I have date object:
dateObj = new Date(year, month, date[, hours, minutes, seconds, ms] )
How to get dateObj - 1 day?
dateObj.setDate(dateObj.getDate()-1);
通过减去一天(1000 毫秒 * 60 秒 * 60 分钟 * 24 小时):
new Date(+new Date(year, month, date[, hours, minutes, seconds, ms] ) - 1000*60*60*24);
Some useful functions that doesnt mutate the orignal date object:
function prevDate(date) {
let copy = new Date(date.valueOf());
return new Date(copy.setDate(copy.getDate() - 1));
}
function nextDate(date) {
let copy = new Date(date.valueOf());
return new Date(copy.setDate(copy.getDate() + 1));
}
Have a look at the moment.js library https://momentjs.com/docs/
To get the date previous day you would simply need to do...
moment().add(-1, 'days');
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