fix(autoDecimalDigits): use the maximumFractionDigits of the number f…

…ormat

src/numberInput.ts

@@ -1,5 +1,5 @@
 import { DECIMAL_SEPARATORS, NumberFormat } from './numberFormat'
-import { AutoDecimalModeNumberMask, DefaultNumberMask, NumberMask } from './numberMask'
+import { AutoDecimalDigitsNumberMask, DefaultNumberMask, NumberMask } from './numberMask'
 import { NumberFormatStyle, NumberInputConstructorArgs, NumberInputOptions, NumberInputValue } from './api'
 import { count } from './utils'
 
@@ -67,7 +67,7 @@ export class NumberInput {
       this.el.setAttribute('inputmode', 'decimal')
     }
     this.numberFormat = new NumberFormat(this.options)
-    this.numberMask = this.options.autoDecimalDigits ? new AutoDecimalModeNumberMask(this.numberFormat) : new DefaultNumberMask(this.numberFormat)
+    this.numberMask = this.options.autoDecimalDigits ? new AutoDecimalDigitsNumberMask(this.numberFormat) : new DefaultNumberMask(this.numberFormat)
     this.step = options.step && options.step > 0 ? Math.max(options.step, this.toFloat(1)) : this.toFloat(1)
     this.minValue = this.getMinValue()
     this.maxValue = this.getMaxValue()

src/numberMask.ts

@@ -58,7 +58,7 @@ export class DefaultNumberMask extends AbstractNumberMask implements NumberMask
   }
 }
 
-export class AutoDecimalModeNumberMask extends AbstractNumberMask implements NumberMask {
+export class AutoDecimalDigitsNumberMask extends AbstractNumberMask implements NumberMask {
   conformToMask(str: string, previousConformedValue = ''): string | { fractionDigits: string; numberValue: number } {
     if (
       str === '' ||
@@ -71,10 +71,10 @@ export class AutoDecimalModeNumberMask extends AbstractNumberMask implements Num
     const numberValue =
       this.numberFormat.stripMinusSymbol(str) === ''
         ? -0
-        : Number(`${negative ? '-' : ''}${removeLeadingZeros(this.numberFormat.onlyDigits(str))}`) / Math.pow(10, this.numberFormat.minimumFractionDigits)
+        : Number(`${negative ? '-' : ''}${removeLeadingZeros(this.numberFormat.onlyDigits(str))}`) / Math.pow(10, this.numberFormat.maximumFractionDigits)
     return {
       numberValue,
-      fractionDigits: numberValue.toFixed(this.numberFormat.minimumFractionDigits).slice(-this.numberFormat.minimumFractionDigits)
+      fractionDigits: numberValue.toFixed(this.numberFormat.maximumFractionDigits).slice(-this.numberFormat.maximumFractionDigits)
     }
   }
 }

tests/unit/numberMask.spec.ts

@@ -0,0 +1,12 @@
+import { AutoDecimalDigitsNumberMask } from '../../src/numberMask'
+import { NumberFormat } from '../../src/numberFormat'
+import { NumberFormatStyle } from '../../src'
+
+describe('AutoDecimalDigitsNumberMask', () => {
+  it('should use the maximumFractionDigits of the number format', () => {
+    const numberFormat = new NumberFormat({ formatStyle: NumberFormatStyle.Decimal, locale: 'en' })
+    const autoDecimalDigitsNumberMask = new AutoDecimalDigitsNumberMask(numberFormat)
+
+    expect(autoDecimalDigitsNumberMask.conformToMask('1000')).toEqual({ fractionDigits: '000', numberValue: 1 })
+  })
+})