js summary of different methods for getting the current date yesterday, today, and tomorrow date

1. Method 1

1. Get the current date

  var today = new Date();

2. Get yesterday's date

  var yesterday = (-1)

3. Get the date of today

   var today = (0)

5. Get the date of tomorrow

   var tomorrow = (1)

6. The method sample code of the called method is as follows:

Get the current date yesterday, today, tomorrow date

methods: {
        
            getDay(day) {
                var today = new Date();
                var targetday_milliseconds = () + 1000 * 60 * 60 * 24 * day;
                (targetday_milliseconds); //Note that this line is the key code                
                var tYear = ();
                var tMonth = ();
                var tDate = ();
                tMonth = (tMonth + 1);
                tDate = (tDate);
                return tYear + "-" + tMonth + "-" + tDate;
            },
            doHandleMonth(month) {
                var m = month;
                if (().length == 1) {
                    m = "0" + month;
                }
                return m;
            },
        },

2. Method 2

1. Get the current date

  var today = new Date();

2. Get yesterday's date

   today .setTime(()-24*60*60*1000);
   var yesterday = today .getFullYear()+"-" + (today .getMonth()+1) + "-" + today .getDate();

3. Get the date of today

   today .setTime(today .getTime());
   var day= today .getFullYear()+"-" + (today .getMonth()+1) + "-" + today .getDate();

4. Get the date of tomorrow

   today .setTime(today .getTime()+24*60*60*1000);
   var tomorrow= today .getFullYear()+"-" + (today .getMonth()+1) + "-" + today .getDate();

Summarize:

Knowledge summary:

Summarize:

Get the current date and calculate the desired date

  {
            text: 'this month',
            onClick(picker) {
                // Get the current date                const today = new Date();
                // Get the first day of the current month                const start = new Date((), (), 1);
                // Get the last day of the current month                const end = new Date((), () + 1, 0);
                picker.$emit('pick', [start, end]);
            }
          },

1. Call this method by passing the value

 created() {
            ("yesterday:", (-1))
            ("today:", (0))
            ("tomorrow:", (1))
            ("Twenty years later:", (20 * 365))
        }

Get the current time, new Date()
day is number, getDay(-1): yesterday's date; getDay(0): today's date; getDay(1): tomorrow's date;

Attachment: js method to get the current day of the week

The Date object in JavaScript provides a way to get the current date and time. Among them, the getDay() method can return the current day of the week, with the return value of 0-6, representing Sunday to Saturday respectively.

Here is a sample code for getting the current day of the week using the Date object:

const weekDays = ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'];
const today = new Date();
const dayOfWeek = weekDays[()];
(`Today is ${dayOfWeek}`);

In the above code, we first define an array weekDays containing Sunday to Saturday. Then, we create a Date object, use the getDay() method to get the current star date, and use the array weekDays to get the corresponding day of the week name.

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