js获取任意一天零点和24点方法

小咪咪 2023-01-19 11:57 12阅读 0赞

1、获取当天零点

this.pageInfo.startTime =new Date(new Date(new Date().toLocaleDateString()).getTime());

2、获取当天24点

this.pageInfo.endTime = new Date(new Date(new Date().toLocaleDateString()).getTime() +24 * 60 * 60 * 1000 -1)

3、获取3天前的零点

this.pageInfo.startTime = new Date(new Date().setDate(new Date().getDate() - 2)).setHours(0,0,0,0);

4、获取一周前的零点

this.pageInfo.startTime = new Date(new Date().setDate(new Date().getDate() - 7)).setHours(0,0,0,0);

5、获取任意一天的零点

const getStartTime = (num) => { 
        return new Date(new Date().setDate(new Date().getDate() - num)).setHours(0,0,0,0)
    }
    getStartTime(4) //四天前

// 格式化时间
            dataFormat(date) { 
                //date是传入的时间
                let d = new Date(date);
    
                let month =
                    d.getMonth() + 1 < 10 ? "0" + (d.getMonth() + 1) : d.getMonth() + 1;
                let day = d.getDate() < 10 ? "0" + d.getDate() : d.getDate();
                let hours = d.getHours() < 10 ? "0" + d.getHours() : d.getHours();
                let min = d.getMinutes() < 10 ? "0" + d.getMinutes() : d.getMinutes();
                let sec = d.getSeconds() < 10 ? "0" + d.getSeconds() : d.getSeconds();
    
                let times =
                    d.getFullYear() +
                    "-" +
                    month +
                    "-" +
                    day +
                    " " +
                    hours +
                    ":" +
                    min +
                    ":" +
                    sec;
    
                return times;
            },
    
    //调用方法
     this.pageInfo.startTime = this.dataFormat(this.pageInfo.startTime);
     this.pageInfo.endTime = this.dataFormat(this.pageInfo.endTime);