更改选择列表的选项数组

Question

有没有办法使用javascript或mootools更改html选择列表的选项数组？

我需要用新的选项替换整个选项集.在我的ajax响应中,我收到一个填充了新HTML选项的数组,因此我尝试清空旧列表并添加新值,如下所示

$('element').options.length=0;
for (i=0; i<newSet.length; i++)
{
    $('element').options[i]=newSet[i];
}

上面的代码在循环内的行上给了我一个未被捕获的异常.

未捕获异常:[例外..."意外错误"nsresult:"0x8000ffff(NS_ERROR_UNEXPECTED)"位置:"JS框架

只是添加对我有用的东西:

/* get new options from json*/
var new_options = response.options;

/* Remove all options from the select list */
$('idresource').empty();
/* Insert the new ones from the array above */
for (var key in new_options)
{
var opt = document.createElement('option');
    opt.text = new_options[key];
    opt.value = key;
    $('idresource').add(opt, null);
}

Answer 1

var new_options = ['Option 1', 'Option 2', 'Option 3'];

/* Remove all options from the select list */
$('yourSelectList').empty();

/* Insert the new ones from the array above */
$each(new_options, function(value) {
    new Element('option')
        .set('text', value)
        .inject($('yourSelectList'));
});

Answer 2

HTML

<select class="element">
    <option value="1">One</option>
    <option value="2">Two</option>
    <option value="3">Three</option>
</select>

<button><<<</button>

<select class="newSel">
    <option value="11">NewOne</option>
    <option value="22">NewTwo</option>
    <option value="33">NewThree</option>
</select>

使用Javascript

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>

$("button").click(function(){
    var oldSel = $('.element').get(0);

    while (oldSel.options.length > 0) {
        oldSel.remove(oldSel.options.length - 1);
    }

    var newSel = $('.newSel').get(0);

    for (i = 0; i < newSel.length; i++)
    {
        var opt = document.createElement('option');

        opt.text = newSel.options[i].text;
        opt.value = newSel.options[i].value;

        oldSel.add(opt, null);
    }
})

演示

Answer 3

var newOptionsHtml = "<option value='2'>New Option 1</option><option value='3'>New Option 2</option>";

$("#test").html(newOptionsHtml);

Answer 4

香草JS解决方案

var arrOptions = [];
arrOptions.push("<option value='' selected>Select from List...</option>");
arrOptions.push("<option value='Trust Deposit'>Trust Deposit</option>");
arrOptions.push("<option value='Operating Deposit'>Operating Deposit</option>");

document.getElementById("selectInput").innerHTML = arrOptions.join();

如果您已经有一组选项

var arrOptions = [];
var arrOptionsCollection = document.getElementById("check_typeInput").options;
for (var i=0, n = arrOptionsCollection.length; i < n; i++) { // looping over the options
    if (arrOptionsCollection[i].value) {
        arrOptions.push("<option value='" + arrOptionsCollection[i].value + "'>" + arrOptionsCollection[i].text + "</option>");
    }
}
arrOptions.push("<option value='Trust Deposit'>Trust Deposit</option>");
arrOptions.push("<option value='Operating Deposit'>Operating Deposit</option>");

document.getElementById("selectInput").innerHTML = arrOptions.join();