日期格式化的方法-高级

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function dateFormat(time, format = 'yyyy-MM-dd hh:mm') = {

    var date = new Date(time);

    var year = date.getFullYear(),
        month = date.getMonth() + 1,//月份是从0开始的
        day = date.getDate(),
        hour = date.getHours(),
        min = date.getMinutes(),
        sec = date.getSeconds();
    var preArr = Array.apply(null, Array(10)).map(function (elem, index) {
        return '0' + index;
    });////开个长度为10的数组 格式为 00 01 02 03

    var newTime = format.replace(/yyyy/g, year)
        .replace(/MM/g, preArr[month] || month)
        .replace(/dd/g, preArr[day] || day)
        .replace(/hh/g, preArr[hour] || hour)
        .replace(/mm/g, preArr[min] || min)
        .replace(/ss/g, preArr[sec] || sec);

    return newTime;
};

测试

var date = dateFormat(new Date(), "yyyy-MM-dd");
var endTime = dateFormat(new Date(), "hh:mm");

console.log(date)
console.log(endTime)