As you say, HTML + javascript. I would recommend you using at least jQuery as you can get and modify HTML elements easily but you can go with just HTML + css + js (it’s slightly harder).
With jQuery you can listen to page events, like click
.
$(document).on("click", function() {
// Change text attributes. For example if you
// have <p id="name">John Doe</p>, you can
// change attributes like that:
$("#name").css("font-family", "comicsans or something");
})
For the mouse move take a look at mousemove event.
You will ran into a lot of problems and I recommend you being patient taking into account you are learning from those mistakes.
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solved First Web Application and Just need to know the First Step [closed]