很简单，您可以对输入使用对话框验证来防止关闭
查看此链接：https://quasar.dev/quasar-plugins/dialog#basic-validation

$q.dialog({
          title: 'Prompt',
          message: 'What is your name? (Minimum 3 characters)',
          prompt: {
            model: '',
            isValid: val => val.length > 2, // << here is the magic
            type: 'text' // optional
          },
          cancel: true,
          persistent: true
        }).onOk(data => {
          // console.log('>>>> OK, received', data)
        })
      }

也可以使用onCancel事件保存输入数据

.onCancel(async () => {
      await saveInputs();
    });