S/O 72692992

by ajmeese7

HTML

<div>
  <del>All the text to be marked through here</del>
  <br />
  <del>Additional text to be marked through here</del>
</div>

CSS

del {
  text-decoration: none;
}

del span {
  text-decoration: line-through;
}

JavaScript

const elements = document.querySelectorAll("del");
for (let i = 0; i < elements.length; i++) {
	const elem = elements[i];
  const words = elem.innerText.split(" ");
  const spans = words.map((word) => {
  	const span = document.createElement("span");
    span.innerText = word;
    return span;
  });
  
  elem.innerHTML = "";
  spans.forEach((span) => {
  	elem.appendChild(span);
    elem.innerHTML += "&nbsp;";
  });
}