如何使用JavaScript将日期添加到当前日期?JavaScript是否有像.NET的AddDay()那样的内置函数?
当前回答
一些扩展Date的实现https://gist.github.com/netstart/c92e09730f3675ba8fb33be48520a86d
/**
* just import, like
*
* import './../shared/utils/date.prototype.extendions.ts';
*/
declare global {
interface Date {
addDays(days: number, useThis?: boolean): Date;
addSeconds(seconds: number): Date;
addMinutes(minutes: number): Date;
addHours(hours: number): Date;
addMonths(months: number): Date;
isToday(): boolean;
clone(): Date;
isAnotherMonth(date: Date): boolean;
isWeekend(): boolean;
isSameDate(date: Date): boolean;
getStringDate(): string;
}
}
Date.prototype.addDays = function(days: number): Date {
if (!days) {
return this;
}
this.setDate(this.getDate() + days);
return this;
};
Date.prototype.addSeconds = function(seconds: number) {
let value = this.valueOf();
value += 1000 * seconds;
return new Date(value);
};
Date.prototype.addMinutes = function(minutes: number) {
let value = this.valueOf();
value += 60000 * minutes;
return new Date(value);
};
Date.prototype.addHours = function(hours: number) {
let value = this.valueOf();
value += 3600000 * hours;
return new Date(value);
};
Date.prototype.addMonths = function(months: number) {
const value = new Date(this.valueOf());
let mo = this.getMonth();
let yr = this.getYear();
mo = (mo + months) % 12;
if (0 > mo) {
yr += (this.getMonth() + months - mo - 12) / 12;
mo += 12;
} else {
yr += ((this.getMonth() + months - mo) / 12);
}
value.setMonth(mo);
value.setFullYear(yr);
return value;
};
Date.prototype.isToday = function(): boolean {
const today = new Date();
return this.isSameDate(today);
};
Date.prototype.clone = function(): Date {
return new Date(+this);
};
Date.prototype.isAnotherMonth = function(date: Date): boolean {
return date && this.getMonth() !== date.getMonth();
};
Date.prototype.isWeekend = function(): boolean {
return this.getDay() === 0 || this.getDay() === 6;
};
Date.prototype.isSameDate = function(date: Date): boolean {
return date && this.getFullYear() === date.getFullYear() && this.getMonth() === date.getMonth() && this.getDate() === date.getDate();
};
Date.prototype.getStringDate = function(): string {
// Month names in Brazilian Portuguese
const monthNames = ['Janeiro', 'Fevereiro', 'Março', 'Abril', 'Maio', 'Junho', 'Julho', 'Agosto', 'Setembro', 'Outubro', 'Novembro', 'Dezembro'];
// Month names in English
// let monthNames = ['January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December'];
const today = new Date();
if (this.getMonth() === today.getMonth() && this.getDay() === today.getDay()) {
return 'Hoje';
// return "Today";
} else if (this.getMonth() === today.getMonth() && this.getDay() === today.getDay() + 1) {
return 'Amanhã';
// return "Tomorrow";
} else if (this.getMonth() === today.getMonth() && this.getDay() === today.getDay() - 1) {
return 'Ontem';
// return "Yesterday";
} else {
return this.getDay() + ' de ' + this.monthNames[this.getMonth()] + ' de ' + this.getFullYear();
// return this.monthNames[this.getMonth()] + ' ' + this.getDay() + ', ' + this.getFullYear();
}
};
export {};
其他回答
同样的答案是:如何将天数添加到今天的日期?
function DaysOfMonth(nYear, nMonth) {
switch (nMonth) {
case 0: // January
return 31; break;
case 1: // February
if ((nYear % 4) == 0) {
return 29;
}
else {
return 28;
};
break;
case 2: // March
return 31; break;
case 3: // April
return 30; break;
case 4: // May
return 31; break;
case 5: // June
return 30; break;
case 6: // July
return 31; break;
case 7: // August
return 31; break;
case 8: // September
return 30; break;
case 9: // October
return 31; break;
case 10: // November
return 30; break;
case 11: // December
return 31; break;
}
};
function SkipDate(dDate, skipDays) {
var nYear = dDate.getFullYear();
var nMonth = dDate.getMonth();
var nDate = dDate.getDate();
var remainDays = skipDays;
var dRunDate = dDate;
while (remainDays > 0) {
remainDays_month = DaysOfMonth(nYear, nMonth) - nDate;
if (remainDays > remainDays_month) {
remainDays = remainDays - remainDays_month - 1;
nDate = 1;
if (nMonth < 11) { nMonth = nMonth + 1; }
else {
nMonth = 0;
nYear = nYear + 1;
};
}
else {
nDate = nDate + remainDays;
remainDays = 0;
};
dRunDate = Date(nYear, nMonth, nDate);
}
return new Date(nYear, nMonth, nDate);
};
为管道运营商设计的解决方案:
const addDays = days => date => {
const result = new Date(date);
result.setDate(result.getDate() + days);
return result;
};
用法:
// Without the pipeline operator...
addDays(7)(new Date());
// And with the pipeline operator...
new Date() |> addDays(7);
如果您需要更多功能,我建议查看日期fns库。
var today = new Date();
var tomorrow = new Date();
tomorrow.setDate(today.getDate()+1);
小心,因为这可能很棘手。当设置明天时,它仅在当前值与今天的年份和月份匹配时有效。然而,通常将日期设置为“32”这样的数字仍然可以很好地将其移动到下一个月。
对于不知道如何使其工作的每个人来说:有一个完整的工作代码,它并不完美,但你可以复制过去,它正在工作。
在InDesign中,在“Program Files\Adobe\Adobe InDesign 2021 \scripts\startup scripts”的启动脚本文件夹中创建.jsx。
您可以使用创意云中的Extendescript Toolkit CC制作并粘贴:
restart-design和jjmmyyyy+30应该在texte变量中。这将显示这样的日期jj/m/yyyy-idk,如何将其显示为2021 7月24日,而不是2021 7月24号,但对我来说已经足够了。
#targetengine 'usernameVariable'
function addVariables(openEvent)
{
var doc = openEvent.parent;
while ( doc.constructor.name != "Document" )
{
if ( doc.constructor.name == "Application" ){ return; }
doc = doc.parent;
}
// from http://stackoverflow.com/questions/563406/add-days-to-datetime
var someDate = new Date();
var numberOfDaysToAdd = 30;
someDate.setDate(someDate.getDate() + numberOfDaysToAdd);
var dd = someDate.getDate();
var mm = someDate.getMonth() + 1;
var y = someDate.getFullYear();
var someFormattedDate = dd + '/'+ mm + '/'+ y;
createTextVariable(doc, "jjmmyyyy+30", someFormattedDate);
}
function createTextVariable(target, variableName, variableContents)
{
var usernameVariable = target.textVariables.itemByName(variableName);
if (!usernameVariable.isValid)
{
usernameVariable = target.textVariables.add();
usernameVariable.variableType = VariableTypes.CUSTOM_TEXT_TYPE;
usernameVariable.name = variableName;
}
usernameVariable.variableOptions.contents = variableContents;
}
app.addEventListener('afterOpen', addVariables);
我的简单解决方案是:
nextday=new Date(oldDate.getFullYear(),oldDate.getMonth(),oldDate.getDate()+1);
这种解决方案在夏时制方面没有问题。此外,还可以添加/减去年、月、日等的任何抵销。
day=new Date(oldDate.getFullYear()-2,oldDate.getMonth()+22,oldDate.getDate()+61);
是正确的代码。