javascript appendchild at index
parentElement.insertBefore(newElement, parentElement.children[2]);javascript appendchild at index
parentElement.insertBefore(newElement, parentElement.children[2]);add new element by index js
const arr = [ 1, 2, 3, 4 ];
arr[5] = 'Hello, world!';
console.log(arr); // [ 1, 2, 3, 4, <1 empty item>, 'Hello, world!' ]
console.log(arr.length); // 6Copyright © 2021 Codeinu
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