foundry/Data/modules/combat-utility-belt/templates/trigger-select.html

<div class="form-group">
    <label>Trigger</label>
    <select name="flags.combat-utility-belt.macroTrigger" title="Trigger to execute Macro">
        {{#select flag}}
        <option value="">--No Trigger Set--</option>
        {{#each triggers}}
            <option value="{{this.id}}">{{this.text}}</option>
        {{/each}}
        {{/select}}
    </select>
</div>