How to judge the specific function call?

[j10ccc]

I have a function to render some content, and want to judge the first function call.

I try to implement it by getting integer value from counter instance, but there is no related api?

#let render_counter = counter("render")

#let render(body, title: "") = [
  #render_counter.step()

  // FIXME: how to get integer or another way to judge the condition
  #if render_counter.display() == 1 [

  ] else [

  ]
]

[Dherse]

You need to use the at method on counter. Inside of a locate block. This is all covered in the documentation in the time travel section.

[Dherse]

To give an example:

#let render_counter = counter("render")

#let render(body, title: "") = locate(loc => {
  render_counter.step()

  // FIXME: how to get integer or another way to judge the condition
  if render_counter.at(loc) == 1 [

  ] else [

  ]
})

[laurmaedje]

Note that this will not respect the step because loc is before the step. The step should probably be generated outside of locate.

[Dherse]

Yes, I meant to mention it, but I was not sure what was @j10ccc's intension

[j10ccc]

OK, I've referred @Dherse example. I just want to specially render the first component.

I modify your example a little of the if statement and achieve my goals.

render_counter.step()
if render_counter.at(loc).at(0) == 0 [
  this is the first paragraph.
] else [
  this is not the first paragraph.
]

Before starting the discussion, I have read the time travel section. To be honest, it's a little obscure.