如果选择下拉菜单自诞生以来是只读的，根本不需要更改，也许您应该使用另一个控件?比如一个简单的<div>(加上隐藏的表单字段)或一个<input type="text">?

补充:如果下拉菜单不是一直都是只读的，并且JavaScript被用来启用/禁用它，那么这仍然是一个解决方案——只需要动态修改DOM。

我用jquery解决了它:

      $("select.myselect").bind("focus", function(){
        if($(this).hasClass('readonly'))
        {
          $(this).blur();   
          return;
        }
      });

当您计划将选择设置为只读时，请将选择设置为禁用，然后在提交表单之前删除禁用属性。

// global variable to store original event/handler for save button
var form_save_button_func = null;

// function to get jQuery object for save button
function get_form_button_by_id(button_id) {
    return jQuery("input[type=button]#"+button_id);
}

// alter value of disabled element
function set_disabled_elem_value(elem_id, value)  {
    jQuery("#"+elem_id).removeAttr("disabled");
    jQuery("#"+elem_id).val(value);
    jQuery("#"+elem_id).attr('disabled','disabled');
}

function set_form_bottom_button_save_custom_code_generic(msg) {
    // save original event/handler that was either declared
    // through javascript or html onclick attribute
    // in a global variable
    form_save_button_func = get_form_button_by_id('BtnSave').prop('onclick'); // jQuery 1.6
    //form_save_button_func = get_form_button_by_id('BtnSave').prop('onclick'); // jQuery 1.7

    // unbind original event/handler (can use any of following statements below)
    get_form_button_by_value('BtnSave').unbind('click');
    get_form_button_by_value('BtnSave').removeAttr('onclick');

    // alternate save code which also calls original event/handler stored in global variable
    get_form_button_by_value('BtnSave').click(function(event){
        event.preventDefault();
        var confirm_result = confirm(msg);
        if (confirm_result) {
            if (jQuery("form.anyForm").find('input[type=text], textarea, select').filter(".disabled-form-elem").length > 0) {
                jQuery("form.anyForm").find('input[type=text], textarea, select').filter(".disabled-form-elem").removeAttr("disabled");
            }

            // disallow further editing of fields once save operation is underway
            // by making them readonly
            // you can also disallow form editing by showing a large transparent
            // div over form such as loading animation with "Saving" message text
            jQuery("form.anyForm").find('input[type=text], textarea, select').attr('ReadOnly','True');

            // now execute original event/handler
            form_save_button_func();
        }
    });
}

$(document).ready(function() {
    // if you want to define save button code in javascript then define it now

    // code below for record update
    set_form_bottom_button_save_custom_code_generic("Do you really want to update this record?");
    // code below for new record
    //set_form_bottom_button_save_custom_code_generic("Do you really want to create this new record?");

    // start disabling elements on form load by also adding a class to identify disabled elements
    jQuery("input[type=text]#phone").addClass('disabled-form-elem').attr('disabled','disabled');
    jQuery("input[type=text]#fax").addClass('disabled-form-elem').attr('disabled','disabled');
    jQuery("select#country").addClass('disabled-form-elem').attr('disabled','disabled');
    jQuery("textarea#address").addClass('disabled-form-elem').attr('disabled','disabled');

    set_disabled_elem_value('phone', '123121231');
    set_disabled_elem_value('fax', '123123123');
    set_disabled_elem_value('country', 'Pakistan');
    set_disabled_elem_value('address', 'address');

}); // end of $(document).ready function

我们还可以禁用除所选选项之外的所有选项。

这样，下拉菜单仍然可以工作(并提交其值)，但用户不能选择其他值。

Demo

<选择> <选项禁用> 1 > < /选项 <选项> 2 > < /选项 <选项禁用> 3 < /选项> < /选择>

    var selectedOpt;//initialize var
    var newIdForHidden;//initialize var
    $('.disabledOnEdit').focusin(function(){
        selectedOpt = $(this).find(":selected").val();
        newIdForHidden = $(this).attr('id')+'Hidden';
        //alert(selectedOpt+','+newIdForHidden);
        $(this).append('');
        $(this).find('input.hiddenSelectedOpt').attr('id',newIdForHidden).val(selectedOpt);
    });
    $('.disabledOnEdit').focusout(function(){
        var oldSelectedValue=$(this).find('input.hiddenSelectedOpt').val();
        $(this).val(oldSelectedValue);
    });

这个javascript找到所有的'select'与'readonly'属性，然后把disabled在'options'除了selected(回发)

文档。querySelectorAll("select[readonly] > option:not([selected])")。forEach((el) => el。setAttribute("disabled"， "disabled")); 不带readonly: <select> <选项> 1 > < /选项 <选项> 2 > < /选项 <选项> 3 < /选项> < /选择> < br > 带readonly: <select readonly="readonly"> <选项> 1 > < /选项 <选项> 2 > < /选项 <选项> 3 < /选项> < /选择>