Question

How to join (merge) three arrays in JavaScript

Answer 1

const arr1 = ["javascript", "php", "c++", "python"];
const arr2 = ["css", "html", "bootstrap"];
const arr3 = ["c", "c#"];

const arr1arr2arr3 = [...arr1, ...arr2, ...arr3]
 
console.log(arr1arr2arr3);
 
  
  
/*
run:
        
["javascript", "php", "c++", "python", "css", "html", "bootstrap", "c", "c#"]
      
*/

 

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Answer 2

const arr1 = ["javascript", "php", "c++", "python"];
const arr2 = ["css", "html", "bootstrap"];
const arr3 = ["c", "c#"];

const arr1arr2arr3 = arr1.concat(arr2).concat(arr3)
 
console.log(arr1arr2arr3);
 
  
  
/*
run:
        
["javascript", "php", "c++", "python", "css", "html", "bootstrap", "c", "c#"]
      
*/

 

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