JSFiddle - React, Tailwind, and code Playground
JavaScript
if(navigator.userAgent.indexOf('Safari') != -1 && navigator.userAgent.indexOf('Chrome') == -1){
var browser = "safari";
}
if(browser === safari){
$("body").addClass('safari');
$(window).scroll(function() {
var scrollPos = $(window).scrollTop();
if(scrollPos > 1){
$('#post').addClass("modify");
} else{
$('#post').removeClass("modify");
}
});
} else{
// insert your code
}