Numbering heading using #show - Typst

When I started using the show method in Typst, I lost the heading numbering. How can i get it back?

#show heading: it => [
    #block(fill:white, outset: 5pt, radius: 20%, 
    underline(stroke: rgb(39, 174, 96) + 1.5pt, offset: 1.75pt)[#it.body])
]

Your show function uses it.body, so only the heading text (body) is showing. You can fix this by displaying it instead of it.body, which contains information about the numbering:

#set heading(numbering: "1.")
#show heading: it => [
    #block(fill:white, outset: 5pt, radius: 20%, 
    underline(stroke: rgb(39, 174, 96) + 1.5pt, offset: 1.75pt)[#it])
]

= Heading

If you want to also underline the whitespace between the number and heading, you can explicitly display the heading number and body separately:

#set heading(numbering: "1.")
#show heading: it => [
  #block(
    fill: white,
    outset: 5pt,
    radius: 20%,
    underline(stroke: rgb(39, 174, 96) + 1.5pt, offset: 1.75pt)[
      #counter(heading).display() #it.body
    ],
  )
]

= Heading