Moment.js for a simple version

GitHub Source Address: www.baidu.com

Easy to pity White

The project uses a time-date approach, using only a subset of methods, in order not to introduce a third-party library (Moment.js), which encapsulates the methods used in the project.

To implement the following features:

New Moment () // returns the current time object New moment (). UNIX () // returns the number of seconds in the current time Moment.unix (timestamp) // The number of seconds passed in, returning the time object passed in seconds New Moment (). Format (' Yyyy-mm-dd DD HH:mm:ss ')//  return value 2017-06-22 four 19:46:14  Moment.unix (1498132062000). Format (' Yyyy-mm-dd DD HH:mm:ss ')//  return value 2017-06-224 19:46:14

　

First, the base code:

1 class Moment {2     New Date (). GetTime ()) {3This         new  Date (ARG)4    }5 }

　　arg = new Date (). GetTime () : Use deconstruction here to add a default value to arg

Second, the realization of UNIX methods

class Moment {    new  date (). GetTime ()) {        thisnew  Date (ARG)    }     // GetTime () returns the number of milliseconds that need to be converted into seconds and rounded     Unix () {        return math.round (this. Date.gettime ()/+)    }} 

Unix method: Returns the number of seconds in the current time

Third, implement the static Unix method

 1  class moment { 2  constructor (arg = new   Date (). GetTime ()) { 3  this . Date = new   Date (ARG)  4  }  5   6   static UNIX (timestamp) { 7  
   
    return  
    new  Moment (timestamp * 1000
    "  
    8  
    }  
    9 } 
   

Static Unix Method: parameter timestamp number of milliseconds returns a Date object

　　

Iv. implementation of the Format method

class Moment {constructor (arg=NewDate (). GetTime ()) {         This. Date =NewDate (ARG)} format (FORMATSTR) {const Date= This. Date Const Year=date.getfullyear () const month= Date.getmonth () + 1Const Day=date.getdate () const Week=date.getday () const hour=date.gethours () const minute=date.getminutes () const second=date.getseconds ()returnFormatstr.replace (/y{2,4}| m{1,2}| d{1,2}|d{1,4}| H{1,2}|m{1,2}|s{1,2}/g, (match) = {            Switch(match) { Case' YY ':                returnString (year). Slice (-2)             Case' YYY ':             Case' YYYY ':                returnString (year) CaseM:                returnString (month) Case' MM ':                returnString (month). Padstart (2, ' 0 ')             CaseD:                returnString (Day) Case' DD ':                returnString (Day). Padstart (2, ' 0 ')             Case' d ':                returnString (week) Case' DD ':                returnWeeks[week] Case' DDD ':                return' Week ' +Weeks[week] Case' dddd ':                return' Week ' +Weeks[week] CaseH:                returnString (hour) Case' HH ':                returnString (Hour). Padstart (2, ' 0 ')             Case' m ':                returnString (minute) Case' mm ':                returnString (minute). Padstart (2, ' 0 ')             Case' s ':                returnString (second) Case' SS ':                returnString (second). Padstart (2, ' 0 ')            default:                returnMatch}}) }}

Moment.js for a simple version