Is ≤ legal less equal to char?

Question

I read the release notes for Visual Studio Code, and it especially caught my attention.

As you can see, there is a javascript file with symbol ≤. I can’t understand how this works, if I try to use it in my code, I get the error “Invalid or unexpected token” (which I expected), and I can’t find if it only compresses the VSCode configuration <= to ≤ for aesthetic purposes.

How it works?

Answer 1

This is only due to font ligature. Actual characters: 2: <=but the ligature displays them as one.

, Fira Code , , IDE, .

Answer 2

, <= .

:

• https://github.com/tonsky/FiraCode
• https://github.com/i-tu/Hasklig
• https://github.com/be5invis/Iosevka

Answer 3

Ligatures . , FiraCode, . -

---

Hasklig

LOT-, VS-.

Answer 4

, , VSC :

• ( Monoid/Iosevka/Fira)
• editor.fontFamily ,
• editor.fontLigaturesset to true.