Home / Javascript Tips Generated By ChatGPT / Using Array.concat() to Merge Arrays in Javascript Merge two or more arrays. Source Code let arr1 = [1, 2, 3]; let arr2 = [4, 5, 6]; let mergedArr = arr1.concat(arr2); console.log(mergedArr); // [1, 2, 3, 4, 5, 6]