foundry-sw5e/templates/apps/trait-selector.html

<form autocomplete="off" onsubmit="event.preventDefault();">

    {{#*inline "traitList"}}
        <ol class="trait-list">
            {{#each choices as |choice key|}}
                <li>
                    <label class="checkbox">
                        <input type="checkbox" name="{{key}}" data-dtype="Boolean" {{checked choice.chosen}}>
                        {{choice.label}}
                    </label>
                    {{#if choice.children}}
                        {{> traitList choices=choice.children}}
                    {{/if}}
                </li>
            {{/each}}
        </ol>
    {{/inline}}

    {{> traitList}}
    {{#if allowCustom}}
        <div class="form-group stacked">
            <label>{{ localize "SW5E.TraitSelectorSpecial" }}</label>
            <input type="text" name="custom" value="{{custom}}" data-dtype="String"/>
        </div>
    {{/if}}
    <button type="submit" name="submit" value="1"><i class="far fa-save"></i> {{ localize "SW5E.TraitSave"}}</button>
</form>