Steps to retrieve a date from a form control

Question

Steps to retrieve a date from a form control

html

<form [formGroup]="searchForm" (ngSubmit)="search()">
  <div class="row">
    <div class="col">
      <input type="date" class="form-control" formControlName="startDate" >
    </div>
    <div class="col">
      <input type="date" class="form-control" formControlName="endDate" >
    </div>
    <div class="col">
      <button type="submit" class="btn btn-primary">Submit</button>
    </div>
  </div>
</form>

ts.

  searchForm = new FormGroup({
      startDate: new FormControl(),
      endDate: new FormControl(),
    }
  );

i need the date in this format: '2022-12-31'

but when I display it using console.log(this.searchForm.value.startDate), the output is simply:

Output : 2022-12-31

I attempted to fix this by converting startDate to a Date object like this:
startDate = new Date(this.searchForm.value.startDate)
however, the Output remained as: 1970-01-01T00:00:00

angular typescript

Answer 1

Answer №1

When dealing with an input type date that returns a string (and is fed by a string), two functions can be utilized.

formatDate(date: Date | null): string | null {
  if (date)
     return date.getFullYear()+'-'+
            ('00'+(date.getMonth()+1)).slice(-2)+'-'+
            ('00'+date.getDate()).slice(-2)
  return null
}
parseDate(value: string | null): Date | null {
  if (value)
     return new Date(value)
  return null;
}

Instead of using formControl, ngModel and ngModelChange can be used as alternatives.

<form [formGroup]="searchForm" (ngSubmit)="search()">
      <input type="date" class="form-control" 
          [ngModel]="formatDate(searchForm.get('startDate').value)"
          (ngModelChange)="searchForm.get('startDate').setValue(parseDate($event))"
         [ngModelOptions]="{standalone:true}"
 >
 ...
</form>

View the example on StackBlitz

Answer 2

When dealing with an input type date that returns a string (and is fed by a string), two functions can be utilized.

formatDate(date: Date | null): string | null {
  if (date)
     return date.getFullYear()+'-'+
            ('00'+(date.getMonth()+1)).slice(-2)+'-'+
            ('00'+date.getDate()).slice(-2)
  return null
}
parseDate(value: string | null): Date | null {
  if (value)
     return new Date(value)
  return null;
}

Instead of using formControl, ngModel and ngModelChange can be used as alternatives.

<form [formGroup]="searchForm" (ngSubmit)="search()">
      <input type="date" class="form-control" 
          [ngModel]="formatDate(searchForm.get('startDate').value)"
          (ngModelChange)="searchForm.get('startDate').setValue(parseDate($event))"
         [ngModelOptions]="{standalone:true}"
 >
 ...
</form>

View the example on StackBlitz

Answer 3

Answer №2

Obtain a YYYY-MM-DD formatted string or an empty string from the user input of type date field. Refer to <input type="date">

If the input is left blank, it will default to January 1, 1970, 00:00:00 UTC (the ECMAScript epoch). Check out the Date() constructor for more information.

const dateEmpty = new Date(“”);
const dateFromString = new Date(“2022-12-31”);
   
console.log(dateEmpty);
console.log(dateFromString);

The method of handling cases where the user leaves the date field empty is at your discretion. For instance, you could enforce input using validation with Validators.required and prevent form submission until a date is entered. Alternatively, you could assign a TypeScript type Date | null where null indicates that no date was provided.

Answer 4

Obtain a YYYY-MM-DD formatted string or an empty string from the user input of type date field. Refer to <input type="date">

If the input is left blank, it will default to January 1, 1970, 00:00:00 UTC (the ECMAScript epoch). Check out the Date() constructor for more information.

const dateEmpty = new Date(“”);
const dateFromString = new Date(“2022-12-31”);
   
console.log(dateEmpty);
console.log(dateFromString);

The method of handling cases where the user leaves the date field empty is at your discretion. For instance, you could enforce input using validation with Validators.required and prevent form submission until a date is entered. Alternatively, you could assign a TypeScript type Date | null where null indicates that no date was provided.

Steps to retrieve a date from a form control

Answer №1

Answer №2

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