Angular: Populating a date field using a dropdown menu selection

Question

Angular: Populating a date field using a dropdown menu selection

Imagine there's a dropdown menu in my application, with options like "WORK", "RELEASE", and "OPEN". There's also a calendar field that is initially empty. When I choose the option "RELEASE" from the dropdown menu, I want it to automatically select today's date on the calendar field. The code snippet for this scenario can be found in form.component.html:

<form [formGroup]="form">
    <div class="flex">
        <div class="col-3">
            <div class="flex flex-row align-items-center">
                <label class="col-6">Status</label>
                <p-dropdown
                    [options]="workStatus"
                    [showClear]="true"
                    formControlName="workingStatus"
                    class="col-6">
                </p-dropdown>
            </div>
            <div class="flex flex-row align-items-center">
                <label class="col-6">Date</label>
                <p-calendar formControlName="getWorkDate"
                            dateFormat="dd-mm-yyyy"
                            dataType="localdate"
                            appendTo="body"
                            class="col-6">
                </p-calendar>

To ensure that today's date is selected on the calendar, I have implemented a function in form.component.ts:

selectTodaysDate(DateToday: number[]) {
    const todayDate = new Date().getDate();
    this.form.patchValue({getWorkDate: DateToday.find(today => today == todayDate)});
}

Now, the challenge lies in triggering the dropdown menu when "RELEASE" is selected. How can I achieve this interactivity?

angular typescript primeng angular13

Answer 1

Answer №1

If you want to handle changes using the onchange event, take a look at the events table in the Dropdown documentation.

<p-dropdown
    [options]="workStatus"
    [showClear]="true"
    formControlName="workingStatus"
    (onChange)="onDropdownChange($event.value)"
    class="col-6"
    >
</p-dropdown>

onDropdownChange(value) {
  if (value == 'RELEASE')
    this.form.controls["getWorkDate"].setValue(new Date());
}

Check out a Sample Demo on StackBlitz

Just a heads up:

When using <p-calendar>, make sure the dateFormat is dd-mm-yy and not dd-mm-yyyy. For more information, refer to the DateFormat section.

Answer 2

If you want to handle changes using the onchange event, take a look at the events table in the Dropdown documentation.

<p-dropdown
    [options]="workStatus"
    [showClear]="true"
    formControlName="workingStatus"
    (onChange)="onDropdownChange($event.value)"
    class="col-6"
    >
</p-dropdown>

onDropdownChange(value) {
  if (value == 'RELEASE')
    this.form.controls["getWorkDate"].setValue(new Date());
}

Check out a Sample Demo on StackBlitz

Just a heads up:

When using <p-calendar>, make sure the dateFormat is dd-mm-yy and not dd-mm-yyyy. For more information, refer to the DateFormat section.

Answer 3

Answer №2

To link the change event to a dropdown menu, follow these steps and adjust accordingly based on your requirements.

For example:

HTML :

<p-dropdown  
[options]="workStatus"
[showClear]="true"
formControlName="workingStatus"
class="col-6"  
(onChange)="onChange($event)">
</p-dropdown>

In the TS file, you can set conditions that will determine whether to enable your calendar.

onChange(event) {
    console.log('event :' + event);
    console.log(event.value);
    if(event.value === "RELEASE"){
     this.selectTodaysDate(params); // Function call
   // Alternatively, you can update form value like this
     const todayDate = new Date().getDate();
     this.form.patchValue({getWorkDate: DateToday.find(today => today == todayDate)});
   }
}

An existing function is available for use:

selectTodaysDate(DateToday: number[]) {
        const todayDate = new Date().getDate();
        this.form.patchValue({getWorkDate: DateToday.find(today => today == todayDate)});
    }

Answer 4

To link the change event to a dropdown menu, follow these steps and adjust accordingly based on your requirements.

For example:

HTML :

<p-dropdown  
[options]="workStatus"
[showClear]="true"
formControlName="workingStatus"
class="col-6"  
(onChange)="onChange($event)">
</p-dropdown>

In the TS file, you can set conditions that will determine whether to enable your calendar.

onChange(event) {
    console.log('event :' + event);
    console.log(event.value);
    if(event.value === "RELEASE"){
     this.selectTodaysDate(params); // Function call
   // Alternatively, you can update form value like this
     const todayDate = new Date().getDate();
     this.form.patchValue({getWorkDate: DateToday.find(today => today == todayDate)});
   }
}

An existing function is available for use:

selectTodaysDate(DateToday: number[]) {
        const todayDate = new Date().getDate();
        this.form.patchValue({getWorkDate: DateToday.find(today => today == todayDate)});
    }

Angular: Populating a date field using a dropdown menu selection

Answer №1

Answer №2

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