JSFiddle - React, Tailwind, and code Playground
JavaScript
$(document).ready(function() {
var inDesignMode = document.forms[MSOWebPartPageFormName].MSOLayout_InDesignMode.value;
if (inDesignMode == "1") {
console.log("EDIT MODE");
$("body").addClass("edit-mode");
} else {
console.log("BROWSE MODE");
$("body").addClass("browse-mode");
}
});