Having some trouble with this issue and I've tried various solutions without success. This problem is occurring within an Angular project.
The requirement is to always display a percentage number with two decimal places, even if the user inputs a whole number.
Unfortunately, changing the data type is not an option as there is existing code relying on it being a number.
The challenge lies in TypeScript's restriction on using 'var', making it difficult to add extra zeros or round the number to two decimals without them being stripped.
Declaration:
percent: number;
Some methods I have attempted include:
1:
this.percent = Math.round(this.percent * 1e2) / 1e2;
2:
this.percent = this.percent.toFixed(2); // Error: cannot assign string to number
3:
const percentString = this.percent.toString() + '.00';
this.percent = parseFloat(percentString);
4:
this.percent = Math.round(this.percent * 100) / 100;
5: (Function from another source)
addZeroes(num) {
let value = Number(num).toString();
const res = num.split('.');
if (res.length === 1 || res[1].length < 3) {
value = parseFloat(value).toFixed(2);
}
return value;
}
this.percent = parseFloat(this.addZeroes(this.percent));
6:
this.percent = parseFloat(this.percent).toFixed(2);
7:
this.percent = parseFloat(this.percent.toString()).toFixed(2);
8:
this.percent = Number(this.percent).toFixed(2);
HTML:
<mat-form-field>
<input
matInput
[numbers]="'.'"
type="text"
maxlength="5"
[placeholder]="'Percent'"
[(ngModel)]="percent"
(change)="updateDollarAmountNew()"
numbers
name="percent">
</mat-form-field>
Attempts at using pipes in the frontend also encountered issues:
[(ngModel)]="p.percent | number : '1.2-2" // Error: pipe not found
[(ngModel)]="{{percent | number : '1.2-2'}}" // Error: unexpected token
[(ngModel)]={{percent | number : '1.2-2'}} // Error: Attribute not allowed
[(ngModel)]={{percent | number : 2}} // Error: Expected ':'
// And so forth...
Appreciate any guidance or assistance provided!