foundryvtt-reve-de-dragon/templates/partial-roll-diffLibre.html

<div class="flexrow">
  <label for="diffLibre">Difficulté choisie</label>
  <select name="diffLibre" data-dtype="number" {{#unless use.libre}}disabled{{/unless}}>
    {{#select diffLibre}}
    {{#each difficultesLibres as |key|}}
    <option value={{key}}>{{numberFormat key decimals=0 sign=true}}</option>
    {{/each}}
    {{/select}}
  </select>
</div>