Customizing Bibliography using biblatex

Question

I'm struggling with understanding how to change the bibliography in biblatex. The style I'm using is "numeric-comp" which according to my MWE below gives me the following order:

Name, G., “Title of Article no. 1”, 2020 Journal of Something Great 5.1, pp. 21-42

But what I need is to move the date after the authors and also to set the chapter number bold and the journal in italics, so that it looks like:

Name, G., (2020) Title of Article no. 1, Journal of Something Great (5), 21-42

According to here, I have changed the macro for "journal+issuetitle" but I can only move it a different place after the Journal. Could anyone please help me with what I'm missing? Here is the MWE:

\begin{filecontents}{demobib.bib}
@ARTICLE{article1,
  author = {Name, Givenname},
  title = {Title of Article no. 1},
  journal = {Journal of Something Great},
  year = {2020},
  volume = {5},
  number = {1},
  pages = {21-42},
}

@ARTICLE{article2,
  author = {Name, Givenname},
  title = {Title of Article no. 2},
  journal = {Journal of Something Even Greater},
  year = {2021},
  volume = {4},
  number = {2},
  pages = {42-84},
}
\end{filecontents}


\documentclass[english]{scrartcl}

\usepackage[latin1]{inputenc}
\usepackage[T1]{fontenc}

\usepackage{babel}
\usepackage[babel]{csquotes}

\usepackage[backend=biber, style=numeric-comp, giveninits=true, maxnames = 3, bibencoding=utf8, sorting=none]{biblatex}
\renewcommand*{\newunitpunct}{\addcomma\space}
\renewbibmacro{in:}{}

\bibliography{demobib}

\renewbibmacro*{journal+issuetitle}{%
 \usebibmacro{date}
\setunit{\addspace}
  \usebibmacro{journal}%
  \setunit*{\addspace}%
  \iffieldundef{series}
    {}
    {\newunit
     \printfield{series}%
     \setunit{\addspace}}%
  \usebibmacro{volume+number+eid}%
%  \setunit{\addspace}% DELETED
 %\setunit{\addcolon\space}% DELETED
%  \usebibmacro{issue}% DELETED
  \newunit}

\DeclareNameAlias{author}{last-first}
\DeclareNameAlias{sortname}{last-first}


\begin{document}

\parencite{article1}

\parencite{article2}

\printbibliography

\end{document}
´´´

Answer 1

The classical trick to make your numeric bibliography look more author-year-y is shown in Combining style numeric with style authoryear in BibLaTeX.

For the "in:" I recommend one of the solutions from Suppress "In:" biblatex (I picked the biblatex-ext solution).

In order to reformat the output of the volume and pages fields, you can use \DeclareFieldFormat (see amongst others Guidelines for customizing biblatex styles). To get rid of number use a Biber sourcemap (Disable ISSN but keep ISBN with biblatex).

\documentclass[english]{scrartcl}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{babel}
\usepackage[babel]{csquotes}

\usepackage[
  backend=biber,
  citestyle=ext-numeric-comp,
  bibstyle=ext-authoryear,
  sorting=none,
  giveninits=true,
  maxnames = 3,
  articlein=false,
]{biblatex}

\makeatletter
\input{ext-numeric.bbx}
\makeatother

\renewcommand*{\newunitpunct}{\addcomma\space}

\DeclareNameAlias{sortname}{family-given}

\DeclareNameAlias{author}{sortname}
\DeclareNameAlias{editor}{sortname}
\DeclareNameAlias{translator}{sortname}


\DeclareFieldFormat[article,periodical]{volume}{\mkbibbold{\mkbibparens{#1}}}
\DeclareFieldFormat[article,periodical]{pages}{#1}

\DeclareSourcemap{
  \maps{
    \map{
      \pertype{article}
      \pertype{periodcial}
      \step[fieldset=number, null]
    }
  }
}

\addbibresource{biblatex-examples.bib}

\begin{document}
\autocite{sigfridsson,worman,geer}

\printbibliography
\end{document}

Note that I switched from \usepackage[latin1]{inputenc} to \usepackage[utf8]{inputenc} in the MWE. The latter is already the default, so strictly speaking need not be included any more. UTF-8 is the de facto standard encoding nowadays and some of biblatex's features work best with UTF-8 (instead of Latin1).