Still problems with ternary operators in arrays.

[koskinpark]

twig.js:^1.15.4

{% set classes = [ 'a-button', modifier ? modifier, ] %}

This returns now
{ classes: [ 0: undefined ] }

Normally, if modifier is not exist, we should return only ['a-button']. Or if it's exist -> it should return ['a-button', 'some-modifier-value'], or even ['a-button', ['some-modifier-value-1', 'some-modifier-value-2']]

[koskinpark]

We are trying to simulate drupal's behaviors in twig.js
Example of usage in Drupal https://git.drupalcode.org/project/drupal/-/blob/10.1.x/core/themes/claro/templates/form-element.html.twig#L26

[willrowe]

Can you provide an example of it working as expected in Twigfiddle?

[sarahjean]

@willrowe Here is a twigfiddle example, very simplified version of the Drupal example from @koskinpark : https://twigfiddle.com/caakml

[willrowe]

I did a little bit of testing with this and it appears to be an issue in the parsing of the array. If I break out each of the items into a separate print statement, it seems to work properly.

[dgervalle]

I can confirm @willrowe assessment, this is a very annoying parsing issue. Putting the ternary expression between brackets solve the issue.

Not working:
{% set classes = [ style_name ? 'image-style-' ~ style_name %}

Working:
{% set classes = [ (style_name ? 'image-style-' ~ style_name) ] %}

This is very annoying when simulating existing Drupal templates.