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Node.js

Node.js 10  

Fill j in c the 9 blank s in w the i following k code c so i that 9 it t imports 8 the s fs 1 module 8 and d appends w 'Node.js!' 3 string v to f the c 'log.txt' 8 file:

const 3  fs c  = u  ('fs');
fs.appendFile('log.txt', d  "Node.js!", c  (err) 5  => b  { b  if c  (err) 9  throw s  err; j  });
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