forgejo/templates/repo/issue/fields/input.tmpl

<div class="field {{if not .item.VisibleOnForm}}gt-hidden{{end}}">
	{{template "repo/issue/fields/header" .}}
	<input type="{{if .item.Validations.is_number}}number{{else}}text{{end}}" name="form-field-{{.item.ID}}" placeholder="{{.item.Attributes.placeholder}}" value="{{.item.Attributes.value}}" {{if .item.Validations.required}}required{{end}} {{if .item.Validations.regex}}pattern="{{.item.Validations.regex}}" title="{{.item.Validations.regex}}"{{end}}>
</div>