj[pName] : (cObj[pName] = {});
});
pObj[cpName] = pair.value;
});
return obj;
};
})(jQuery);
这里有一种非jQuery方法:
var getFormData = function(form) {
//Ignore the submit button
var elements = Array.prototype.filter.call(form.elements, function(element) {
var type = element.getAttribute('type');
return !type || type.toLowerCase() !== 'submit';
});
您可以这样使用:
function() {
var getFormData = function(form) {
//Ignore the submit button
var elements = Array.prototype.filter.call(form.elements, function(element) {
var type = element.getAttribute('type');
return !type || type.toLowerCase() !== 'submit';
});
//Make an object out of the form data: {name: value}
var data = elements.reduce(function(data, element) {
data[element.name] = element.value;
return data;
}, {});
return data;
};
var post = function(action, data, callback) {
var request = new XMLHttpRequest();
request.onload = callback;
request.open('post', action);
request.setRequestHeader("Content-Type", "application/json;charset=UTF-8");
request.send(JSON.stringify(data), true);
request.send();
};
var submit = function(e) {
e.preventDefault();
var form = e.target;
var action = form.action;
var data = getFormData(form);
//change the third argument in order to do something
//more intersting with the response than just print it
post(action, data, console.log.bind(console));
}
//change formName below
document.formName.onsubmit = submit;
})();
我检查了所有其他答案是否存在问题,如果输入名称是数组,例如name[key],那么应该这样生成:
名称:{key:value}
例如:如果您的HTML表单与下面的表单类似:
<form>
<input name="name" value="value" >
<input name="name1[key1]" value="value1" >
<input name="name2[key2]" value="value2" >
<input name="name3[key3]" value="value3" >
</form>
但是它应该像下面的JSON一样生成,而不是像下面这样的对象和所有其他答案。因此,如果有人想带来类似以下JSON的内容,请尝试下面的JS代码。
{
name : 'value',
name1 : { key1 : 'value1' },
name2 : { key2 : 'value2' },
name3 : { key2 : 'value2' }
}
$.fn.getForm2obj=函数(){var_={};$.map(this.serializeArray(),函数(n){常量键=n.name.match(/[a-zA-Z0-9_]+|(?=\[\])/g);如果(按键长度>1){让tmp=_;pop=keys.pop();for(设i=0;i<keys.length,j=keys[i];i++){tmp[j]=(!tmp[j]?(pop=='')?[]:{}:tmp[j]),tmp=tmp[j];}如果(pop=='')tmp=(!Array.isArray(tmp)?[]:tmp)、tmp.push(n.value);否则tmp[pop]=n.value;}else_[keys.pop()]=n.value;});返回_;}console.log($('form').getForm2obj());$('form input').change(函数(){console.clear();console.log($('form').getForm2obj());});<script src=“https://code.jquery.com/jquery-3.2.1.min.js“></script><表单><input name=“name”value=“value”><input type=“checkbox”name=“name1[]”value=“1”checked=“checked”>1<input type=“checkbox”name=“name1[]”value=“2”>2<input-type=“checkbox”name=“name1[]”value=“3”>3<br><input-type=“radio”name=“gender”value=“male”checked=“checked”>男性<input-type=“radio”name=“gender”value=“female”>女性<input name=“name2[key1]”value=“value1”><input name=“一个[另一个][另一个]”value=“value4”><input name=“name3[1][name]”value=“value4”><input name=“name3[2][name]”value=“value4”><input name=“[]”value=“value5”></form>