There is a function that returns a number. Within this function, a string '1.10' is present, which is then converted to a number using the Number method.
The output obtained is 1.1, but the desired output is 1.10.
I have tried using methods like Number, parseFloat, and +, but have not been successful in achieving this in Angular.
Numbers should not contain trailing zeros on either side.
1.1 -> considered valid
1.10 -> considered an invalid number
01.1 -> also considered an invalid number
If there is a need to display the output with trailing zeros, the Angular DecimalPipe can be used.
import { CommonModule } from '@angular/common';
import { Component } from '@angular/core';
import { bootstrapApplication } from '@angular/platform-browser';
import 'zone.js';
@Component({
selector: 'app-root',
standalone: true,
imports: [CommonModule],
template: `
<div>string: {{str}}</div>
<div>number: {{num}}</div>
<div>number formatted with decimal pipe: {{num | number: '0.2-2'}}</div>
`,
})
export class App {
name = 'Angular';
str: string = '1.10';
num: number = parseFloat(this.str);
}
bootstrapApplication(App);
One way to achieve this is by creating a custom pipe:
ng generate pipe trailing-zero
Then update the generated pipe as follows:
@Pipe({ name: 'trailingZero', pure: false })
export class TrailingZeroPipe implements PipeTransform {
transform(value: number | string, decimalPlaces: number = 1): string {
if (typeof value === 'string') {
value = Number(value);
}
return value.toFixed(decimalPlaces);
}
}
If you are using NgModule, make sure to import it. Otherwise, if your application is based on standalone, import the pipe where you intend to use it.
For a working demonstration, check out this stackblitz link.
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