Question

How to add key value pair to map in JavaScript

Answer 1

const mp = new Map([
  ['JavaScript', 4],
  ['TypeScript', 3],
  ['Node.js', 2],
]);
    
console.log([...mp.entries()]);
   
mp.set('c++', 6);
    
console.log([...mp.entries()]);


    
    
/*
run:
    
[["JavaScript", 4], ["TypeScript", 3], ["Node.js", 2]]
[["JavaScript", 4], ["TypeScript", 3], ["Node.js", 2], ["c++", 6]]
    
*/

 

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