closes #1807 - e2e tests now also cover the tax calculator. - Dart app updated to match TS (it had no sales tax calculator). - TS sample source cleanup (e.g. removed many unnecessary `docregions`). - Prose updated to include @kwalrath's revisions from a while ago, Ward's comments, and some of my edits as well. Contributes to #1598 and #1508.
		
			
				
	
	
		
			15 lines
		
	
	
		
			381 B
		
	
	
	
		
			TypeScript
		
	
	
	
	
	
			
		
		
	
	
			15 lines
		
	
	
		
			381 B
		
	
	
	
		
			TypeScript
		
	
	
	
	
	
| import { Injectable } from '@angular/core';
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| 
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| import { TaxRateService } from './tax-rate.service';
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| 
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| @Injectable()
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| export class SalesTaxService {
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|   constructor(private rateService: TaxRateService) { }
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| 
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|   getVAT(value: string | number) {
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|     let amount = (typeof value === 'string') ?
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|       parseFloat(value) : value;
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|     return (amount || 0) * this.rateService.getRate('VAT');
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|   }
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| }
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