I have the following codes below:
... [Multiple lines ommited for brevity]
Solution 1:
You are selecting the tr element and not the first td that you really want. Try this:
const td = document.querySelector('.bibItemsEntry td:first-child');
const p = document.getElementById('demo');
p.innerHTML = td.textContent;
Solution 2:
const x = document.getElementsByClassName("bibItemsEntry")[0].firstElementChild.innerHTML;
const p = document.getElementById('demo');
p.innerHTML = td.textContent;
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