javascript - select2 的 tabindex 问题

Question

我在使用 select2 时遇到表单上的 Taborder 问题。

我有一个输入表单，我希望用户能够按顺序浏览它。

我能够对文本输入字段进行排序，但不能对 select2 下拉列表进行排序。

问题似乎出在他们的默认 tabindex="-1"上，如下所示；

>  <div id="s2id_ctl00_MainContent_ddlAreaKept" class="select2-container
> form-control">
>     <a class="select2-choice" tabindex="-1" onclick="return false;" href="javascript:void(0)">
>     <input id="s2id_autogen4" class="select2-focusser select2-offscreen" type="text" tabindex="0">
>     <div class="select2-drop select2-display-none select2-with-searchbox">
>     </div>
>     <select id="ctl00_MainContent_ddlAreaKept" class="form-control select2-offscreen" name="ctl00$MainContent$ddlAreaKept" tabindex="-1">

我还编写了以下 JavaScript 来将 tabIndex 值添加到字段，但它没有按我想要的方式工作。

   var tabOrder = 0;

document.getElementById("ctl00_MainContent_ddlAreaKept").tabIndex = tabOrder++;
document.getElementById("ctl00_MainContent_ddlNCDYears").tabIndex = tabOrder++;
document.getElementById("ctl00_MainContent_txtVehicleValue").tabIndex = tabOrder++;
document.getElementById("ctl00_MainContent_txtAge").tabIndex = tabOrder++;
document.getElementById("ctl00_MainContent_txtForename").tabIndex = tabOrder++;
document.getElementById("ctl00_MainContent_txtSurname").tabIndex = tabOrder++;
document.getElementById("ctl00_MainContent_txtEmail").tabIndex = tabOrder++;
document.getElementById("ctl00_MainContent_txtPhoneNumber").tabIndex = tabOrder++;
document.getElementById("ctl00_MainContent_btnGetQuote").tabIndex = tabOrder++;

下拉列表不会进入，它会跳过它们并按应有的方式浏览文本框。

非常感谢任何帮助!

已解决:我尝试过:

var tabOrder = 1;

这已经解决了这个问题。我不知道为什么或如何:|

Answer 1

github上有一个解决方案，你可以创建一个js文件，然后将其包含在select2的调用下，在这个新文件中你必须粘贴以下内容:

jQuery(document).ready(function($) {
    var docBody = $(document.body);
    var shiftPressed = false;
    var clickedOutside = false;
    //var keyPressed = 0;

    docBody.on('keydown', function(e) {
        var keyCaptured = (e.keyCode ? e.keyCode : e.which);
        //shiftPressed = keyCaptured == 16 ? true : false;
        if (keyCaptured == 16) { shiftPressed = true; }
    });
    docBody.on('keyup', function(e) {
        var keyCaptured = (e.keyCode ? e.keyCode : e.which);
        //shiftPressed = keyCaptured == 16 ? true : false;
        if (keyCaptured == 16) { shiftPressed = false; }
    });

    docBody.on('mousedown', function(e){
        // remove other focused references
        clickedOutside = false;
        // record focus
        if ($(e.target).is('[class*="select2"]')!=true) {
            clickedOutside = true;
        }
    });

    docBody.on('select2:opening', function(e) {
        // this element has focus, remove other flags
        clickedOutside = false;
        // flag this Select2 as open
        $(e.target).attr('data-s2open', 1);
    });
    docBody.on('select2:closing', function(e) {
        // remove flag as Select2 is now closed
        $(e.target).removeAttr('data-s2open');
    });

    docBody.on('select2:close', function(e) {
        var elSelect = $(e.target);
        elSelect.removeAttr('data-s2open');
        var currentForm = elSelect.closest('form');
        var othersOpen = currentForm.has('[data-s2open]').length;
        if (othersOpen == 0 && clickedOutside==false) {
            /* Find all inputs on the current form that would normally not be focus`able:
             *  - includes hidden <select> elements whose parents are visible (Select2)
             *  - EXCLUDES hidden <input>, hidden <button>, and hidden <textarea> elements
             *  - EXCLUDES disabled inputs
             *  - EXCLUDES read-only inputs
             */
            var inputs = currentForm.find(':input:enabled:not([readonly], input:hidden, button:hidden, textarea:hidden)')
                .not(function () {   // do not include inputs with hidden parents
                    return $(this).parent().is(':hidden');
                });
            var elFocus = null;
            $.each(inputs, function (index) {
                var elInput = $(this);
                if (elInput.attr('id') == elSelect.attr('id')) {
                    if ( shiftPressed) { // Shift+Tab
                        elFocus = inputs.eq(index - 1);
                    } else {
                        elFocus = inputs.eq(index + 1);
                    }
                    return false;
                }
            });
            if (elFocus !== null) {
                // automatically move focus to the next field on the form
                var isSelect2 = elFocus.siblings('.select2').length > 0;
                if (isSelect2) {
                    elFocus.select2('open');
                } else {
                    elFocus.focus();
                }
            }
        }
    });

    docBody.on('focus', '.select2', function(e) {
        var elSelect = $(this).siblings('select');
        if (elSelect.is('[disabled]')==false && elSelect.is('[data-s2open]')==false
            && $(this).has('.select2-selection--single').length>0) {
            elSelect.attr('data-s2open', 1);
            elSelect.select2('open');
        }
    });

});

这对我有用，如果您想了解更多信息:https://github.com/peledies/select2-tab-fix

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