$(document).ready(function() { $('input[type="checkbox"]').click(function() { var arr =[]; $('input[type="checkbox"]:checked').each(function() { //arr.push($(this).parent('p').text()+'\n'); arr.push($(this).val()+'\n'); }); var array = arr.toString().split(',') $("#text").val(array.join("")); }); }); <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script> <p>Append value when checkbox is checked</p> <textarea rows="4" id="text" style="width: 100%"> </textarea> <div id="checkboxes"> <p><input type="checkbox" value="Item 1"><span>&nbsp;&nbsp; Item 1</span></p> <p><input type="checkbox" value="Item 2"><span>&nbsp;&nbsp; Item 2</span></p> <p><input type="checkbox" value="Item 3"><span>&nbsp;&nbsp; Item 3</span></p> <p><input type="checkbox" value="Item 4"><span>&nbsp;&nbsp; Item 4</span></p> <p><input type="checkbox" value="Item 5"><span>&nbsp;&nbsp; Item 5</span></p> </div>

这是一个老问题，但在2022年有一个更好的方法来实现它使用香草JS

我们不需要react或者花哨的框架。

我们只需要处理两个这样的onchange事件:

const types = [{id:1, name:'1'}, {id:2, name:'2'}, {id:3, name:'3'}, {id:4, name:'4'}, {id:5, name:'5'}, {id:6, name:'6'}] const all = document.getElementById('select-all') const summary = document.querySelector('p') let selected = new Set() const onCheck = event => { event.target.checked ? selected.add(event.target.value) : selected.delete(event.target.value) summary.textContent = `[${[...selected].join(', ')} | size: ${selected.size}] types selected.` all.checked = selected.size === types.length } const createCBInput = t => { const ol = document.querySelector('ol') const li = document.createElement('li') const input = document.createElement('input') input.type = 'checkbox' input.id = t.id input.name = 'type' input.value = t.id input.checked = selected.has(t.id) input.onchange = onCheck const label = document.createElement('label') label.htmlFor = t.id label.textContent = t.name li.append(input, label) ol.appendChild(li) } const onSelectAll = event => { const checked = event.target.checked for (const t of types) { const cb = document.getElementById(t.id) cb.checked = checked ? true : selected.has(t.id) const event = new Event('change') cb.dispatchEvent(event) } } all.checked = selected.size === types.length all.onchange = onSelectAll for (const t of types) { createCBInput(t) } ol { list-style-type: none; padding-left: 0; } <ol> <li> <input type="checkbox" id="select-all"> <label for="select-all"><strong>Select all</strong></label> </li> </ol> <p></p>

你可以尝试这样做:

$('input[type="checkbox"]').change(function(){
       var checkedValue = $('input:checkbox:checked').map(function(){
                return this.value;
            }).get();         
            alert(checkedValue);   //display selected checkbox value     
 })

Here

$('input[type="checkbox"]').change(function() call when any checkbox checked or unchecked, after this
$('input:checkbox:checked').map(function()  looping on all checkbox,

使用注释if块，以防止添加值已经在数组中，如果你使用按钮点击或其他东西来运行插入

$('#myDiv').change(function() { var values = []; { $('#myDiv :checked').each(function() { //if(values.indexOf($(this).val()) === -1){ values.push($(this).val()); // } }); console.log(values); } }); <div id="myDiv"> <input type="checkbox" name="type" value="4" /> <input type="checkbox" name="type" value="3" /> <input type="checkbox" name="type" value="1" /> <input type="checkbox" name="type" value="5" /> </div> <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>

如果你想使用一个普通的JS，你可以像@zahid-ullah那样做，但要避免循环:

  var values = [].filter.call(document.getElementsByName('fruits[]'), function(c) {
    return c.checked;
  }).map(function(c) {
    return c.value;
  });

ES6中的相同代码看起来更好:

var values = [].filter.call(document.getElementsByName('fruits[]'), (c) => c.checked).map(c => c.value);

window.serialize = function serialize() { var values = [].filter.call(document.getElementsByName('fruits[]'), function(c) { return c.checked; }).map(function(c) { return c.value; }); document.getElementById('serialized').innerText = JSON.stringify(values); } label { display: block; } <label> <input type="checkbox" name="fruits[]" value="banana">Banana </label> <label> <input type="checkbox" name="fruits[]" value="apple">Apple </label> <label> <input type="checkbox" name="fruits[]" value="peach">Peach </label> <label> <input type="checkbox" name="fruits[]" value="orange">Orange </label> <label> <input type="checkbox" name="fruits[]" value="strawberry">Strawberry </label> <button onclick="serialize()">Serialize </button> <div id="serialized"> </div>

var array = []
    $("input:checkbox[name=type]:checked").each(function(){
        array.push($(this).val());
    });