Develop Reference

Disable Previous Dates in Datepicker with Javascript

I Am Kinda New in Javascript and I want to Disable Previous Dates from Today
I used this code to display Datepicker
<input type="text" onfocus="(this.type='date')" id="leaveTo" name="leaveTo" placeholder="DD-MM-YYYY" style="width:fit-content;">

If I got your question right, you need to make some dates to be unselectable.
That can be done by using max, min attributes.
For more information take a look: https://developer.mozilla.org/en-US/docs/Web/HTML/Element/input/date#Additional_attributes
<input type="date" min="2020-12-23">

i need to make the date I not permitted to choose a date in the past by js?

I have an input field in booking form. the type of input is type="date". I need to make it so that you cannot choose a date in the past, so I want the minimum date to be equal to today's date using javascript.
<div class="go">
<label>Going Date:</label>
<input type="date" id="goingDate" name="go" min="">
</div>
<script>
var mydate= new Date();
document.getElementByid("goingDate").min=mydate;
</script>

Manual typing format of date

I am using ng-pick-datetime for selecting and displaying dates. I have changed to format of the date to DD/MM/YYYY using dateTimeAdapter.setLocale('en-IN') in constructor. If I click the calendar and select the date Its in format of DD/MM/YYYY but If I manually type 03/28/2019, it still accepts. I want to restrict other format except DD/MM/YYYY even on typing. Please help me out.
Code
<input (ngModelChange)="onChangeDate($event)" [(ngModel)]="dob" name="date" [owlDateTimeTrigger]="dt1" [owlDateTime]="dt1" required>
<owl-date-time class="" [pickerType]="'calendar'" [startView]="'multi-years'" #dt1></owl-date-time>
import { DateTimeAdapter } from 'ng-pick-datetime';
constructor(dateTimeAdapter: DateTimeAdapter<any>){dateTimeAdapter.setLocale('en-IN');}

There are several ways to validate your input. Here I have provided solution to your problem.
https://stackblitz.com/edit/ng-pick-datetime-format-i18n-qwhyb3?embed=1&file=src/app/app.component.html
I have added type of input as "text", pattern as you needed "DD/MM/YYYY" and background css to get valid and invalid status of input tag.
<input type="text" pattern="^([0-2][0-9]|(3)[0-1])(\/)(((0)[0-9])|((1)[0-2]))(\/)\d{4}$" (ngModelChange)="onChangeDate($event)" [(ngModel)]="dob" name="date" [owlDateTimeTrigger]="dt1" [owlDateTime]="dt1" required>

Requiring HTML form date fields to be within certain time frame parameters

I have a few dates on an HTML form that I would like to constrain to certain parameters. To map it out a little:
Date A must not be in the future (this is already being accomplished via some javascript)
Date B must not be before A and must not be more than a day after A (so if A is 01/01/2020 then B can't be 01/03/2020)
Date C must not be before any other date and must not be more than a day after B
Date D must not be before any other date and must not be more than a day after C
I've tried a number of suggested methods but can't seem to get it working the way I'd like. I'm very new to this and would really appreciate any help.
I'm not sure that a copy of anything I've tried would be helpful here, but I can give some examples if it's needed...
the html is below:
Date A:<input type="date" id="txtDate1" min="2020-01-01" name="A" required>
Date B:<input type="date" id="txtDate2" min="2020-01-01" name="B" required>
Date C:<input type="date" id="txtDate3" min="2020-01-01" name="C" required>
Date D:<input type="date" id="txtDate4" min="2020-01-01" name="D" required>

Date Pick Day Month Year

http://keith-wood.name/datepick.html
but the only thing i can see is fetch an alert of the whole time day month
$(function() {
$('#popupDatepicker').datepick();
$('#inlineDatepicker').datepick({onSelect: showDate});
});
function showDate(date) {
alert('The date chosen is ' + date);
}
i want to know how do i make them split up to like
<input type="text" name="date" id="popupDatepicker"> When i select date here the fields in the hidden will change below
<input type="hidden" name="day">
<input type="hidden" name="month">
<input type="hidden" name="year">
Please advise

The problem with the date picker's onselect handler is that passes the date as a string using whatever format you've put onto the date picker.
You can use $('#inlineDatepicker').datepicker('getDate') to get an actual Date object representing the selected date.
You can also use $.datepicker.formatDate() to convert that object into alternative string formats, or use the Date object's own methods to extract the numeric values.