What is the process for connecting a date/time form control?

Question

What is the process for connecting a date/time form control?

My code seems to only be working for the 'title' element, while the 'docdatetime' control remains blank. Can anyone spot what I'm doing wrong?

//template ===================================================
<div class="form-group">
  <input type="text" id="title" formControlName="title" class="form-control">
</div>

<div class="form-group">
  <input type="datetime-local" id="docdatetime" formControlName="docdatetime" class="form-control">
</div>

//component.ts ===============================================
import { FormGroup, FormControl } from '@angular/forms';
..... 

export class..... 
    docForm: FormGroup;

    ngOnInit() {
        let docTitle = 'My first document';
        let docDate = 'Jun 15, 2015, 9:43:11 PM';
        this.docForm = new FormGroup({
            'title': new FormControl(docTitle),
            'docdatetime': new FormControl(new Date(docDate))
        });
    }

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angular typescript

Answer 1

Answer №1

To troubleshoot this issue, it is important to note that the DatetimeLocal property on the input has a specific format requirement of YYYY-MM-DDTHH:MM:SS.SSS, known as an ISO Date format. However, in reality, an ISO Date's format includes a Z for the timezone, indicating zero UTC offset. You can visit this link for details on ToISOString(). A simple solution would be to remove the last character, usually a Z, from new Date().toISOString().

let docTitle = 'My first document';
let docDate = 'Jun 15, 2015, 21:43:11 UTC'; //Ensure to convert to UTC for date accuracy.
this.docForm = new FormGroup({
    'title': new FormControl(docTitle),
    'docdatetime': new FormControl(new Date(docDate).toISOString().slice(0, -1))
});

IMPORTANT

Take into consideration that the value retrieved from the input will not be an actual Date, but a string instead. If you require it to be a date later on, remember to create a new Date() object using the string value.

Answer 2

To troubleshoot this issue, it is important to note that the DatetimeLocal property on the input has a specific format requirement of YYYY-MM-DDTHH:MM:SS.SSS, known as an ISO Date format. However, in reality, an ISO Date's format includes a Z for the timezone, indicating zero UTC offset. You can visit this link for details on ToISOString(). A simple solution would be to remove the last character, usually a Z, from new Date().toISOString().

let docTitle = 'My first document';
let docDate = 'Jun 15, 2015, 21:43:11 UTC'; //Ensure to convert to UTC for date accuracy.
this.docForm = new FormGroup({
    'title': new FormControl(docTitle),
    'docdatetime': new FormControl(new Date(docDate).toISOString().slice(0, -1))
});

IMPORTANT

Take into consideration that the value retrieved from the input will not be an actual Date, but a string instead. If you require it to be a date later on, remember to create a new Date() object using the string value.

Answer 3

Answer №2

One suggestion is to include the following lines in the ngOnInit section:

this.docForm.controls['docTitle'].setValue('My initial document');
this.docForm.controls['docDate'].setValue('June 15, 2015, 9:43:11 PM');

Answer 4

One suggestion is to include the following lines in the ngOnInit section:

this.docForm.controls['docTitle'].setValue('My initial document');
this.docForm.controls['docDate'].setValue('June 15, 2015, 9:43:11 PM');

Answer 5

Answer №3

Dealing with a similar issue, I managed to resolve it by converting the date/time format prior to transmitting it to the server.

For instance (UTC Brazil):

If you input "15/12/2020 22:30:00"

The output will be: '2020-12-16T01:30:00.000Z'

To perform the conversion, use the following code snippet:

var date = new Date('2020-11-06T01:30:00.000Z');
console.log(date.toLocaleDateString());
console.log(date.toLocaleString());
console.log(date.toLocaleTimeString());

Answer 6

Dealing with a similar issue, I managed to resolve it by converting the date/time format prior to transmitting it to the server.

For instance (UTC Brazil):

If you input "15/12/2020 22:30:00"

The output will be: '2020-12-16T01:30:00.000Z'

To perform the conversion, use the following code snippet:

var date = new Date('2020-11-06T01:30:00.000Z');
console.log(date.toLocaleDateString());
console.log(date.toLocaleString());
console.log(date.toLocaleTimeString());

What is the process for connecting a date/time form control?

Answer №1

IMPORTANT

Answer №2

Answer №3

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