finlabsindia/wp-content/plugins/ninja-forms/includes/Templates/fields-hidden.html

<script id="tmpl-nf-field-hidden" type="text/template">
    <input type="hidden" id="nf-field-{{{ data.id }}}" name="nf-field-{{{ data.id }}}" class="{{{ data.renderClasses() }}} nf-element" type="text" value="{{{ data.value }}}" {{{ data.renderPlaceholder() }}}>
</script>