使用node.js + express插入SQLITE表，而javascript不起作用

<form action="/visitors" method="post">
                <h1>Create Invitation</h1>
                <div class="input-container"><i class="fas fa-user icon"></i><input class="input-field" type="text" placeholder="Name" name="name" id=name required></div>
                <div class="input-container"><i class="fas fa-phone icon"></i><input class="input-field" type="text" placeholder="Phone Number" name="phoneNumber" id=phone required></div>
                <div class="input-container"><i class="fas fa-envelope icon"></i><input class="input-field" type="email" placeholder="Email" name="email" id=email required ></div>
                <button class="btn-create-invitation" onclick="createInvitation()">Create Invitation</button>
                    </form>

您已经声明要提交给定操作“ / Visitors”上的数据的表单，并且该方法是post，并且您还使用客户端代码将数据发送到服务器。

您需要删除表单操作和方法以使其成为简单表单，以便onClick按钮上调用的客户端代码可以执行其工作。

<form>
                <h1>Create Invitation</h1>
                <div class="input-container"><i class="fas fa-user icon"></i><input class="input-field" type="text" placeholder="Name" name="name" id=name required></div>
                <div class="input-container"><i class="fas fa-phone icon"></i><input class="input-field" type="text" placeholder="Phone Number" name="phoneNumber" id=phone required></div>
                <div class="input-container"><i class="fas fa-envelope icon"></i><input class="input-field" type="email" placeholder="Email" name="email" id=email required ></div>
                <button class="btn-create-invitation" onclick="createInvitation()">Create Invitation</button>
                    </form>