JSFiddle - React, Tailwind, and code Playground

HTML

<ul id="toto">
    <li>toto</li>
    <li>toto</li>
    <li>toto</li>
</ul>

<ul id="titi">
    <li>titi</li>
    <li>titi</li>
    <li>titi</li>
</ul>

JavaScript

$("#toto").on("mousedown","li",function() {
        console.log("toto");
        $("#toto").on("mousedown",{});
});

$("#titi").on("mousedown","li",function() {
        console.log("titi");
        $("#toto").on("mousedown",{});
});
$("#titi").on("mousedown","li",function() {
        console.log("titi");
        $("#toto").on("mousedown",{});
});
$("#titi").on("mousedown","li",function() {
        console.log("titi");
        $("#toto").on("mousedown",{});
});