Coding Challenge: Showing a Node's Child

Problem statement

Your mission here is to create a showChild() function that shows one of the children of a DOM element node. This function takes as a parameter the parent node and the child node index. Error cases like a non-element node or an out-of-limits index must be taken into account.

Note: You can fetch all children of a node by using node.children where node is a DOM object.

Coding exercise

Complete the following program to obtain the expected results. The associated HTML code is given in the HTML tab.

Note: Before testing your code, please run the code by pressing RUN button. Then, you can click TEST button. Otherwise, the test cases won’t pass even if the code is correct.