Bibtex: how can I make the journals, books, etc titles italic using elsearticle-harv?

Question

Is it possible to make the same change as in Bibtex - Make Title italic, Rest Upright for elsearticle-harv.bst?

I've made the changes in the .bst file, used the TDS tree.

It worked for alpha.bst, it just won't work for elsarticle-harv.

Here are the changes I made:

FUNCTION {format.title}
{ title empty$
    { "" }
    { title emphasize "t" change.case$ }
  if$
}

FUNCTION {article}
{ output.bibitem
  format.authors "author" output.check
  author format.key output
  format.date "year" output.check
  date.block
  format.title "title" output.check
  new.sentence
  crossref missing$
{ journal "journal" output.check
format.date "year" output.check
before.all 'output.state :=
format.vol.num.pages output
}

{ format.article.crossref output.nonnull
  format.pages output
}
  if$
  format.journal.pages
  format.note output
  fin.entry
  write.url
}

I could really use some help on this matter.

Answer 1

1. Copy elsarticle-harv.bst to the directory where your document is and rename it to elsarticle-harv-alt.bst. Do not edit the original file directly because an update could overwrite it.

2. Edit elsarticle-harv-alt.bst.

   Change format.title, similar to what your showed in your question

   FUNCTION {format.title}
   { title empty$
       { "" }
       { title emphtitle "t" change.case$
       }
     if$
   }
   

   Add the function emphtitle (I added it above emphasize).

   FUNCTION {emphtitle}
   { duplicate$ empty$
       { pop$ "" }
       { "{\em " swap$ * "}" * }
     if$
   }
   

   If you are lazy, get the edited file directly from GitHub Gist.

3. Use the new bibliography style.

   \begin{filecontents}{\jobname.bib}
   @article{srt,
     title={Zur Elektrodynamik bewegter K{\"o}rper},
     author={Einstein, Albert},
     journal={Annalen der Physik},
     volume={322},
     number={10},
     pages={891--921},
     year={1905},
     publisher={Wiley Online Library}
   }
   \end{filecontents}
   
   \documentclass{elsarticle}
   \begin{document}
   
   \nocite{*}
   
   \bibliographystyle{elsarticle-harv-alt}
   \bibliography{\jobname}
   
   \end{document}
   

4. ???

5. Profit