countdown-cbd-roywu/src/countdown.js

车巴达前端倒计时通用模块

let sid;
let surplus = {
    hour: '00',
    minute: '00',
    second: '00'
};

function countDownByDate(startTime = new Date().getTime(), endTime = new Date().getTime()) {
    if(typeof startTime == 'string') {
        startTime = new Date(startTime).getTime()
    }
    if(typeof endTime == 'string') {
        endTime = new Date(endTime).getTime()
    }
    let runTime = parseInt((endTime - startTime) / 1000);
    clearInterval(sid);
    sid = setInterval(() => {
        runTime = runTime - 1;
        surplus = calculateTime(runTime);
    }, 1000)
}

function countDownBySecond(runTime) {
    clearInterval(sid);
    sid = setInterval(() => {
        runTime = runTime - 1;
        surplus = calculateTime(runTime);
    }, 1000)
}

function calculateTime(runTime) {
    if (runTime < 0) {
        clearInterval(sid);
        return;
    }
    var hour = Math.floor(runTime / 3600);
    if (hour < 10) {
        hour = '0' + hour.toString();
    } else {
        hour = hour.toString();
    }
    runTime = runTime % 3600;
    var minute = Math.floor(runTime / 60);
    if (minute < 10) {
        minute = '0' + minute.toString();
    } else {
        minute = minute.toString();
    }
    runTime = runTime % 60;
    var second = runTime;
    if (second < 10) {
        second = '0' + second.toString();
    } else {
        second = second.toString();
    }
    return {
        hour,
        minute,
        second
    }
}

export { countDownByDate, countDownBySecond, surplus }