多年后的香草ajs (es6)

let body = new FormData()

body.set('key1', 'value AA')

body.set('key2', 'value BB')

let data = [...body.keys()].reduce( (acc, key, idx) => {
    acc[key] = body.get(key)
    return acc
} , {} )

console.log(JSON.stringify(data)) // {key1: 'value AA', key2: 'value BB'}

如果你想要json字符串:

var jsonStr =  JSON.stringify($('#formId').serializeObject());

如果你想要一个json对象

var jsonObj =  JSON.parse(JSON.stringify($('#formId').serializeObject()));

我在这里迟到了。但是，我做了一个简单的方法来检查输入type="checkbox"

var formData = new FormData($form.get(0));
        var objectData = {};
        formData.forEach(function (value, key) {
            var updatedValue = value;
            if ($('input[name="' + key + '"]').attr("type") === "checkbox" && $('input[name="' + key + '"]').is(":checked")) {
                updatedValue = true; // we don't set false due to it is by default on HTML
            }
            objectData[key] = updatedValue;
        });
var jsonData = JSON.stringify(objectData);

我希望这能帮助到其他人。

如果需要支持序列化嵌套字段(类似于PHP处理表单字段的方式)，可以使用以下函数

function update(data, keys, value) { if (keys.length === 0) { // Leaf node return value; } let key = keys.shift(); if (!key) { data = data || []; if (Array.isArray(data)) { key = data.length; } } // Try converting key to a numeric value let index = +key; if (!isNaN(index)) { // We have a numeric index, make data a numeric array // This will not work if this is a associative array // with numeric keys data = data || []; key = index; } // If none of the above matched, we have an associative array data = data || {}; let val = update(data[key], keys, value); data[key] = val; return data; } function serializeForm(form) { return Array.from((new FormData(form)).entries()) .reduce((data, [field, value]) => { let [_, prefix, keys] = field.match(/^([^\[]+)((?:\[[^\]]*\])*)/); if (keys) { keys = Array.from(keys.matchAll(/\[([^\]]*)\]/g), m => m[1]); value = update(data[prefix], keys, value); } data[prefix] = value; return data; }, {}); } document.getElementById('output').textContent = JSON.stringify(serializeForm(document.getElementById('form')), null, 2); <form id="form"> <input name="field1" value="Field 1"> <input name="field2[]" value="Field 21"> <input name="field2[]" value="Field 22"> <input name="field3[a]" value="Field 3a"> <input name="field3[b]" value="Field 3b"> <input name="field3[c]" value="Field 3c"> <input name="field4[x][a]" value="Field xa"> <input name="field4[x][b]" value="Field xb"> <input name="field4[x][c]" value="Field xc"> <input name="field4[y][a]" value="Field ya"> <input name="field5[z][0]" value="Field z0"> <input name="field5[z][]" value="Field z1"> <input name="field6.z" value="Field 6Z0"> <input name="field6.z" value="Field 6Z1"> </form> <h2>Output</h2> <pre id="output"> </pre>

另一种适用于选择多个或具有相同name属性的输入的方法:

function form_to_json() { const form_data = new FormData(document.querySelector('form')) const uniqueKeys = [...new Set(form_data.keys())] const obj = {} uniqueKeys.forEach((value, key) => { obj[value] = (form_data.getAll(value).length > 1) ? form_data.getAll(value) : form_data.get(value) }) const json = JSON.stringify(obj) alert(json) } <form> <input type="text" name="name" value="Cesar"></br> <select name="cars" id="cars" multiple> <option value="volvo" selected>Volvo</option> <option value="saab" selected>Saab</option> </select> <input type="button" onclick="form_to_json()" value="Ok"> </form>

使用JSON.stringify()中描述的toJSON

如果值具有toJSON()方法，则它负责定义将序列化的数据。

这里有一个小技巧。

var fd = new FormData(document.forms[0]); fd.toJSON = function() { const o = {}; this.forEach((v, k) => { v = this.getAll(k); o[k] = v.length == 1 ? v[0] : (v.length >= 1 ? v : null); }); return o; }; document.write(`<pre>${JSON.stringify(fd)}</pre>`) <form action="#"> <input name="name" value="Robinson" /> <input name="items" value="Vin" /> <input name="items" value="Fromage" /> <select name="animals" multiple id="animals"> <option value="tiger" selected>Tigre</option> <option value="turtle" selected>Tortue</option> <option value="monkey">Singe</option> </select> </form>