date format js

utils-date.js

export const formatToStandardDate = (unixTimeStamp, format) => {
  // *1000 to convert unix timestamp in ms to s
  const currentDate = new Date(unixTimeStamp*1000);
  
  const mon=['Jan','Feb','Mar','Apr','May','Jun','Jul','Aug','Sep','Oct','Nov','Dec'];
  const fullMon=['January','February','March','April','May','June','July','August','September','October','November','December'];
  const days=['Sun','Mon','Tue','Wed','Thu','Fri','Sat'];
  const fullDays=['Sunday','Monday','Tuesday','Wednesday','Thursday','Friday','Saturday'];

  let regex=new RegExp("DDDD","g");
  format=format.replace(regex, fullDays[this.getDay()]);
  regex=new RegExp("DDD","g");
  format=format.replace(regex, days[this.getDay()]);
  regex=new RegExp("dd","g");
  format=format.replace(regex,this.getDate());
  regex=new RegExp("MMMM","g");
  format=format.replace(regex, fullMon[this.getMonth()]);
  regex=new RegExp("MMM","g");
  format=format.replace(regex, mon[this.getMonth()]);
  regex=new RegExp("MM","g");
  format=format.replace(regex,this.getMonth()+1);
  regex=new RegExp("yyyy","g");
  format=format.replace(regex, this.getFullYear());
  regex=new RegExp("yy","g");
  format=format.replace(regex, this.getFullYear().toString().substr(2,2));
  regex=new RegExp("mm","g");
  format=format.replace(regex, this.getMinutes());
  regex=new RegExp("hh","g");
  format=format.replace(regex, this.getHours());
  regex=new RegExp("ss","g");
  format=format.replace(regex, this.getSeconds());
  regex=new RegExp("ms","g");
  format=format.replace(regex, this.getMilliseconds());
  return format;
}