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Reset select value to default

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暗喜
暗喜 2020-11-27 03:52

I have select box
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  • 一向
    2020-11-27 04:11

    If using Spring forms, you may need to reset the selected to your options label. You would set your form:select id value to an empty string resets your selection to the label as the default.

    <form:select path="myBeanAttribute" id="my_select">
    <form:option value="" label="--Select One--"/>
    <form:options items="${mySelectionValueList}"/>
</form:select>

 $("#reset").on("click", function () {
        $("#my_select").val("");
 });

    in the case where there's a reset button. Otherwise

    $("#my_select").val("");
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  • 悲哀的现实
    2020-11-27 04:12

    I was trying to resolve it like the other answers unfortunately, I didn't get a right way to do it, once I tried as I write below:

    $('#<%=ddID.ClientID %>').get(0).selectedIndex = 0;

    this code works for me, I hope that will be useful for you guys.

    Best Regards.

    Samuel Alvarado.

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  • 不思量自难忘°
    2020-11-27 04:14

    For those who are working with Bootstrap-select, you might want to use this:

    $('#mySelect').selectpicker('render');
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  • 星月不相逢
    2020-11-27 04:14 
    $('#my_select').find('option:not(:first)').remove();

    Call this function each time before populating the select

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  • 北海茫月
    2020-11-27 04:19

    You can make use of the defaultSelected property of an option element:

    Contains the initial value of the selected HTML attribute, indicating whether the option is selected by default or not.

    So, the DOM interface already keeps track which option was selected initially.

    $("#reset").on("click", function () {
    $('#my_select option').prop('selected', function() {
        return this.defaultSelected;
    });
});

    DEMO

    This would even work for multi-select elements.

    If you don't want to iterate over all options, but "break" after you found the originally selected one, you can use .each instead:

    $('#my_select option').each(function () {
    if (this.defaultSelected) {
        this.selected = true;
        return false;
    }
});

    Without jQuery:

    var options = document.querySelectorAll('#my_select option');
for (var i = 0, l = options.length; i < l; i++) {
    options[i].selected = options[i].defaultSelected;
}
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