JSFiddle - React, Tailwind, and code Playground

HTML

<div class="week" id="week_2">Week 2</div>
<div class="week" id="week_5">Week 5</div>
<div class="week" id="week_11">Week 11</div>

JavaScript

$(function(){
var today = new Date(); 
var weekno = 10;
    $(".week").each(function() {
        n = $(this).attr("id").split("_")[1];
        if(n < weekno) {
            $(this).hide();
        }
    });
});