move optional page argument after title

Question

When citing a page with an electronic entry the page number should be behind the title of the website. With a normal website this may not make that much sense but with a pdf from a website it does.

\RequirePackage{filecontents}
\begin{filecontents*}{\jobname.bib}

@Electronic{wade,
  title     = {Darwin, Ahead of His Time, Is Still Influential},
  author    = {Nicholas Wade},
  date       = {2009-02-09},
  url       = {https://www.nytimes.com/2009/02/10/science/10evolution.html?ref=sciencespecial2},
  urldate   = {2018-10-08},
  }


\end{filecontents*}


\documentclass{article}

\usepackage[style=verbose, autocite=footnote]{biblatex}
\addbibresource{\jobname.bib}
\DeclareFieldFormat[online, article]{title}{\mkbibquote{#1\isdot}}
\begin{document}
Lorem ipsum   \autocite[p. 42]{wade}

\printbibliography
\end{document}

How can I do that?

Answer 1

You are already heavily modifying the bibliography driver for @online (compare Customize second citation for books, articles, incollection with code from amongst others Move date before title in bibliography using biblatex, Biblatex move organization), so like Henri Menke in his answer I will modify the driver directly. In case the bibliography driver is not being changed that much, one could inject the \usebibmacro{bib:postnote} into the title bibmacro or patch the driver with xpatch to keep the code shorter.

Printing the postnote in the bibliography driver is the easy bit, suppressing the postnote at the end if it has been printed before is trickier. Luckily the verbose citation styles know an option called citepages. That option is intended to control the appearance of page postnotes in full citations where the pages field is also present. See the verbose style documentation for an explanation with examples. It is possible to make use of the infrastructure for that option to avoid printing the postnote twice in this case as well. (Note that the implementation below therefore relies on a citation style of the verbose family. If you wanted to do the same for say, \fullcite or a different style, things would be a bit more involved. Though you would probably just copy the citepages infrastructure from verbose.cbx and simplify it a bit.)

\documentclass{article}
\usepackage[style=verbose, autocite=footnote]{biblatex}

% modelled after the citepages option of the verbose family
\newtoggle{cbx:suppresspostnote}
\renewbibmacro*{cite:citepages}{%
  \global\togglefalse{cbx:suppresspostnote}}%
\renewbibmacro*{cite:full:citepages}{%
  \global\togglefalse{cbx:suppresspostnote}}%
\renewbibmacro*{cite:postnote}{%
  \iftoggle{cbx:suppresspostnote}
    {}
    {\usebibmacro{postnote}}}

% usually I don't like to start bibmacros with punctuation
% but in this case I thought it would work nicer that way
\newbibmacro{bib:postnote}{%
  \ifnumequal{\value{citecount}}{\value{citetotal}}
    {\setunit{\postnotedelim}%
     \printfield{postnote}%
     \global\toggletrue{cbx:suppresspostnote}}
    {}%
}

%%%%% https://tex.stackexchange.com/q/464205/35864,
%%%%% https://tex.stackexchange.com/q/464166/35864
\DeclareFieldFormat[online]{title}{\mkbibquote{#1\isdot}}

\DefineBibliographyStrings{english}{
  urlseen = {visited at}
}

\DeclareFieldFormat{urldate}{\bibstring{urlseen}\space#1}

\DeclareListWrapperFormat{organization}{\mkbibemph{#1}}

\DeclareBibliographyDriver{online}{%
  \usebibmacro{bibindex}%
  \usebibmacro{begentry}%
  \usebibmacro{author/editor+others/translator+others}%
  \newunit\newblock
  \printlist{organization}%
  \newunit\newblock
  \usebibmacro{date}%
  \newunit\newblock
  \usebibmacro{title}%
  \usebibmacro{bib:postnote}%
  \newunit
  \printlist{language}%
  \newunit\newblock
  \usebibmacro{byauthor}%
  \newunit\newblock
  \usebibmacro{byeditor+others}%
  \newunit\newblock
  \printfield{version}%
  \newunit
  \printfield{note}%
  \newunit\newblock
  \iftoggle{bbx:eprint}
    {\usebibmacro{eprint}}
    {}%
  \newunit\newblock
  \usebibmacro{url+urldate}%
  \newunit\newblock
  \usebibmacro{addendum+pubstate}%
  \setunit{\bibpagerefpunct}\newblock
  \usebibmacro{pageref}%
  \newunit\newblock
  \iftoggle{bbx:related}
    {\usebibmacro{related:init}%
     \usebibmacro{related}}
    {}%
  \usebibmacro{finentry}}
%%%% 464205 & 464166 END

\usepackage{filecontents}
\begin{filecontents*}{\jobname.bib}
@online{wade,
  title     = {Darwin, Ahead of His Time, Is Still Influential},
  author    = {Nicholas Wade},
  date      = {2009-02-09},
  url       = {https://www.nytimes.com/2009/02/10/science/10evolution.html},
  urldate   = {2018-10-08},
}
\end{filecontents*}
\addbibresource{\jobname.bib}
\addbibresource{biblatex-examples.bib}

\begin{document}
Lorem ipsum\autocite[42]{wade}

Lorem ipsum\autocite[380]{sigfridsson}

Lorem ipsum\autocite[43]{wade}

\printbibliography
\end{document}

Note that since this answer uses the already modified @online driver from the questions and answers linked above, the output is slightly different from the one shown in the question.

Answer 2

You have to hack deep into the bibliography driver to accomplish this.

% arara: pdflatex
% arara: biber
% arara: pdflatex
% arara: pdflatex
\RequirePackage{filecontents}
\begin{filecontents*}{\jobname.bib}

@Electronic{wade,
  title     = {Darwin, Ahead of His Time, Is Still Influential},
  author    = {Nicholas Wade},
  date       = {2009-02-09},
  url       = {https://www.nytimes.com/2009/02/10/science/10evolution.html?ref=sciencespecial2},
  urldate   = {2018-10-08},
  }


\end{filecontents*}

\documentclass{article}

\usepackage[style=verbose, autocite=footnote]{biblatex}
\addbibresource{\jobname.bib}
\DeclareFieldFormat[online, article]{title}{\mkbibquote{#1\isdot}}

\DeclareBibliographyDriver{online}{%
  \usebibmacro{bibindex}%
  \usebibmacro{begentry}%
  \usebibmacro{author/editor+others/translator+others}%
  \setunit{\printdelim{nametitledelim}}\newblock
  \usebibmacro{title}%
  \newunit              % <--- NEW!
  \usebibmacro{postnote}% <--- NEW!
  \newunit
  \printlist{language}%
  \newunit\newblock
  \usebibmacro{byauthor}%
  \newunit\newblock
  \usebibmacro{byeditor+others}%
  \newunit\newblock
  \printfield{version}%
  \newunit
  \printfield{note}%
  \newunit\newblock
  \printlist{organization}%
  \newunit\newblock
  \usebibmacro{date}%
  \newunit\newblock
  \iftoggle{bbx:eprint}
    {\usebibmacro{eprint}}
    {}%
  \newunit\newblock
  \usebibmacro{url+urldate}%
  \newunit\newblock
  \usebibmacro{addendum+pubstate}%
  \setunit{\bibpagerefpunct}\newblock
  \usebibmacro{pageref}%
  \newunit\newblock
  \iftoggle{bbx:related}
    {\usebibmacro{related:init}%
     \usebibmacro{related}}
    {}%
  \usebibmacro{finentry}}

\DeclareCiteCommand{\smartcite}[\iffootnote\mkbibparens\mkbibfootnote]
  {\usebibmacro{prenote}}
  {\usebibmacro{citeindex}%
   \usebibmacro{cite}}
  {\multicitedelim}
  {}%{\usebibmacro{cite:postnote}} % <-- NEW!

\begin{document}
Lorem ipsum \autocite[p. 42]{wade}

\printbibliography
\end{document}