Avoid IE11 popup POST bugs

IE11 can't post form data to popup window. related issues

You can avoid this problem with tui-code-snippet popup module. please check this demo (demo/postBridge)

How to execute the demo

1. install node dependency modules in project root

npm i

1. execute demo server

node demo/postBridge/server.js

1. connect demo page by several browsers

http://localhost:3000/popup.html

You can see the popup open and receive posted data properly.