Bootstrap v5.2.1 Modal初始化报错：TypeError无法读取backdrop属性

在使用Bootstrap v5.2.1的Modal组件时，出现报错：TypeError Cannot read properties of undefined (reading 'backdrop')。该问题已在bug tracker中记录，但无法稳定复现；测试多种浏览器、浏览器版本及操作系统后，仅部分浏览器会触发此问题。

初始化Modal的JavaScript代码 #

if (bootstrap == undefined) {
    document.getElementById("browser-not-supported-container").classList.remove("d-none");
} else {
    modal1 = new bootstrap.Modal(document.getElementById('modal1'));
    modal2 = new bootstrap.Modal(document.getElementById('modal2'));
    modal3 = new bootstrap.Modal(document.getElementById('modal3'));
}

Modal的HTML结构 #

<!-- Modal 1-->
<div class="modal fade text-start" data-bs-backdrop="static" data-bs-keyboard="false" id="modal1" tabindex="-1" role="dialog">
    <div class="modal-dialog modal-dialog-centered" role="document">
        <div class="modal-content">
            <div class="modal-header">
                <!-- Header -->
            </div>
            <div class="modal-body">
                <!-- Body -->
            </div>
        </div>
    </div>
</div>

<!-- Modal 2-->
<div class="modal fade text-start" id="modal2" tabindex="-1" role="dialog">
    <div class="modal-dialog modal-dialog-centered" role="document">
        <div class="modal-content">
            <div class="modal-body text-center">
                <!-- Body -->
            </div>
        </div>
    </div>
</div>

<!-- Modal 3-->
<div class="modal fade text-start" id="modal3" tabindex="-1" role="dialog">
    <div class="modal-dialog modal-dialog-centered" role="document">
        <div class="modal-content">
            <div class="modal-body text-center">
                <!-- Body -->
            </div>
        </div>
    </div>
</div>

具体报错信息 #

TypeError Cannot read properties of undefined (reading 'backdrop') 
    https://example.com/:lineNo3:colNo3 Ni._initializeBackDrop
    https://example.com/:lineNo2:colNo2 new Ni
    https://example.com/:lineNo1:colNo1 HTMLDocument.<anonymous>

注：lineNo1对应modal2的初始化位置。

已尝试的操作（无效） #

手动为每个Modal实例添加配置项后，报错仍未消除：

modal1 = new bootstrap.Modal(document.getElementById('modal1'), { backdrop: "static", keyboard: false });
modal2 = new bootstrap.Modal(document.getElementById('modal2'), { backdrop: "static", keyboard: false });
modal3 = new bootstrap.Modal(document.getElementById('modal3'), { backdrop: "static", keyboard: false });

内容的提问来源于stack exchange，提问作者Naga Sai Rohith Devarasetty