Differenziare le icone scudo di Admin e Moderatore

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@Turtle

Quindi quale sarebbe il CSS, allora? Se volessi cambiare l’icona dell’amministratore in hat-wizard?

Lo stesso CSS.
La classe sarà ancora d-icon-shield-halved indipendentemente dall’icona che hai sostituito, se utilizzi questo metodo di sostituzione:

Replace Discourse's default SVG icons with custom icons in a theme

You can replace a Discourse’s default SVG icons individually or as a whole with your own custom SVG and override them within a theme or theme component. Step 1 - Create an SVG Spritesheet To get started, you must create an SVG Spritesheet. This can contain anything from a single additional custom SVG icon up to an entire replacement set of hundreds. The spritesheet should be saved as an SVG file. In principle, you are nesting the <svg> tag contents from the original SVG icon file into <symbol> …