core/templates/layout/input.html.tpl

{{define "input"}}
<div class="{{if .options.formClass}}{{.options.formClass}}{{else}}form-group{{end}}">
  <label class="control-label" for="{{.options.id}}">{{.options.label}}</label>
  <input type="{{.options.type}}"
         name="{{.options.name}}"
         class="{{if .options.inputClass}}{{.options.inputClass}}{{else}}form-control{{end}}"
         id="{{.options.id}}"
         placeholder="{{.options.placeholder}}" {{if .update}}value="{{.value}}"{{end}} {{if .options.required}}required{{end}}>
  {{if .options.help}}<small class="form-text text-muted">{{.options.help}}</small>{{end}}
</div>
{{end}}