javascript - 纯粹使用 javascript 使一个复选框启用所有其他复选框

Question

我真的很苦恼这个问题。我想为此使用 Jquery，但不幸的是这是不允许的。因此，为了进行一点练习，我需要让一个复选框选中以启用所有其他复选框。不，它不需要检查它们，只需启用它们即可。这是我的 HTML 代码:

<table border="0">
   <tr>
    <th id="thproductid"; colspan="2"; width="300px">Pizza</th>
    <th id="thproductid"; colspan="2"; width="150px"><input type="checkbox" name="pizzamedium" id="checkpizzamedium" onclick="Activeer(this)"> Medium</th>
    <th id="thproductid"; colspan="3"; width="50px">Aantal</th>
    <th width="100px"></th>
    <th id="thproductid"; colspan="2"; width="150px"><input type="checkbox" name="pizzalarge" id="checkpizzalarge" onclick="Activeer(this)"> Large</th>
    <th id="thproductid"; colspan="3"; width="50px">Aantal</th>
    <th width="100px"></th>
   </tr>
   <tr>
    <th id="tdid">1</th>
    <td id="tdproductid"> Margeritha</td>
    <td id="tdprijsid"> &#8364 7,50</td>
    <td id="tdcheckboxid"><input type="checkbox" name="pizzamedium" id="Margeritham" value="Pizza Margeritha M" onclick="" disabled></td>
    <td><input type="button" id="plusknopmargerithaM" value=" + " onclick="" disabled></td>
    <td><input type="button" id="minknopmargerithaM" value=" - " onclick="" disabled></td>
    <td><input type="text" size="5" name="aantalpizzasmargerithaM" id="aantalpizzasmargerithaM" value="0" disabled></td>
    <td id="tdtoevoegenknopid"; align="center" class="verstopt"><input disabled type="button" id="bestelknopmargarithaM" value="Toevoegen" onclick=""></td>
    <td id="tdprijsid"> &#8364 12,00</td>
    <td id="tdcheckboxid"><input disabled type="checkbox" name="pizzalarge" id="Margerithal" value="Pizza Margeritha L" onclick=""></td>
    <td><input disabled type="button" id="plusknopmargerithaL" value=" + " onclick=""></td>
    <td><input disabled type="button" id="minknopmargerithaL" value=" - " onclick=""></td>
    <td><input disabled type="text" size="5" name="aantalpizzasmargerithaL" id="aantalpizzasmargerithaL" value="0"></td>
    <td id="tdtoevoegenknopid"; align="center" class="verstopt"><input disabled type="button" id="bestelknopmargarithaL" value="Toevoegen" onclick=""></td>
   </tr>
   <tr>
    <th id="tdid">2</th>
    <td id="tdproductid"> Bolognaise</td>
    <td id="tdprijsid"> &#8364 9,00</td>
    <td id="tdcheckboxid"><input type="checkbox" name="pizzamedium" id="Bolognaisem" value="Pizza Bolognaise M" onclick="" disabled></td>
    <td><input disabled type="button" id="plusknopbolognaiseM" value=" + " onclick=""></td>
    <td><input disabled type="button" id="minknopbolognaiseM" value=" - " onclick=""></td>
    <td><input type="text" disabled size="5" name="aantalpizzasbolognaiseM" id="aantalpizzasbolognaiseM" value="0"></td>
    <td id="tdtoevoegenknopid"; align="center" class="verstopt"><input type="button" disabled id="bestelknopbolognaiseM" value="Toevoegen" onclick=""></td>
    <td id="tdprijsid"> &#8364 13,50</td>
    <td id="tdcheckboxid"><input type="checkbox" name="pizzalarge" id="Bolognaisel" value="Pizza Bolognaise L" onclick="" disabled></td>
    <td><input type="button" id="plusknopbolognaiseL" value=" + " onclick="" disabled></td>
    <td><input type="button" id="minknopbolognaiseL" value=" - " onclick="" disabled></td>
    <td><input type="text" size="5" name="aantalpizzasbolognaiseL" id="aantalpizzasbolognaiseL" value="0" disabled></td>
    <td id="tdtoevoegenknopid"; align="center" class="verstopt"><input type="button" id="bestelknopbolognaiseL" value="Toevoegen" onclick="" disabled></td>
   </tr>
   <tr>
    <th id="tdid">3</th>
    <td id="tdproductid"> Calzone</td>
    <td id="tdprijsid"> &#8364 10,00</td>
    <td id="tdcheckboxid"><input type="checkbox" name="pizzamedium" id="Calzonem" value="Pizza Calzone M" onclick="" disabled></td>
    <td><input type="button" id="plusknopcalzoneM" value=" + " onclick="" disabled></td>
    <td><input type="button" id="minknopcalzoneM" value=" - " onclick="" disabled></td>
    <td><input type="text" size="5" name="aantalpizzascalzoneM" id="aantalpizzascalzoneM" value="0" disabled></td>
    <td id="tdtoevoegenknopid"; align="center" class="verstopt"><input type="button" id="bestelknopcalzoneM" value="Toevoegen" onclick="" disabled></td>
    <td id="tdprijsid"> &#8364 16,50</td>
    <td id="tdcheckboxid"><input type="checkbox" name="pizzalarge" id="Calzonel" value="Pizza Calzone L" onclick="" disabled></td>
    <td><input type="button" id="plusknopcalzoneL" value=" + " onclick="" disabled></td>
    <td><input type="button" id="minknopcalzoneL" value=" - " onclick="" disabled></td>
    <td><input type="text" size="5" name="aantalpizzascalzoneL" id="aantalpizzascalzoneL" value="0" disabled></td>
    <td id="tdtoevoegenknopid"; align="center" class="verstopt"><input type="button" id="bestelknopcalzoneL" value="Toevoegen" onclick="" disabled></td>
   </tr>
   <tr>
    <th id="tdid">4</th>
    <td id="tdproductid"> Pollo</td>
    <td id="tdprijsid"> &#8364 10,00</td>
    <td id="tdcheckboxid"><input type="checkbox" name="pizzamedium" id="Pollom" value="Pizza Pollo M" onclick="" disabled></td>
    <td><input type="button" id="plusknoppolloM" value=" + " onclick..

这是我的 JS 代码:

function Activeer(adres, checkbox1id, checkbox2id, checkbox3id, checkbox4id, checkbox5id, checkbox6id, checkbox7id, checkbox8id) {
    if(adres.checked) {
        document.getElementById(checkbox1id).disabled = "";
  document.getElementById(checkbox2id).disabled = "";
  document.getElementById(checkbox3id).disabled = "";
  document.getElementById(checkbox4id).disabled = "";
  document.getElementById(checkbox5id).disabled = "";
  document.getElementById(checkbox6id).disabled = "";
  document.getElementById(checkbox7id).disabled = "";
  document.getElementById(checkbox8id).disabled = "";
    }
}

Answer 1

为所有复选框指定相同的类，然后为每个复选框指定一个 disabled 属性。*

编辑

*无需对 disabled 属性进行硬编码，演示现在能够以编程方式更改复选框的状态。

我添加了一个 JavaScript 解决方案并注释掉了 jQuery，如果您也想测试它，只需删除注释标记并将它们放在 JS 函数上即可。

var chxs = document.querySelectorAll('.chx');

var check = document.querySelector('input[type="checkbox"]');

check.addEventListener('change', function() {
  var chxArr = Array.prototype.map.call(chxs, function(obj, i) {

    if (obj.getAttribute('disabled')) {
      return obj.removeAttribute('disabled');
    } else {
      return obj.setAttribute('disabled', true);
    }
  });
}, false);

详细信息在以下代码片段的来源中进行了注释:

片段

/*
$('.chx').on('change', function() {
  $('.chx').removeAttr('disabled');
});
*/

// Collect all elements with class .chx into a NodeList
var chxs = document.querySelectorAll('.chx');

// Reference the first checkbox found
var check = document.querySelector('input[type="checkbox"]');

/*
| - Add an eventListener to the first checkbox
| - If a change event fires on the checkbox...
*/
check.addEventListener('change', function() {

  /*
  | - Convert the NodeList chxs into an array called chxArr with
  | map and call methods.
  | - On each iteration...
  */
  var chxArr = Array.prototype.map.call(chxs, function(obj, i) {

    /*
    | - If the checkbox(obj) has the attribute "disabled"...
    | -...remove the "disabled" attribute...
    | - ...otherwise add the "disabled attribute to it.
    */
    if (obj.getAttribute('disabled')) {
      return obj.removeAttribute('disabled');
    } else {
      return obj.setAttribute('disabled', true);
    }
    // Lather, rinse, and repeat...
  });
}, false);

<!doctype html>
<html>

<head>
  <meta charset="utf-8">
  <title>CHX</title>
  <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
</head>

<body>
  <div>ENABLE/DISABLE ALL
    <input type='checkbox'>
  </div>

  <input type='checkbox' class='chx'>
  <br/>
  <input type='checkbox' class='chx'>
  <br/>
  <input type='checkbox' class='chx'>
  <br/>
  <input type='checkbox' class='chx'>
  <br/>
  <input type='checkbox' class='chx'>
  <br/>
  <input type='checkbox' class='chx'>
  <br/>
  <input type='checkbox' class='chx'>
  <br/>
  <input type='checkbox' class='chx'>
  <br/>
  <input type='checkbox' class='chx'>
  <br/>
  <input type='checkbox' class='chx'>
  <br/>
  <input type='checkbox' class='chx'>
  <br/>
  <input type='checkbox' class='chx'>
  <br/>
  <input type='checkbox' class='chx'>
  <br/>
  <input type='checkbox' class='chx'>
  <br/>
  <input type='checkbox' class='chx'>
  <br/>
  <input type='checkbox' class='chx'>
  <br/>
  <input type='checkbox' class='chx'>
  <br/>
  <input type='checkbox' class='chx'>
  <br/>
  <input type='checkbox' class='chx'>
  <br/>
  <input type='checkbox' class='chx'>
  <br/>
  <input type='checkbox' class='chx'>
  <br/>
  <input type='checkbox' class='chx'>
  <br/>
  <input type='checkbox' class='chx'>
  <br/>
  <input type='checkbox' class='chx'>
  <br/>
  <input type='checkbox' class='chx'>
  <br/>
  <input type='checkbox' class='chx'>
  <br/>
  <input type='checkbox' class='chx'>
  <br/>
  <input type='checkbox' class='chx'>
  <br/>
  <input type='checkbox' class='chx'>
  <br/>
  <input type='checkbox' class='chx'>
  <br/>

</body>

</html>