Question

How to join strings with a comma only if strings are not null or empty in TypeScript

Answer 1

const s1 = '';
const s2 = 'typescript';
const s3 = '';
const s4 = '';
const s5 = null;
const s6 = 'java';
const s7 = 'c++';

const s = [s1, s2, s3, s4, s5, s6, s7].filter(Boolean).join(',');

console.log(s); 

  
  
  
  
/*
run:
  
"typescript,java,c++" 
  
*/

 

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