How can you strike through a variable in Javascript?

document.getElementById(wordArray[i]).value = answer[i] + ' ' + wordArray[i];

I want to strike through part answer[i], but not wordArray[i]. How should I go about this? Thanks.

Answer

Strike though a variable sounds weird, do you mean to strike a text (string)? In that case you have text-decoration: line-through; (see more about text-decoration)

If that’s the case you can wrap your variabe into a span tag, i.e.:

'<span class="line-through">' + answer[i] + '</span>

.line-through { text-decoration: line-through }