date-plus

date-plus

Javascript dates extended with dateformat

• Tiny wrapper function to create dates
• returns normal Date objects extended with .format()
• uses the built-in date parser, fixes a parser annoyance in ES5
• unlike dateformat, format() doesn't throw if the date is invalid
• choice of language strings - currently de and en are included

installation

$ npm install date-plus

usage

var date = require('date-plus');

// parse using native javascript parser
var d = date('5/10/2015');

// format
var output = d.format('ddd, dd mmm yyyy HH:MM:ss Z');

// or use a predefined mask
var output = d.format('expiresHeaderFormat');

// shortcut for date(d).format(fmt) - 2nd arg format string
var output = date(d, fmt);

// non-truthy input means current date/time
var now = date('');

var d = date('inva/lid/date');
var isValid = d.valid;          // false
var output = d.format();        // 'No Date'

// set language to german
date.lang('de');

// access dateformat masks
date.dateformat.masks.shortDate = ('yyyy.mm.dd');

format patterns

format masks

parsing yyyy-mm-dd

ES5 interprets strings matching yyyy-mm-dd as UTC even when running in other timezones.

E.g. 2015-9-15 is assumed to be midnight on that date in the local timezone

But 2015-10-15 is interpreted as midnight on that date in the UTC timezone because the date uses an ISO format and has a 2-digit month. This is problematic e.g. for code parsing unpadded dates passed via JSON.

This module provides a small polyfill to parse yyyy-mm-dd dates as local even in ES5.

credits

• this package includes dateformat.js from dateformat
• which was based on Steven Levithan's date-time-format
• additional inspiration from PhantomJS-DatePolyfill