js 手写日期转换函数

js实现日期转换函数

用yyyy,MM,dd固定字符串做替换

    const dateFormat = (date, formatter) => {
        const fDate = new Date(date)
        const day = fDate.getDate()
        const month = fDate.getMonth() + 1
        const year = fDate.getFullYear()
        return formatter.replace(/dd/, day).replace(/MM/, month).replace(/yyyy/, year)
    }
    console.log(dateFormat(new Date('2020-01-03'), 'yyyy年MM月dd日'));