Question

function populateList(givenID)//givenID from the select tag
{
  var select = document.getElementById("givenID"),
  listData = ["1","2"];
                            
  for(var i = 0; i < listData.length; i++)
    //Loops through array and creates a new DOM node and appends array contents to the object
  {
    var option = document.createElement("OPTION"),
    txt = document.createTextNode(listData[i]);
    option.appendChild(txt);
    option.setAttribute("value",listData[i]);
    select.insertBefore(option,select.lastChild);
  }
}

<body >    
    <select id="slt" whenpageloads="populateList">
         <!--When the page loads the select tag will be populated -->
        <option>
            default
        </option>
    </select>
</body>

Answer 1

您可以像阿伦在身体负荷中提到的那样调用onload。

<body onload="populateList('slt')">

或

如果要加载多个选择框，这将是更好的选择。

window.onload = function() {
   populateList('slt');
};

此外，由于给定ID是可变的，因此您的代码中还有另外一个错误。

var select = document.getElementById(givenID);

代替

var select = document.getElementById("givenID");

function populateList(givenID)//givenID from the select tag
{
  var select = document.getElementById(givenID);
  listData = ["1","2"];
                            
  for(var i = 0; i < listData.length; i++)
  {
    var option = document.createElement("OPTION"),
    txt = document.createTextNode(listData[i]);
    option.appendChild(txt);
    option.setAttribute("value",listData[i]);
    select.insertBefore(option, select.lastChild);
  }
}


window.onload = function() {
   populateList('slt');
};

<body>    
    <select id="slt">
        <option>
            default
        </option>
    </select>
</body>

当页面仅加载到特定选择标记时，如何填充选择标记？

1 个答案: