5 lines
		
	
	
	
		
			242 B
		
	
	
	
		
			JavaScript
		
	
	
	
	
	
			
		
		
	
	
			5 lines
		
	
	
	
		
			242 B
		
	
	
	
		
			JavaScript
		
	
	
	
	
	
| //  This function returns the new value unless it is `null` or
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| //  `undefined`, in which case it returns the old one.
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| export function overwrite (oldVal, newVal) {
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|   return newVal === null || typeof newVal === 'undefined' ? oldVal : newVal;
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| }
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