14 lines
		
	
	
		
			307 B
		
	
	
	
		
			TypeScript
		
	
	
	
	
	
			
		
		
	
	
			14 lines
		
	
	
		
			307 B
		
	
	
	
		
			TypeScript
		
	
	
	
	
	
export function capitalize(s: string): string {
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  return s.substring(0, 1).toUpperCase() + s.substring(1)
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}
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export function classNames(
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  displayClass?: "mobile-only" | "desktop-only",
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  ...classes: string[]
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): string {
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  if (displayClass) {
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    classes.push(displayClass)
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  }
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  return classes.join(" ")
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}
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