JavaScript与时区的日期差异

debugcn 发表于 Dev

梅娜·帕特尔（Meena Patel）

我在javascript中非常陌生，并尝试通过设置时区获得日差。我的脚本如下

let localCurrentDate = new Date();
let booking_date = '06/11/2020';
var inputdate = booking_date + ' ' + '00:00:00 UTC+2';
const oneDay = 24 * 60 * 60 * 1000;
// date eg; "006/15/2020 00:00:00 UTC+2"
var utc2Date = inputdate;
let parsedDate = new Date(utc2Date);
//let currentDate = new Date();
let curDate = new Date(localCurrentDate.toLocaleString("en-US", {
  timeZone: "Europe/Rome"
}));
let diffTime = Math.abs(curDate - parsedDate);
let diffDays = Math.ceil(diffTime / oneDay);
//return diffDays;
console.log("input date" + parsedDate);
console.log("current date" + curDate);
console.log("day difference: " +diffDays);

但是由于我将输入日期设置为时间00:00:00，并且当前时间获取了当前时间，所以现在相差+1天了。我可以知道如何在无效时间获得日差吗？或者如何通过获取当前日期将时间设置为00:00:00？我想设置和使用时区。谢谢！

卡兰

尝试将您inputdate的UTC日期转换为日期，然后使用new Date()获取inputdate对象来获取当前时区。然后您可以得到difference。

更新了代码let parsedDate = new Date((new Date(utc2Date)).toUTCString());。

在下面检查。

let localCurrentDate = new Date();
let booking_date = '2020-06-12';
var inputdate = booking_date + ' ' + '00:00:00 UTC+2';
const oneDay = 24 * 60 * 60 * 1000;
// date eg; "006/15/2020 00:00:00 UTC+2"
var utc2Date = inputdate;
let parsedDate = new Date((new Date(utc2Date)).toUTCString());
//let currentDate = new Date();
let curDate = new Date();
let diffTime = Math.abs(curDate - parsedDate);
let diffDays = Math.ceil(diffTime / oneDay);
//return diffDays;
console.log("input date" + parsedDate);
console.log("current date" + curDate);
console.log("day difference: " +diffDays);

如果您只想与日期取得差异而不考虑时间（将时间设置为00:00:00.000），请使用date.setHours(0,0,0,0);。

这是代码片段。

let localCurrentDate = new Date();
let booking_date = '2020-06-12';
var inputdate = booking_date + ' ' + '00:00:00 UTC+2';
const oneDay = 24 * 60 * 60 * 1000;
// date eg; "006/15/2020 00:00:00 UTC+2"
var utc2Date = inputdate;
let parsedDate = new Date((new Date(utc2Date)).toUTCString());
//let currentDate = new Date();
let curDate = new Date();
curDate.setHours(0,0,0,0);   // set time to 00:00:00.000
parsedDate.setHours(0,0,0,0); // set time to 00:00:00.000
let diffTime = Math.abs(curDate - parsedDate);
let diffDays = Math.ceil(diffTime / oneDay);
//return diffDays;
console.log("input date" + parsedDate);
console.log("current date" + curDate);
console.log("day difference: " +diffDays);

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