js錯誤集

1. 對選擇的null值進行replace會出錯

       var $listTimeMinite = $("#settingDateMinite").val();  //如果該文字框裡什麼都沒有，此時為null
            if ($listTimeMinite == null || $listTimeMinite == "") {
                $listTimeMinite = 55
            } else {
                $listTimeMinite = $("#settingDateMinite").val().replace("分", "");
            }

2. 如果傳入Regex的temp為“”，則會出錯，即未定義正則

            if (temp != "") {
                    var reg = eval("/" + temp + "/g");
                    testRes = reg.test($(".specConbineMark", $(this)).text());
                    if (testRes == true) {
                        $(".specConbineMark", $(this)).text($(".specConbineMark", $(this)).text().replace(reg, currentSpecValue));
                    }
                }

3. reg.test()的值寫在if外面，用變數接收，寫在if的（）裡面好像不穩定

                testRes = reg.test($(".specConbineMark", $(this)).text());
                if (testRes == true) {
                        $(".specConbineMark", $(this)).text($(".specConbineMark", $(this)).text().replace(reg, currentSpecValue));
                }

4. bind與unbind hover，用mouseenter和mouseleave代替

                      $(".uploadImgItemPreview").unbind("hover");

                     $(".uploadImgItemPreview").bind({ "mouseenter": function () {
                        if (!$(".operateImg", $(this)).is(":animated")) {
                            $(".operateImg", $(this)).slideDown();
                        }
                         }, "mouseleave": function () {
                                  $(".operateImg", $(this)).slideUp();
                          }
                         });