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Vistasdate-fns | format date
Problem
I have below function that formats date string.
import { format, parseISO } from "date-fns";
export function convertDate(myDate, displayFormat) {
return format(new Date(parseISO(myDate)), displayFormat);
}
I have articles that has content such as
title: 'My title'
date: '2022-01-04'
I call the convertDate function using below:
if (articles) {
for (let i = 0; i < articles.length; i++) {
const year = convertDate(articles[i].date, "y");
years.push(year);
}
uniqueYear = [...new Set(years)];
}
My timezone is CEST.
Error
I am getting error:
Expected result:
I can call the function by using {convertDate(article.date, "PPP")} which also works.
Please help!
·
Juan Pablo Isaza
1 Respuestas
Responde la pregunta0
Running the following minimal example at runkit.com returns "2022", it doesn't throw the error described in the OP:
var dateFns = require("date-fns")
function convertDate(myDate, displayFormat) {
return dateFns.format(new Date(dateFns.parseISO(myDate)), displayFormat);
}
let articles = [{
title: 'My title',
date: '2022-01-04'
}];
convertDate(articles[0].date, "y"); // "2022"
So the error is elsewhere.
Also, the use of new Date is redundant:
dateFns.format(dateFns.parseISO(myDate), displayFormat)
is sufficient and more robust.
As suggested elsewhere, getting the year from the timestamp can be done using string manipulation, no need for casting to a Date. To get the years:
let articles = [{title: 'title 0', date: '2022-01-04'},
{title: 'title 1', date: '2020-01-04'}];
let years = articles.map(o => o.date.substring(0,4));
console.log(years);If you need it as a Date for other things (e.g. formatted month name), cast it to a Date once and reuse it.
·
Juan Pablo Isaza
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