markdown-view-switcher.js
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'use strict'; window.addEventListener('DOMContentLoaded', () => { const CHECKBOX_QUERY = '#markdown-view-switcher > input[type="checkbox"]'; const BLOB_BODY_QUERY = '.blob-body'; const HIDDEN_CLASS = 'hidden'; const document = window.document; const markdownViewEnabledCheckbox = document.querySelector(CHECKBOX_QUERY); const blobBody = document.querySelector(BLOB_BODY_QUERY); // If the checkbox doesn't exist, we're not on a page with a rendered view, so we're done if (!markdownViewEnabledCheckbox) { return; } markdownViewEnabledCheckbox.addEventListener('change', () => { for (const section of blobBody.children) { section.classList.toggle(HIDDEN_CLASS); } }); });