这并不需要jQuery。这里是一个纯JS概念的证明，使用了一个事件监听器在复选框的父容器上(checkbox-group-required)，复选框元素的.checked属性和array# some。

const validate = el => { const checkboxes = el.querySelectorAll('input[type="checkbox"]'); return [...checkboxes].some(e => e.checked); }; const formEl = document.querySelector("form"); const statusEl = formEl.querySelector(".status-message"); const checkboxGroupEl = formEl.querySelector(".checkbox-group-required"); checkboxGroupEl.addEventListener("click", e => { statusEl.textContent = validate(checkboxGroupEl) ? "valid" : "invalid"; }); formEl.addEventListener("submit", e => { e.preventDefault(); if (validate(checkboxGroupEl)) { statusEl.textContent = "Form submitted!"; // Send data from e.target to your backend } else { statusEl.textContent = "Error: select at least one checkbox"; } }); <form> <div class="checkbox-group-required"> <input type="checkbox"> <input type="checkbox"> <input type="checkbox"> <input type="checkbox"> </div> <input type="submit" /> <div class="status-message"></div> </form>

如果你有多个组要验证，在每个组上添加一个循环，可选地添加错误消息或CSS来指示哪个组验证失败:

const validate = el => { const checkboxes = el.querySelectorAll('input[type="checkbox"]'); return [...checkboxes].some(e => e.checked); }; const allValid = els => [...els].every(validate); const formEl = document.querySelector("form"); const statusEl = formEl.querySelector(".status-message"); const checkboxGroupEls = formEl.querySelectorAll(".checkbox-group-required"); checkboxGroupEls.forEach(el => el.addEventListener("click", e => { statusEl.textContent = allValid(checkboxGroupEls) ? "valid" : "invalid"; }) ); formEl.addEventListener("submit", e => { e.preventDefault(); if (allValid(checkboxGroupEls)) { statusEl.textContent = "Form submitted!"; } else { statusEl.textContent = "Error: select at least one checkbox from each group"; } }); <form> <div class="checkbox-group-required"> <label> Group 1: <input type="checkbox"> <input type="checkbox"> <input type="checkbox"> <input type="checkbox"> </label> </div> <div class="checkbox-group-required"> <label> Group 2: <input type="checkbox"> <input type="checkbox"> <input type="checkbox"> <input type="checkbox"> </label> </div> <input type="submit" /> <div class="status-message"></div> </form>

受到@thegauraw和@Brian Woodward的启发，我为JQuery用户收集了一些答案，其中包括一条自定义验证错误消息:

$cbx_group = $("input:checkbox[name^='group']");
$cbx_group.on("click", function () {
  if ($cbx_group.is(":checked")) {
    // checkboxes become unrequired as long as one is checked
    $cbx_group.prop("required", false).each(function () {
      this.setCustomValidity("");
    });
  } else {
    // require checkboxes and set custom validation error message
    $cbx_group.prop("required", true).each(function () {
      this.setCustomValidity("Please select at least one checkbox.");
    });
  }
});

注意，我的表单默认选中了一些复选框。

也许你们中的一些JavaScript/JQuery向导可以更严格地使用它?

我们也可以用html5轻松做到这一点，只需要添加一些jquery代码

Demo

HTML

<form>
 <div class="form-group options">
   <input type="checkbox" name="type[]" value="A" required /> A
   <input type="checkbox" name="type[]" value="B" required /> B
   <input type="checkbox" name="type[]" value="C" required /> C
   <input type="submit">
 </div>
</form>

Jquery

$(function(){
    var requiredCheckboxes = $('.options :checkbox[required]');
    requiredCheckboxes.change(function(){
        if(requiredCheckboxes.is(':checked')) {
            requiredCheckboxes.removeAttr('required');
        } else {
            requiredCheckboxes.attr('required', 'required');
        }
    });
});

这并不需要jQuery。这里是一个纯JS概念的证明，使用了一个事件监听器在复选框的父容器上(checkbox-group-required)，复选框元素的.checked属性和array# some。

const validate = el => { const checkboxes = el.querySelectorAll('input[type="checkbox"]'); return [...checkboxes].some(e => e.checked); }; const formEl = document.querySelector("form"); const statusEl = formEl.querySelector(".status-message"); const checkboxGroupEl = formEl.querySelector(".checkbox-group-required"); checkboxGroupEl.addEventListener("click", e => { statusEl.textContent = validate(checkboxGroupEl) ? "valid" : "invalid"; }); formEl.addEventListener("submit", e => { e.preventDefault(); if (validate(checkboxGroupEl)) { statusEl.textContent = "Form submitted!"; // Send data from e.target to your backend } else { statusEl.textContent = "Error: select at least one checkbox"; } }); <form> <div class="checkbox-group-required"> <input type="checkbox"> <input type="checkbox"> <input type="checkbox"> <input type="checkbox"> </div> <input type="submit" /> <div class="status-message"></div> </form>

如果你有多个组要验证，在每个组上添加一个循环，可选地添加错误消息或CSS来指示哪个组验证失败:

const validate = el => { const checkboxes = el.querySelectorAll('input[type="checkbox"]'); return [...checkboxes].some(e => e.checked); }; const allValid = els => [...els].every(validate); const formEl = document.querySelector("form"); const statusEl = formEl.querySelector(".status-message"); const checkboxGroupEls = formEl.querySelectorAll(".checkbox-group-required"); checkboxGroupEls.forEach(el => el.addEventListener("click", e => { statusEl.textContent = allValid(checkboxGroupEls) ? "valid" : "invalid"; }) ); formEl.addEventListener("submit", e => { e.preventDefault(); if (allValid(checkboxGroupEls)) { statusEl.textContent = "Form submitted!"; } else { statusEl.textContent = "Error: select at least one checkbox from each group"; } }); <form> <div class="checkbox-group-required"> <label> Group 1: <input type="checkbox"> <input type="checkbox"> <input type="checkbox"> <input type="checkbox"> </label> </div> <div class="checkbox-group-required"> <label> Group 2: <input type="checkbox"> <input type="checkbox"> <input type="checkbox"> <input type="checkbox"> </label> </div> <input type="submit" /> <div class="status-message"></div> </form>

非常简单的方法来验证是否至少有一个复选框被选中:

function isAtLeastOneChecked(name) {
    let checkboxes = Array.from(document.getElementsByName(name));
    return checkboxes.some(e => e.checked);
}

然后，您可以实现想要显示错误的任何逻辑。

一个通用的解决方案，无需更改提交事件或知道复选框的名称

构建一个函数，将复选框标记为HTML5-Invalid 扩展Change-Event并在开始时检查有效性

jQuery.fn.getSiblingsCheckboxes = function () { let $this = $(this); let $parent = $this.closest('form, .your-checkbox-listwrapper'); return $parent.find('input[type="checkbox"][name="' + $this.attr('name')+'"]').filter('*[required], *[data-required]'); } jQuery.fn.checkRequiredInputs = function() { return this.each(function() { let $this = $(this); let $parent = $this.closest('form, .your-checkbox-list-wrapper'); let $allInputs = $this.getSiblingsCheckboxes(); if ($allInputs.filter(':checked').length > 0) { $allInputs.each(function() { // this.setCustomValidity(''); // not needed $(this).removeAttr('required'); $(this).closest('li').css('color', 'green'); // for debugging only }); } else { $allInputs.each(function() { // this.reportValidity(); // not needed $(this).attr('required', 'required'); $(this).closest('li').css('color', 'red'); // for debugging only }); } return true; }); }; $(document).ready(function() { $('input[type="checkbox"][required="required"], input[type="checkbox"][required]').not('*[data-required]').not('*[disabled]').each(function() { let $input = $(this); let $allInputs = $input.getSiblingsCheckboxes(); $input.attr('data-required', 'required'); $input.removeAttr('required'); $input.on('change', function(event) { $input.checkRequiredInputs(); }); }); $('input[type="checkbox"][data-required="required"]').checkRequiredInputs(); }); <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.0.0/jquery.min.js"></script> </head> <form> <ul> <li><input type="checkbox" id="checkbox1" name="countries" value="Argentina" required="required">Argentina</li> <li><input type="checkbox" id="checkbox2" name="countries" value="France" required="required">France</li> <li><input type="checkbox" id="checkbox3" name="countries" value="Germany" required="required">Germany</li> <li><input type="checkbox" id="checkbox4" name="countries" value="Japan" required="required">Japan</li> <li><input type="checkbox" id="checkbox5" name="countries" value="Australia" required="required">Australia</li> </ul> <input type="submit" value="Submit"> </form>