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

所以我使用了公认的答案,发现了一个主要缺陷。它不支持以下输入数组:

<input type="checkbox" name="array[]" value="1"/>
<input type="checkbox" name="array[]" value="2"/>
<input type="checkbox" name="array[]" value="3"/>

这一小改动应该可以解决以下问题:

function objectifyForm(inp){
    var rObject = {};
    for (var i = 0; i < inp.length; i++){
        if(inp[i]['name'].substr(inp[i]['name'].length - 2) == "[]"){
            var tmp = inp[i]['name'].substr(0, inp[i]['name'].length-2);
            if(Array.isArray(rObject[tmp])){
                rObject[tmp].push(inp[i]['value']);
            } else{
                rObject[tmp] = [];
                rObject[tmp].push(inp[i]['value']);
            }
        } else{
            rObject[inp[i]['name']] = inp[i]['value'];
        }
    }
    return rObject;
}

记住将$(this).serializeArray()的输出传递给它;否则它不会起作用。

其他回答

这将处理具有相同名称的多个select或偶数元素:

$.fn.formToJSON = function(){
    pairStr=this.serialize();
    let rObj={};
    pairStr.split(`&`).forEach((vp)=> {
        prop=vp.split(`=`)[0];
        val=vp.split(`=`)[1];
        if(rObj.hasOwnProperty(prop)) {
            if (Array.isArray(rObj[prop])) {
                rObj[prop].push(val);
            } else {
                rObj[prop]=[rObj[prop]];
                rObj[prop].push(val);
            }
        } else {
            rObj[prop]=val;
        }
    });
    return JSON.stringify(rObj);
}

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);

此函数返回转换为正确类型的所有值;

bool/string/(integer/floats)可能

虽然您需要jQuery来实现这一点,但由于serializeArray也是jQuery,所以没什么大不了的。

/**
 * serialized a form to a json object
 *
 * @usage: $("#myform").jsonSerialize();
 *
 */

(function($) {
    "use strict";
    $.fn.jsonSerialize = function() {
        var json = {};
        var array = $(this).serializeArray();
        $.each(array, function(key, obj) {
            var value = (obj.value == "") ? false : obj.value;
            if(value) {
                // check if we have a number
                var isNum = /^\d+$/.test(value);
                if(isNum) value = parseFloat(value);
                // check if we have a boolean
                var isBool = /^(false|true)+$/.test(value);
                if(isBool) value = (value!=="false");
            }
            json[obj.name] = value;
        });
        return json;
    }
})(jQuery);

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 } }

我编写了一个jQuery模块jsForm,即使对于非常复杂的表单(也允许集合和其他更复杂的结构),它也可以实现这种双向。

它使用字段的名称(加上一些用于集合的特殊类)并匹配JSON对象。它允许自动复制用于收集和数据处理的DOM元素:

<html>
    <head>
        <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
        <script src="https://raw.github.com/corinis/jsForm/master/src/jquery.jsForm.js"></script>
        <script>
        $(function(){
            // Some JSON data
            var jsonData = {
                name: "TestName",   // Standard inputs
                description: "long Description\nMultiline", // Textarea
                links: [{href:'http://stackoverflow.com',description:'StackOverflow'}, {href:'http://www.github.com', description:'GitHub'}],   // Lists
                active: true,   // Checkbox
                state: "VISIBLE"    // Selects (enums)
            };

            // Initialize the form, prefix is optional and defaults to data
            $("#details").jsForm({
                data:jsonData
            });

            $("#show").click(function() {
                // Show the JSON data
                alert(JSON.stringify($("#details").jsForm("get"), null, " "));
            });
        });
        </script>
    </head>
    <body>
        <h1>Simpel Form Test</h1>
        <div id="details">
            Name: <input name="data.name"/><br/>
            <input type="checkbox" name="data.active"/> active<br/>
            <textarea name="data.description"></textarea><br/>
            <select name="data.state">
                <option value="VISIBLE">visible</option>
                <option value="IMPORTANT">important</option>
                <option value="HIDDEN">hidden</option>
            </select>
            <fieldset>
                <legend>Links</legend>
                <ul class="collection" data-field="data.links">
                    <li><span class="field">links.description</span> Link: <input name="links.href"/> <button class="delete">x</button></li>
                </ul>
            </fieldset>
            <button class="add" data-field="data.links">add a link</button><br/>
            Additional field: <input name="data.addedField"/>
        </div>
        <button id="show">Show Object</button>
    </body>
</html>