I am a novice in Java Script and I have a variable inside a for loop like below:

                myTBody2 += `<tr><td><button class="btn btn-sm btn-primary" onclick="myFetcher('${data._links.first.href}')">First</button></td>
                    <td><button class="btn btn-sm btn-primary" onclick="myFetcher('${data._links.self.href}')">Current</button></td>
                    <td><button class="btn btn-sm btn-primary" onclick="myFetcher('${data._links.next.href}')">Next</button> </td>
                    <td><button class="btn btn-sm btn-primary" onclick="myFetcher('${data._links.last.href}')">Last </button></td></tr>`;

Now, say, if the value of ${data._links.next.href} is undefined or missing, how do I hide it? Is there a java script (vanilla JS) inline (one liner) function available to do that? Any pseudo/pointers/solution will be greatly appreciated.