Get last 7 days by names javascript-CodePudding

How to get the last seven days, from today, (by names) in java script. like if today is Wednesday, I want to get it like (Wednesday, Tuesday, Monday, Sunday, Saturday, Friday, Thursday, Wednesday).

CodePudding user response：

This should order an array to follow your wished output.

var days = ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'];
var d = new Date
var daysLastSeven =  days.slice(d.getDay() 1).concat(days.slice(0,d.getDay() 1)).reverse()

console.log(daysLastSeven)
// output:
(7) ['Wednesday', 'Tuesday', 'Monday', 'Sunday', 'Saturday', 'Friday', 'Thursday']

CodePudding user response：

Just add the days in the string array and iterate them backward by getting current date with new Date() this will return the index of current day

const weekday = ["Sunday","Monday","Tuesday","Wednesday","Thursday","Friday","Saturday"];

const d = new Date();
let day = weekday[d.getDay()];

var wanteddays = 8;
var temp = d.getDay()
while(wanteddays!=0){
    if (temp <0)
    temp = 6;
    console.log(weekday[temp]);
    temp = temp-1;
    wanteddays = wanteddays -1;
}

CodePudding user response：

function getDayName(date, len, local) {
  let newDate = new Date(date);
  let weekDays = [];

  Array(len).fill(1).forEach((subDay) => {
    newDate.setDate(newDate.getDate() - subDay);
    weekDays.push(newDate.toLocaleDateString(local, { weekday: 'long' }));
  })
  return weekDays;
}

to use:

getDayName(Date.now(), 7, 'en-EN') 
OR
getDayName('10/12/2022', 7, 'en-EN')

Typescript:

function getDayName(date: Date | string | number, len: number, local:string) {
  let newDate = new Date(date);
  let weekDays: string[] = [];

  Array(len).fill(1).forEach((subDay: number) => {
    newDate.setDate(newDate.getDate() - subDay);
    weekDays.push(newDate.toLocaleDateString(local, { weekday: 'long' }));
  })
  return weekDays;
}