Preventing HTML and Script injections in Javascript

Question

Assume I have a page with an input box. The user types something into the input box and hits a button. The button triggers a function that picks up the value typed into the

Answer 1

A one-liner:

var encodedMsg = $('
').text(message).html();

See it work:

https://jsfiddle.net/TimothyKanski/wnt8o12j/