解决边界日期问题(2020,01,01)-> 2019,12,31

var now = new Date();
return new Date(now.getMonth() - 1 === 0 ? now.getFullYear() - 1 : now.getFullYear(),
                now.getDate() - 1 === 0 ? now.getMonth() - 1: now.getMonth(),
                now.getDate() - 1);

var today = new Date(); var yesterday1 =新日期(新日期()。setDate(new Date().getDate() - 1)); var yesterday2 =新的日期(Date.now() - 86400000); var yesterday3 = new Date(Date.now() - 1000*60*60*24); var yesterday4 = new Date((new Date()).valueOf() - 1000*60*60*24); 今天console.log(“:“今天+); 昨天console.log(“:”+ yesterday1); 昨天console.log(“:”+ yesterday2); 昨天console.log(“:”+ yesterday3); 昨天console.log(“:”+ yesterday4);

//Create a date object using the current time
var now = new Date();

//Subtract one day from it
now.setDate(now.getDate()-1);

解决边界日期问题(2020,01,01)-> 2019,12,31

var now = new Date();
return new Date(now.getMonth() - 1 === 0 ? now.getFullYear() - 1 : now.getFullYear(),
                now.getDate() - 1 === 0 ? now.getMonth() - 1: now.getMonth(),
                now.getDate() - 1);

你可以使用momentjs，它非常有用，你可以用这个库实现很多事情。

获取当前时间的昨天日期 时刻()。减去(1天).toString ()

以日期开头获取昨天的日期 时刻()。减去(1天).startOf(天).toString ()

我想要这样的答案:

const yesterday = d => new Date(d.setDate(d.getDate() - 1));

问题是它突变了d，所以让我们把突变藏在里面。

const yesterday = (date) => {
  const dateCopy = new Date(date);
  return new Date(dateCopy.setDate(dateCopy.getDate() - 1));
}

我们可以将其分解为一行表达式，但它变得有点难以阅读:

const yesterday = d => new Date(new Date(d).setDate(d.getDate() - 1));

我将其扩展为addDays和addMonths函数:

/** * Add (or subtract) days from a date * * @param {Number} days * @returns {Function} Date => Date + days */ const addDays = (days) => (date) => new Date(new Date(date).setDate(date.getDate() + days)); /** * Add (or subtract) months from a date * * @param {Number} months * @returns {Function} Date => Date + months */ const addMonths = (months) => (date) => new Date(new Date(date).setMonth(date.getMonth() + months)); // We can recreate the yesterday function: const yesterday = addDays(-1) // note that `now` doesn't get mutated const now = new Date(); console.log({ now, yesterday: yesterday(now) }) const lastMonth = addMonths(-1)(now); console.log({ now, lastMonth }) .as-console-wrapper { max-height: 100% !important; }

但在这一点上，你可能想开始使用date-fns addDays。