DecimalPipelink

使用说明link

digitsInfolink

The value's decimal representation is specified by the digitsInfo parameter, written in the following format:

      
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      {minIntegerDigits}.{minFractionDigits}-{maxFractionDigits}
    

• minIntegerDigits: The minimum number of integer digits before the decimal point. Default is 1.

• minFractionDigits: The minimum number of digits after the decimal point. Default is 0.

• maxFractionDigits: The maximum number of digits after the decimal point. Default is 3.

If the formatted value is truncated it will be rounded using the "to-nearest" method:

      
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      {{3.6 | number: '1.0-0'}}
<!--will output '4'-->

{{-3.6 | number:'1.0-0'}}
<!--will output '-4'-->
    

localelink

locale will format a value according to locale rules. Locale determines group sizing and separator, decimal point character, and other locale-specific configurations.

When not supplied, uses the value of LOCALE_ID, which is en-US by default.

See Setting your app locale.

Examplelink

The following code shows how the pipe transforms values according to various format specifications, where the caller's default locale is en-US.

      
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      @Component({
  selector: 'number-pipe',
  template: `<div>

    <p>
      No specified formatting:
      {{pi | number}}
      <!--output: '3.142'-->
    </p>

    <p>
      With digitsInfo parameter specified:
      {{pi | number:'4.1-5'}}
      <!--output: '0,003.14159'-->
    </p>

    <p>
      With digitsInfo and
      locale parameters specified:
      {{pi | number:'4.1-5':'fr'}}
      <!--output: '0 003,14159'-->
    </p>

  </div>`
})
export class NumberPipeComponent {
  pi: number = 3.14159265359;
}