如何将日期转换成角度为2的“ yyyy-MM-dd”格式

我想在 .ts文件中将当前日期转换为 'yyyy-MM-dd'格式。在模板中，可以很容易地使用日期管道完成。如何在打字稿中做到这一点？

模板:

{{date  | date:'yyyy-MM-dd'}}

如何转换在这种格式 'yyyy-MM-dd'打字？

我只是用这个得到当前的日期。

this.date =  new Date();

但我需要把它转换成给定的格式。

345463 次浏览
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I would suggest you to have a look into Moment.js if you have trouble with Angular. At least it is a quick workaround without spending too much time.

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最佳答案

The date can be converted in typescript to this format 'yyyy-MM-dd' by using Datepipe

import { DatePipe } from '@angular/common'
...
constructor(public datepipe: DatePipe){}
...
myFunction(){
this.date=new Date();
let latest_date =this.datepipe.transform(this.date, 'yyyy-MM-dd');
}

and just add Datepipe in 'providers' array of app.module.ts. Like this: 

import { DatePipe } from '@angular/common'
...
providers: [DatePipe]
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A simple solution would be to just write

this.date = new Date().toLocaleDateString();

date .toLocaleDateString() time .toLocaleTimeString() both .toLocaleString()

Hope this helps.

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You can also try this.

consider today's date '28 Dec 2018'(for example)

 this.date = new Date().toISOString().slice(0,10);

new Date() we get as: Fri Dec 28 2018 11:44:33 GMT+0530 (India Standard Time)

toISOString will convert to : 2018-12-28T06:15:27.479Z

slice(0,10) we get only first 10 characters as date which contains yyyy-mm-dd : 2018-12-28.

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The same problem I faced in my project. Thanks to @Umar Rashed, but I am going to explain it in detail.

First, Provide Date Pipe from app.module:

providers: [DatePipe]

Import to your component and app.module:

import { DatePipe } from '@angular/common';

Second, declare it under the constructor:

constructor(
public datepipe: DatePipe
) {

Dates come from the server and parsed to console like this:

2000-09-19T00:00:00

I convert the date to how I need with this code; in TypeScript:

this.datepipe.transform(this.birthDate, 'dd/MM/yyyy')

Show from HTML template:

\{\{ user.birthDate }}

and it is seen like this:

19/09/2000

also seen on the web site like this: dates shown as it is filtered (click to see the screenshot)

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You can also use formatDate

let formattedDt = formatDate(new Date(), 'yyyy-MM-dd hh:mm:ssZZZZZ', 'en_US')
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const formatDate=(dateObj)=>{
const days = ["Sunday","Monday","Tuesday","Wednesday","Thursday","Friday","Saturday"];
const months = ["January","February","March","April","May","June","July","August","September","October","November","December"];


const dateOrdinal=(dom)=> {
if (dom == 31 || dom == 21 || dom == 1) return dom + "st";
else if (dom == 22 || dom == 2) return dom + "nd";
else if (dom == 23 || dom == 3) return dom + "rd";
else return dom + "th";
};
return dateOrdinal(dateObj.getDate())+', '+days[dateObj.getDay()]+' '+ months[dateObj.getMonth()]+', '+dateObj.getFullYear();
}
const ddate = new Date();
const result=formatDate(ddate)
document.getElementById("demo").innerHTML = result
<!DOCTYPE html>
<html>
<body>
<h2>Example:20th, Wednesday September, 2020 <h2>
<p id="demo"></p>
</body>
</html>

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Just use:

today:string = new Date().toJSON().slice(0,10).replace(/-/g,'/');

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