Headers
hydra: Contextual headers
We have discussed in Typst Basics how to get current heading with query(selector(heading).before(here())) for headers. However, this works badly for nested headings with numbering and similar things. For these cases there is hydra:
#import "@preview/hydra:0.6.1": hydra
#set page(height: 10 * 20pt, margin: (y: 4em), numbering: "1", header: context {
if calc.odd(here().page()) {
align(right, emph(hydra(1)))
} else {
align(left, emph(hydra(2)))
}
line(length: 100%)
})
#set heading(numbering: "1.1")
#show heading.where(level: 1): it => pagebreak(weak: true) + it
= Introduction
#lorem(50)
= Content
== First Section
#lorem(50)
== Second Section
#lorem(100)
