Why isn't the pug mixin working?

Question

Pug

block content
    main#main.expanded.row
        +normalPost("Hello world")        
    
    mixin normalPost(post)
        .thumbnail.medium-4.large-3.column= post

It seems to be written normally, but it does not work.

Error:
pug_mixins.normalPost is not a function

Answer 1

You call it before you declare it.