問題描述：

知識付費PC提交考試報錯。

解決方法：

修改的文件路徑：application/web/view/topic/question_detail.html，修改submitPaper方法。

                submitPaper: function () {
                    var vm = this;
                    if (this.timer) {
                      clearInterval(this.timer);
                      this.timer = null;
                    }
                    topicApi.submitTestPaper({
                        examination_id: this.recordId,
                        type: 2,
                        duration: this.paper.txamination_time * 60000 - this.leftTime
                    }).then(function (res) {
                        if (Object.prototype.toString.call(examTimeMap) == '[object Map]') {
                          if (examTimeMap.has(vm.recordId)) {
                            examTimeMap.delete(vm.recordId);
                            localStorage.setItem('exam_time', JSON.stringify(Array.from(examTimeMap)));
                            window.removeEventListener('beforeunload', vm.beforeunloadHandle);
                          }
                        }
                        window.location.replace(vm.$router.question_result + '?test_id=' + vm.testId + '&record_id=' + vm.recordId);
                    });
                }