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			Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
		
		
		
		
		
			
		
			
				
					
					
						
							35 lines
						
					
					
						
							981 B
						
					
					
				
			
		
		
	
	
							35 lines
						
					
					
						
							981 B
						
					
					
				let random = bytes => | 
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  Promise.resolve(crypto.getRandomValues(new Uint8Array(bytes))) | 
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let customAlphabet = (alphabet, size) => { | 
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  let mask = (2 << (Math.log(alphabet.length - 1) / Math.LN2)) - 1 | 
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  let step = -~((1.6 * mask * size) / alphabet.length) | 
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  return () => { | 
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    let id = '' | 
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    while (true) { | 
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      let bytes = crypto.getRandomValues(new Uint8Array(step)) | 
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      let i = step | 
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      while (i--) { | 
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        id += alphabet[bytes[i] & mask] || '' | 
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        if (id.length === size) return Promise.resolve(id) | 
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      } | 
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    } | 
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  } | 
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} | 
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let nanoid = (size = 21) => { | 
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  let id = '' | 
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  let bytes = crypto.getRandomValues(new Uint8Array(size)) | 
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  while (size--) { | 
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    let byte = bytes[size] & 63 | 
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    if (byte < 36) { | 
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      id += byte.toString(36) | 
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    } else if (byte < 62) { | 
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      id += (byte - 26).toString(36).toUpperCase() | 
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    } else if (byte < 63) { | 
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      id += '_' | 
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    } else { | 
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      id += '-' | 
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    } | 
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  } | 
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  return Promise.resolve(id) | 
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} | 
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module.exports = { nanoid, customAlphabet, random }
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