=== form表单提交 ===

  <form id="form" action="" method="post">
      <div class="weui-cells__title">用户名</div>
      <div class="weui-cells">
          <div class="weui-cell">
              <div class="weui-cell__bd">
                  <input class="weui-input" name="username" type="text" placeholder="请输入文本" emptyTips="请输入文本" value="murphy" required />
              </div>
          </div>
      </div>
      <div class="weui-cells__title">密码</div>
      <div class="weui-cells">
          <div class="weui-cell">
              <div class="weui-cell__bd">
                  <input class="weui-input" name="password" type="text" placeholder="请输入文本" emptyTips="请输入密码" notMatchTips="您输入的密码格式不对" value="" required pattern="REG_PASSWORD" />
              </div>
          </div>
      </div>
      <div class="weui-btn-area">
          <a class="weui-btn weui-btn_primary" href="javascript:formSubmit();">确定</a>
      </div>
  </form>
  
  <script type="text/javascript">
  function formSubmit() {
      weui.form.validate('#form', function(error) {
          if (!error) {
              var loading = weui.loading('提交中...');
              let formArray = $("#form").serializeArray();
              let formObj = {};
              for (var i = 0; i < formArray.length; i++) {
                  formObj[formArray[i].name] = formArray[i].value;
              }
              setTimeout(function() {
                  loading.hide();
                  weui.toast('提交成功', 3000);
              }, 1500);
          }
      }, {
          regexp: {
              PASSWORD: /^.{6,18}$/
          }
      });
  }
  </script>