• https://cdn.bootcdn.net/ajax/libs/socket.io/2.0.4/socket.io.js
• https://cdn.bootcdn.net/ajax/libs/socket.io/2.0.4/socket.io.js.map
• https://cdn.bootcdn.net/ajax/libs/socket.io/2.0.4/socket.io.slim.js
• https://cdn.bootcdn.net/ajax/libs/socket.io/2.0.4/socket.io.slim.js.map