jekyll-theme-chirpy/assets/js/dist/toc.min.js

$(function(){if($("#post-wrap .post-content h1").length==0&&$("#post-wrap .post-content h2").length==0&&$("#post-wrap .post-content h3").length==0&&$("#post-wrap .post-content h4").length==0&&$("#post-wrap .post-content h5").length==0){$("#toc-wrap").addClass("hidden")}});