Is it ok to make a function with both straight js and jquery?

Question

I made a function with both js and jquery, and it works. Im wondering if it is bad ju ju to do such a thing? Is this a coding abomination? It does work.

function myDmgFunc (){
if(hp >= 1){
var charDmg = parseInt(document.getElementById("input1").value);
var dmg = Math.floor((Math.random()*charDmg)+1);
hp = hp - dmg;
dmg = Math.floor((Math.random()*charDmg)+1);
document.getElementById("mnstrHp").innerHTML = hp;
}else{
$("#mnstrHp").html("Monster is dead");
}
}

Answer 1

It will work. and it's totally fine. But obviously, if you will use jQuery, there's no point in using plain js unless it's necessary.