js 比较日期（年月日、年月）的方法总结

迷南。 2023-01-01 03:46 397阅读 0赞

## 比较年月日 ##

思路：转为毫秒时间计算

## 比较年月 ##

//比较年月
    function compareMon(that, date1, date2) { 
        var arr1 = date1.split('-');
        var arr2 = date2.split('-');
        var data1 = Date.parse(date1.replace(/-/g, "/"));
        var data2 = Date.parse(date2.replace(/-/g, "/"));
        var datadiff = data2 - data1;
        var time = 12;
        var diffY = Math.abs(arr1[0] - arr2[0]);
        var flag = true;
        if (arr1[0] == arr2[0]) { //同年
            if (arr2[1] > arr1[1]) { 
                if (arr2[1] - arr1[1] > 12) {  //月间隔超过12个月
                    that.timeFlag = false;
                    that.currentDate = new Date();
                    alert('月选择间隔不能超过 12 个月');
                    return false;
                }else { 
                    that.timeFlag = true;
    
                }
            }else if(arr2[1]==arr1[1]){ 
                that.timeFlag = false;
                that.currentDate = new Date();
                alert('同年开始月份不能等于结束月份');
                return false;
            }else{ 
                that.timeFlag = false;
                that.currentDate = new Date();
                alert('同年开始月份不能大于结束月份');
                return false;
            }
        } else if (arr2[0] > arr1[0]) {  //不同年
                if (arr2[0] - arr1[0] > 1) { 
                    that.timeFlag = false;
                    that.currentDate = new Date();
                    alert('月选择间隔不能超过 12 个月');
                    return false;
                } else if (arr2[0] - arr1[0] == 1) { 
                    if(13 - Math.abs(arr1[1]) + Math.abs(arr2[1]) > 12){ 
                        that.timeFlag = false;
                        that.currentDate = new Date();
                        alert('月选择间隔不能超过 12 个月');
                        return false;
                    }else if (arr1[1] + 12 - arr2[1] < 12) {  //月相隔大于12个月
                        that.timeFlag = false;
                        that.currentDate = new Date();
                        alert('月选择间隔不能超过 12 个月');
                        return false;
                    }else { 
                        that.timeFlag = true;
    
                    }
                } else if(arr2[0] - arr1[0] == 0){ 
                    that.timeFlag = false;
                    that.currentDate = new Date();
                    alert('月选择间隔不能超过 12 个月');
                    return false;
                }
            } else { 
                that.timeFlag = false;
                that.currentDate = new Date();
                alert('开始年份不能大于结束年份');
                return false;
            }
    
    
    }