How to select symbo √ in math sqrt root?

Questions
,
1

image
image257×145 3.48 KB

#show "√": it => {
  set text(red)
  it
}
$√123$
2

Since the function Roots Functions – Typst Documentation can not be targeted by a show rule, you have to write a custom square root function.

The example below wraps everything in red text and then overrides the text color of the body back to black. This also works with a body that is already colored since Typst always uses the first color that is applied.

#let rsqrt(body) = text(red, $sqrt(#text(black, $body$))$)

$rsqrt(a^2) + rsqrt(a^2 + b^2) + rsqrt(#text(blue, $c$) + d)$
1 Like
3

Note that if/when Support multiple fonts in math by mkorje · Pull Request #6365 · typst/typst · GitHub is merged, the show rule above will work :)

1 Like
4

If you want to color a full equation, setting text.fill in a context might be better.

#let rsqrt(body) = context text(red, math.sqrt(text(text.fill, body)))

#text(purple, $rsqrt(#text(blue, $c$) + d)$)

图片
图片492×604 31.3 KB

Full code 
= Previous
#[
  #let rsqrt(body) = text(red, $sqrt(#text(black, $body$))$)
  #text(purple, $rsqrt(#text(blue, $c$) + d)$)
]

= New

#[
  #let rsqrt(body) = context text(red, math.sqrt(text(text.fill, body)))
  #text(purple, $rsqrt(#text(blue, $c$) + d)$)
]
5

The rsqrt can be just named sqrt, since a global sqrt show rule is implied.