@ng-doc/builder/scripts/restore-theme.js

<!-- PROJECT LOGO --> <br /> <div align="center"> <a href="https://github.com/ng-doc/ng-doc"> <img src="https://ng-doc.com/assets/images/ng-doc.svg?raw=true" alt="Logo" height="150px"> </a>

const themeId = localStorage.getItem('ng-doc-theme-id');

if (themeId) {
  const documentElement = document.documentElement;
  documentElement.setAttribute('data-theme', themeId);
}