Question

我正在尝试将从UI获得的日期和时间转换为时代时间。

请在下面找到我的代码。

function calculateEpoch(){ 
    var date = 11/1/2019 //obtained from ui
    var time = 11:00 //obtained from ui
    var date1 = date +"" + time;

    var someDate = new Date(date1);
    console.log("someDate : ",someDate) //getting error like Invalid Date
    someDate1 = someDate.getTime();
    console.log("someDate : ",someDate1) //getting error like someDate1 is not defined
    return someDate1 ;
}

任何人都可以帮助我提供工作代码。

Answer 1

在" "中添加""而不是var date1 = date +" " + time;

function calculateEpoch(){ 
var date = '11/1/2019' //obtained from ui
    var time = '11:00' //obtained from ui
    var date1 = date +" " + time; // <---add space here

    var someDate = new Date(date1);
    console.log("someDate : ",someDate) //getting error like Invalid Date
    someDate1 = someDate.getTime();
    console.log("someDate : ",someDate1) //getting error like someDate1 is not defined
 return someDate1 ;
}

Answer 2

function calculateEpoch(){ 
    var date = '11/1/2019' //obtained from ui
    var time = '11:00' //obtained from ui
    var date1 = `${date} ${time}`; // add a space in between the date and time,
    // your date1 was invalid because it 11/1/2019:11:00

    var someDate = new Date(date1);
    console.log("someDate : ",someDate) //getting error like Invalid Date
    someDate1 = someDate.getTime();
    console.log("someDate : ",someDate1) //getting error like someDate1 is not defined
    return someDate1 ;
}

希望这会有所帮助

Answer 3

您的date和time的前两行是从ui获得的，因此我认为这不是问题所在。（它们应该是字符串）

问题出在date1上。

您有：11/1/201911:00 无效

应为：11/1/2019 11:00

您快到了，但是您只需要在date和time之间添加一个空格即可。

function calculateEpoch(){ 
    var date = '11/1/2019'; //obtained from ui
    var time = '11:00'; //obtained from ui
    var date1 = date + " " + time;

    var someDate = new Date(date1);
    console.log("someDate : ", someDate) //getting error like Invalid Date
    someDate1 = someDate.getTime();
    console.log("someDate : ", someDate1) //getting error like someDate1 is not defined
    return someDate1;
}
calculateEpoch();

Answer 4

在与用户界面的连接和Date构造参数明确的情况下，这是一种方法：

function calculateEpoch() {
    var year = new Number(document.getElementById('uiYear').value);
    var month = new Number(document.getElementById('uiMonth').value) - 1;
    var day = new Number(document.getElementById('uiDay').value);
    var hours = new Number(document.getElementById('uiHour').value);
    var minutes = new Number(document.getElementById('uiMinute').value);
    var seconds = new Number(document.getElementById('uiSecond').value);
    var d = new Date(year, month, day, hours, minutes, seconds, 0);
    var millis = d.getTime();
    return millis
}

实际上可以在右侧的https://currentmillis.com处看到该功能（使用不同的名称）及其UI。

请注意，此Date构造函数的month参数从零开始（January为0，December为11）：https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date#Syntax

如何在javascript中将给定的日期和时间转换为纪元时间？

4 个答案: