style
Provides access to active styles.
The styles are currently opaque and only useful in combination with the
measure function. See its documentation for more details. In
the future, the provided styles might also be directly accessed to look up
styles defined by set rules.
#let thing(body) = style(styles => {
let size = measure(body, styles)
[Width of "#body" is #size.width]
})
#thing[Hey] \
#thing[Welcome]
参数参数参数是传给函数的输入，写在函数名后的括号中。
参数
参数是传给函数的输入，写在函数名后的括号中。
func
A function to call with the styles. Its return value is displayed in the document.
This function is called once for each time the content returned by
style appears in the document. That makes it possible to generate
content that depends on the style context it appears in.