x
<html><body><h1>JavaScript Arrays</h1><h2>The concat() Method</h2><p>The concat() method concatenates (joins) two or more arrays:</p><p id="demo"></p><script>const arr1 = ["Cecilie", "Lone"];const arr2 = ["Emil", "Tobias", "Linus"];const arr3 = ["Robin"];const children = arr1.concat(arr2, arr3); document.getElementById("demo").innerHTML = children;</script></body></html>