CodePen Embed - Page construction in CSS.

Live

This Pen is owned by Scott Kellum on CodePen.

External CSS

This Pen doesn't use any external CSS resources.

External JavaScript

This Pen doesn't use any external JavaScript resources.

{"__browser":{"country":"US","device":"unknown_device","mobile":false,"name":"unknown browser","platform":"unknown_platform","version":"0"},"__constants":{},"__CPDATA":{"domain_iframe":"https://cdpn.io","environment":"production","host":"codepen.io","iframe_allow":"accelerometer *; ambient-light-sensor *; camera *; display-capture *; encrypted-media *; geolocation *; gyroscope *; microphone *; midi *; payment *; vr *; web-share *; serial *; xr-spatial-tracking *","iframe_sandbox":"allow-downloads allow-forms allow-modals allow-pointer-lock allow-popups-to-escape-sandbox allow-popups allow-presentation allow-same-origin allow-scripts allow-top-navigation-by-user-activation"},"__graphql":{"data":{"errors":[{"message":"Cannot return null for non-nullable field Query.sessionUser"}],"data":null},"url":"https://codepen.io/graphql","api":"cprails"},"__pay_stripe_public_key":"pk_live_2GndomDfiklqpSNQn8FrGuwZSMIMzha7DkLJqlYe7IR0ihKAlKdiHg68JJc5eVPt68rzAjzAAVXcUwjySHRCsgjQQ00gtRBUFNH","__pay_braintree_env":"production","__boomboom":{"serve_url":"https://cdpn.io/cpe/boomboom","store_url":"https://codepen.io/cpe/boomboom/store"},"__pageType":"embed","__item":"{\"editor_settings\":{\"auto_run\":true,\"autocomplete\":false,\"code_folding\":true,\"css_pre_processor\":\"none\",\"css_prefix\":\"neither\",\"css_starter\":\"neither\",\"emmet_active\":true,\"font_size\":14,\"font_type\":\"system\",\"format_on_save\":false,\"html_pre_processor\":\"none\",\"indent_with\":\"spaces\",\"js_pre_processor\":\"none\",\"key_bindings\":\"normal\",\"line_numbers\":true,\"line_wrapping\":true,\"match_brackets\":true,\"snippets\":{\"markupSnippets\":{},\"stylesheetSnippets\":{}},\"tab_size\":2,\"theme\":\"twilight\",\"id\":\"WqwjLm\",\"auto_save\":true},\"hashid\":\"WqwjLm\",\"itemType\":\"pen\",\"resources\":[],\"tags\":[],\"id\":36993127,\"user_id\":467,\"html\":\"\",\"css\":\"body {\\n  font-family: -apple-system,BlinkMacSystemFont,\\\"Segoe UI\\\",Roboto,Oxygen-Sans,Ubuntu,Cantarell,\\\"Helvetica Neue\\\",sans-serif;\\n  \\n  --html:(\\n    <h1>Hello ${data.name}!</h1>\\n    <p>This page was constructed entirely within the CSS file. That includes all the data, markup, scripts, and also styles.</p>\\n    <p>For more information, see the <a href=\\\"https://github.com/scottkellum/CJSS\\\">CJSS</a> repo on Github.</p>\\n    <p>click the items below to toggle them. This is to illustrate component-level JS in the CSS file.</p>\\n    <nav>Nav heading</nav>\\n  );\\n  --data:(\\n    name:'world',\\n  );\\n}\\n\\nnav {\\n  --data:(\\n    links: ['one', 'two', 'three'],\\n  );\\n  --html:(\\n    <h2>${yield}</h2>\\n    <div class=\\\"item\\\">${data.links[0]}</div>\\n    <div class=\\\"item\\\">${data.links[1]}</div>\\n    <div class=\\\"item\\\">${data.links[2]}</div>\\n  );\\n}\\n\\nnav .item {\\n  cursor: pointer;\\n  --js:(\\n    function toggle() {\\n      this.classList.toggle('active');\\n    }\\n    this.addEventListener('click', toggle );\\n  );\\n}\\nnav .item.active {\\n  color: red;\\n}\\n\\n/* Run a script like typetura.js */\\nscript {\\n  --data:(\\n    say: 'Hello world!'\\n  );\\n  --js:(\\n    console.log(data.say);\\n  );\\n}\",\"js\":\"(() => {\\n\\n  /**\\n   * Get value of a rule's property and remove surrounding parentheses.\\n   * @param rule The CSSStyleRule, which to select from.\\n   * @param propertyName The name/key which to select.\\n   **/\\n  function getPureProperty(rule, propertyName) {\\n    const raw = rule.style.getPropertyValue(propertyName);\\n    return raw.trim().slice(1, -1);\\n  }\\n\\n  /**\\n   * Runs CJSS rules - CSS rules with the special properties --html, --js and --data.\\n   * @param rules An array of CJSS rules.\\n   **/\\n  function cjss(rules) {\\n    for (let rule of rules) {\\n      const ruleName = rule.constructor.name;\\n\\n      // Handle imports (recursive)\\n      if (ruleName === 'CSSImportRule') {\\n        const importedRules = rule.styleSheet.cssRules;\\n        cjss(importedRules);\\n      }\\n\\n      else if (ruleName === 'CSSStyleRule') {\\n        const selector = rule.style.parentRule.selectorText;\\n        const elements = document.querySelectorAll(selector);\\n\\n        let js = getPureProperty(rule, '--js');\\n        let html = getPureProperty(rule, '--html');\\n        let data = getPureProperty(rule, '--data');\\n\\n        if (data) {\\n          data = eval(`({ ${ data } })`);\\n        }\\n\\n        if (html) {\\n          for (let element of elements) {\\n            const yield = element.innerHTML;\\n\\n            // eval could be removed with a \\\"shallow parser\\\".\\n            element.innerHTML = eval(`\\\\`${ html }\\\\``);\\n          }\\n        }\\n\\n        if (js) {\\n          if (selector === 'script') {\\n            eval(js);\\n            continue;\\n          }\\n\\n          // There is a lot of room for optimization here.\\n          for (let n = 0; n < elements.length; n++) {\\n            eval(js.replace(/this/g, `document.querySelectorAll('${ selector }')[${ n }]`));\\n          }\\n        }\\n      }\\n    }\\n  }\\n\\n  /**\\n   * Plug every stylesheet in the document into the cjss function.\\n   */\\n  function initialize() {\\n    for (let sheet of document.styleSheets) {\\n      const rules = sheet.rules || sheet.cssRules;\\n\\n      if (!rules || !rules.length) continue;\\n      cjss(rules);\\n    }\\n  }\\n\\n  document.addEventListener('DOMContentLoaded', initialize);\\n})();\",\"html_pre_processor\":\"none\",\"css_pre_processor\":\"none\",\"js_pre_processor\":\"none\",\"html_classes\":\"\",\"css_starter\":\"neither\",\"js_library\":null,\"created_at\":\"2019-06-16T23:06:27.000Z\",\"updated_at\":\"2019-07-18T19:01:05.000Z\",\"title\":\"Page construction in CSS.\",\"description\":\"\",\"slug_hash\":\"WqwjLm\",\"head\":\"\",\"private\":false,\"has_animation\":false,\"team_id\":0,\"css_prefix\":\"neither\",\"template\":false,\"parent_id\":0,\"comments_count\":2,\"custom_screenshot_filename\":null,\"loves_count\":44,\"pick\":false,\"popularity\":999,\"views_count\":7585,\"pick_visible_at\":null,\"cpid\":\"016b628a-b938-7974-adb4-cf0d1396824f\",\"is_new_editor_pen\":false,\"access\":\"Public\",\"pen_hash\":null}","__processorsMap":{"autoprefixer":"autoprefixer-10","babel":"babel-7","coffeescript":"coffeescript-2","format-1":"format-1","flutter":"flutter-1","haml":"haml-4","less":"less-3","lint-1":"lint-1","livescript":"livescript-1","markdown":"markdown-11","postcss":"postcss-7","pug":"pug-2","sass":"sass-1","scss":"sass-1","sass-ruby-3":"sass-ruby-3","sass-ruby-compass-3":"sass-ruby-compass-3","slim":"slim-3","stylus":"stylus-0","typescript":"typescript-4","vue":"vue-2","vue3":"vue-3"},"__favicon_mask_icon":"https://cpwebassets.codepen.io/assets/favicon/logo-pin-b4b4269c16397ad2f0f7a01bcdf513a1994f4c94b8af2f191c09eb0d601762b1.svg","__favicon_shortcut_icon":"https://cpwebassets.codepen.io/assets/favicon/favicon-aec34940fbc1a6e787974dcd360f2c6b63348d4b1f4e06c77743096d55480f33.ico","__path_to_iframe_console_runner":"https://cpwebassets.codepen.io/assets/editor/iframe/iframeConsoleRunner-6d8bf8b4b479137260842506acbb12717dace0823c023e08b96360e60b0840d9.js","__path_to_iframe_refresh_css":"https://cpwebassets.codepen.io/assets/editor/iframe/iframeRefreshCSS-44fe83e49b63affec96918c9af88c0d80b209a862cf87ac46bc933074b8c557d.js","__path_to_iframe_runtime_errors":"https://cpwebassets.codepen.io/assets/editor/iframe/iframeRuntimeErrors-4f205f2c14e769b448bcf477de2938c681660d5038bc464e3700256713ebe261.js","__path_to_processor_worker":"https://cpwebassets.codepen.io/assets/packs/router.js","__path_to_stop_execution_on_timeout":"https://cpwebassets.codepen.io/assets/common/stopExecutionOnTimeout-2c7831bb44f98c1391d6a4ffda0e1fd302503391ca806e7fcc7b9b87197aec26.js","__pen_normalize_css_url":"https://public.codepenassets.com/css/normalize-5.0.0.min.css","__pen_prefix_free_url":"https://public.codepenassets.com/js/prefixfree-1.0.7.min.js","__pen_reset_css_url":"https://public.codepenassets.com/css/reset-2.0.min.css"}