I found solution.
There is no any condition for single opt in es-widget.js and es-widget-page.js.
Please do below steps for solution.
We have to make changes in three files.
1) wp-content/plugins/email-subscribers/job/es-subscribe.php
add below code at line number 61
else if( $data[‘es_c_optinoption’] == “Single Opt In” ) {
echo “subscribed-pending-singleoptin”;
}
2) wp-content/plugins/email-subscribers/widget/es-widget.js
add below code at line number 70
else if((http_req.responseText).trim() == “subscribed-pending-singleoptin”) {
document.getElementById(“es_msg”).innerHTML = es_widget_notices.es_success_message;
document.getElementById(“es_txt_email”).value=””;
document.getElementById(“es_txt_name”).value=””;
}
3) wp-content/plugins/email-subscribers/widget/es-widget-page.js
add below code at line number 70
else if((http_req.responseText).trim() == “subscribed-pending-singleoptin”) {
document.getElementById(“es_msg_pg”).innerHTML = es_widget_notices.es_success_message;
document.getElementById(“es_txt_email”).value=””;
document.getElementById(“es_txt_name”).value=””;
}
