Change Class to a another Class in the CSS part!

Question

In my code https://code.sololearn.com/WBm9TKxKsx7L/#html
I've a big interactivity problem!

I don't want do an animation with JS and I use class in CSS to do the thing!

The problem is the execution when I use a OnClick...HOW CHANGE THE CLASS WITH A ONCLICK ?!

I tried "OnClick="this.class:'SautVertical'" after defined my default class at "Neutre" but...it's not very effective!

I tried to use id and <imput> but it's no help!

I tried to use JQuery... (just a copy-past of this code: https://stackoverflow.com/questions/7014385/javascript-jquery-to-change-class-onclick )

So:

$('.showhide').click(function() {
$(this).removeClass('myclass');
$(this).addClass('showhidenew');
});

...and I lost my power of understandability... SEND HELP!!

Answer 1

:active

Answer 2

onclick=" this.class='Neutre' " like this ?

Answer 3

https://code.sololearn.com/WIbMz417tr3j/?ref=app