7 lines
		
	
	
		
			151 B
		
	
	
	
		
			JavaScript
		
	
	
	
	
	
			
		
		
	
	
			7 lines
		
	
	
		
			151 B
		
	
	
	
		
			JavaScript
		
	
	
	
	
	
'use strict';
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export default function parseProtocol(url) {
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  const match = /^([-+\w]{1,25})(:?\/\/|:)/.exec(url);
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  return match && match[1] || '';
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}
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