Angularjs jquery calendar with minimum code to attach datepicker, how to extend to restrict the dates from a particular day, month or year, how to make calendar to validate start and end date from one control to other after user selection, how to format date before rendering or how to disable datepicker with the help of angular ngDisabled properties are some of the common points we are going to discuss in this article, please us the plunker to check the feature
1. Minimum code to add datepicker
If we want to add the datepicker to any text box we need a directive, let's see the minimum code we need to add a datepicker
app.directive('datePicker', function(){
return{
restrict: 'A',
require: 'ngModel',
link: function(scope, elm, attr, ctrl){
elm.datepicker({
autoSize: true,
changeYear: true,
changeMonth: true,
dateFormat: attr["dateformat"] || 'mm/dd/yy',
showOn: 'button',
buttonText: '<i class="glyphicon glyphicon-calendar"></i>',
onSelect: function (valu) {
scope.$apply(function () {
ctrl.$setViewValue(valu);
});
elm.focus();
}
});
}
}
});
Let's see what we are doing here:
In this code there is no validation but it will work smooth to select the date by using datepicker, here is the HTML for our first example
<div class='col-xs-6'>
<label>Start Date</label>
<input type=text date-picker
placeholder='MM/DD/YYYY'
maxlength="10"
ng-required='true'
class='form-control'
ng-model='model1.startDate'>
</div>
<div class='col-xs-6'>
<label>End Date</label>
<input type=text date-picker
placeholder='MM/DD/YYYY'
maxlength="10"
ng-required='true'
class='form-control'
ng-model='model1.endDate'>
</div>
So far so good, but in most of the cases we need to restrict the past or future date, so we need min and max validation
2. Min & Max Date Restrinction
To min and max restriction we will use the same jquery guidelines, let's have a look what jQuery provides
To add/reduce days/month/year
minDate: '+10D' // 10 days from today (future)
minDate: '-10D' // 10 days from today (past)
minDate: '+10M' // 10 months from today (future)
minDate: '-10M' // 10 months from today (past)
minDate: '+10Y' // 10 years from today (future)
minDate: '-10Y' // 10 years from today (past)
Similarly we can use for maxDate, for more information see the jquery documentation
We can also use the combination of year month and day like "+1Y +2M +5D" etc or we can use a date as well, which we will see in our next section.
All these logics should be applied on calendar before showing the calendar, so let's add the code for it:
In our directive add following code after onSelect function:
beforeShow: function(){
if(attr["minDate"] != null)
$(elm).datepicker('option', 'minDate', attr["minDate"]);
if(attr["maxDate"] != null )
$(elm).datepicker('option', 'maxDate', attr["maxDate"]);
}
Let's say we want start date in past one month up today and end date from today to one month then, add following attribute in start and end text box html respectively, run and see the result, our calendar will be disabled for other dates (simple):
min-date='-30D' max-date='+0D'
min-date='+0D' max-date='+1M'
3. Dependent Start & End Date Restriction
In most of the cases we need dependent start and end date, to say, expiry date must not be less than manufacturing date means start date must not be greater than end date or end date must not be less than start date etc.
We don't need to add any extra code for this but we can use our min-date and max-date attribute
// in start date text box
max-date='{{model3.endDate}}'
// in end date text box
min-date='{{model3.startDate}}'
When you will open any text box first time, there would not be any restriction, say, first we open the end date calendar and it allow us to select any date, once we select any date our start date cannot allow to select any date greater than end date and vise versa.
You might ask, if I want to allow only the future date then? Right, you can use this by putting the min-date='+0D' in your start date text box, try this and select past date first from end date and then try to select any start date and see the magic.
Same logic you can apply for future date by putting max date in our end date text box max-date='+0D'.
Here is the complete code for this datepicker:
<div class='col-xs-6'>
<label>Start Date</label>
<input type=text date-picker
placeholder='MM/DD/YYYY'
maxlength="10"
ng-required='true'
class='form-control'
ng-model='model3.startDate'
max-date='{{model3.endDate}}'>
</div>
<div class='col-xs-6'>
<label>End Date</label>
<input type=text date-picker
placeholder='MM/DD/YYYY'
maxlength="10"
ng-required='true'
class='form-control'
ng-model='model3.endDate'
min-date='{{model3.startDate}}'>
</div>
4. Format Date On Load
When we get date from database we get something like this 2018-01-17T17:30:49-0300 or some times string like this 01-17-2018, let's put these values on our model and see how it looks in our datepicker?
$scope.model4 = {
startDate: '2018-01-17T17:30:49-0300',
endDate: '01-17-2018'
}
You will notice, it shows whatever we have on our model, right? So how to format it when we load the page or user do the copy and paste?
Add following lines in our directive, inside the link function:
ctrl.$formatters.unshift(function(value) {
if(value && moment(value).isValid()){
return moment(new Date(value)).format('MM/DD/YYYY');
}
return value;
})
Note here we use momentjs to check if the provided date is valid or not and format date in my format MM/DD/YYYY. See the last line return value;, we check the value if not a valid value, don't format it just use it whatever it is. If you want you can clear the value if it is not a valid value, it's up to your need.
Now run the application and see both our date will show 01/17/2018, that's what we want.
5. Disable Datepicker icon with ng-disabled
If text box is disabled calendar should also be disabled. Try to get the answer from web, we get many different ways but nothing works :). Let's create the model like model5:
$scope.model5 = {
startDate: null,
endDate: null,
disabled: false
}
Now bind the dates and checkbox to switch between true and false, note the change in text box attribute ng-disabled='model5.disabled' to disable the text box:
<div class='col-xs-5'>
<label>Start Date</label>
<input type=text date-picker
placeholder='MM/DD/YYYY'
maxlength="10"
ng-required='true'
class='form-control'
ng-disabled='model5.disabled'
ng-model='model5.startDate'>
</div>
<div class='col-xs-5'>
<label>End Date</label>
<input type=text date-picker
placeholder='MM/DD/YYYY'
maxlength="10"
ng-required='true'
class='form-control'
ng-disabled='model5.disabled'
ng-model='model5.endDate'>
</div>
<div class='col-xs-2'>
<label>
<input type='checkbox'
ng-click='model5.disabled = !model5.disabled'/> Disable
</label>
</div>
Click on checkbox to disable the text box and click on calendar, we will be able to change the date. so disabling the text box is not enough, we need to disable the calendar as well.
jQuery Datepicker document says to disable the calendar use following code:
$("#somdId").datepicker( "option", "disabled", true );
So when this code need to be executed, at the time of initializing the page or any time, every one will have different answer. Take our previous example it is dynamic, so it's better enable or disable dynamically because in some cases we need to disable the control conditionally.
We will add a watch to check the ng-disabled value of control where we used our directive, add following code in our directive:
scope.$watch(attr.ngDisabled, function (newVal) {
if(newVal === true)
$(elm).datepicker("disable");
else
$(elm).datepicker("enable");
});
Not switch to disable mode and click on calendar icon, datepicker is also disabled and not opening our calendar any more.
We use some CSS to place the calendar icon in text box and show the red/green border for valid and invalid dates, here is what we used:
.ui-datepicker-trigger{
position: absolute;
margin-top: -28px;
right:15px;
border:none;
background-color:transparent;
}
.ng-valid{
border-left: 2px solid #090;
}
.ng-invalid{
border-left: 2px solid #900;
}
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Having 13+ years of experience in Microsoft Technologies (C#, ASP.Net, MVC and SQL Server). Worked with Metaoption LLC, for more than 9 years and still with the same company. Always ready to learn new technologies and tricks.
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| By Ali Adravi On 26 Dec, 17 Viewed: 5,172 |
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