Vim9script commands from command line result in E1124. Is it normal?

Question

If I run e.g. :var a = 1 from the command line I end up in E1124: "var" cannot be used in legacy vimscript. Running on MacVim 9.0.1276.

Is it normal behavior?

Answer 1

To use the vim9 script syntax your script must include as the first command vim9script.

vim9script

var a = 1

On the command line to run vim9 script command you have to prefix them with :vim9

:vim9 g:a = 1

Answer 2

This is because the commandline runs :legacy-mode by default unless :vim9cmd is used.