How to make lines like this for textarea using css?

Question

css

And that in ie it is normally displayed.

Answer 1

I did not have time :) JRK_DV said correctly. You can also use an image: https://codepen.io/anon/pen/NYvYmo
(commented out in JS where I took base64 from)

Answer 2

Here is an option, but it needs to be finalized: https://codepen.io/topicstarter/pen/OvjEPV

Answer 3

You can linear gradient in em (+ prefixes): https://codepen.io/Odisseya/pen/xWLzbJ

Answer 4

border-bottom