如何使用 Javascript 启用禁用多个 DOM 元素

Question

我正在尝试使用 DOM 操作启用许多单选按钮，以避免每次单击所有按钮以启用它们。

我试试这个：

document.getElementById("on").disabled = true; 

和：

on-off-btn.off.active.setAttribute("enable", ""); 

没有成功。我觉得我做错了吗？我的 HTML 如下所示：

    <form>
    <div class="on-off-wrapper">
    <fieldset class="enabled">
    <div label="On" title="on" class="on-off-btn on active">
    <input type="radio" id="on" name="on_off" value="on"> 
    <span>On</span></div>
    <div label="Off" title="off" class="on-off-btn off">
    <input type="radio" id="off" name="on_off" value="on"> 
    <span>Off</span></div></fieldset></div>
    </form>

这样的代码在 60 次左右总是相同的，所以这就是为什么如果我可以一次性启用所有功能会更简单。我尝试使用带有控制台的谷歌开发工具...

Answer 1

如果我正确理解您的问题，可以通过以下 DOMElement 方法禁用和启用 HTML 中的多个 checkbox 输入；

// To set input disabled 
element.setAttribute("disabled", "disabled") 

// To set input enabled
element.removeAttribute("disabled") 

结合document.querySelectorAll()，可以实现你需要的如下：

function disableAll() {

  // Select all inputs with name attribute of value on_off and iterate 
  // applying disabled attribute
  document.querySelectorAll('input[name="on_off"]').forEach(element => {

    element.setAttribute("disabled", "disabled");
  });
}

function enableAll() {

  // Select all inputs with name attribute of value on_off and iterate 
  // removing disabled attribute (to enable)
  document.querySelectorAll('input[name="on_off"]').forEach(element => {

    element.removeAttribute("disabled");
  });
}

<form>
  <div class="on-off-wrapper">
    <fieldset class="enabled">
      <div label="On" title="on" class="on-off-btn on active">
        <input type="radio" id="on" name="on_off" value="on">
        <span>On</span></div>
      <div label="Off" title="off" class="on-off-btn off">
        <input type="radio" id="off" name="on_off" value="on">
        <span>Off</span></div>
    </fieldset>
  </div>
</form>

<button onclick="enableAll()">Enable All</button>
<button onclick="disableAll()">Disable All</button>

更新

要实现以下 cmets 中提到的更新切换行为，请参阅：

// Select all radio buttons
document.querySelectorAll('input[type="radio"]').forEach(function(input) {

  // When any radio button is clicked
  input.addEventListener('click', function() {

    // 1. Reset all radio buttons to unchecked state
    document.querySelectorAll('input[type="radio"]')
      .forEach(function(reset) {
        reset.checked = false;
      });

    // 2. Create a CSS selector to select all radio buttons that match the .on or .off
    //    parent of the current radio button being clicked
    const selector = (input.parentElement.classList.contains('on') ? '.on' : '.off') +
      ' input[type="radio"]';

    // 3. Select all radio buttons by selector (ie those that match this radio buttons
    //    .on or .off parent), and set to checked
    document.querySelectorAll(selector).forEach(function(set) {
      set.checked = true;
    });
  })
});

<form>
  <div class="on-off-wrapper">
    <fieldset class="enabled">
      <div label="On" title="on" class="on-off-btn on active">
        <input type="radio" id="on" name="on_off" value="on">
        <span>On</span></div>
      <div label="Off" title="off" class="on-off-btn off">
        <input type="radio" id="off" name="on_off" value="on">
        <span>Off</span></div>
    </fieldset>
  </div>
</form>
<form>
  <div class="on-off-wrapper">
    <fieldset class="enabled">
      <div label="On" title="on" class="on-off-btn on active">
        <input type="radio" id="on" name="on_off" value="on">
        <span>On</span></div>
      <div label="Off" title="off" class="on-off-btn off">
        <input type="radio" id="off" name="on_off" value="on">
        <span>Off</span></div>
    </fieldset>
  </div>
</form>
<form>
  <div class="on-off-wrapper">
    <fieldset class="enabled">
      <div label="On" title="on" class="on-off-btn on active">
        <input type="radio" id="on" name="on_off" value="on">
        <span>On</span></div>
      <div label="Off" title="off" class="on-off-btn off">
        <input type="radio" id="off" name="on_off" value="on">
        <span>Off</span></div>
    </fieldset>
  </div>
</form>
<form>
  <div class="on-off-wrapper">
    <fieldset class="enabled">
      <div label="On" title="on" class="on-off-btn on active">
        <input type="radio" id="on" name="on_off" value="on">
        <span>On</span></div>
      <div label="Off" title="off" class="on-off-btn off">
        <input type="radio" id="off" name="on_off" value="on">
        <span>Off</span></div>
    </fieldset>
  </div>
</form>