Webflow

Install the Coframe SDK in a Webflow site via Custom Code

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This guide is for sites hosted and managed on Webflow. Webflow provides a Custom Code panel that lets you inject HTML into the <head> of every page on your site, which is exactly where the Coframe installation script needs to go.

If your site is not on Webflow, see the JavaScript guide for general HTML-based installation.

Watch: 65s — pasting into Site settings → Custom code, publishing, and verifying in DevTools
On this page
  1. 01Webflow steps
  2. 02Installation script
  3. 03Verify it is working
  4. 04Optional configuration

01Webflow steps

  1. In your Webflow project, open ⚙️ Site settings from the left-hand navigation or the dashboard.
  2. Go to the Custom code tab.
  3. Find the Head Code section and paste the installation script (see below) into the text area.
  4. Click Save Changes.
  5. Publish your site. The script will not be active for visitors until the site is published.

The script must be added directly in Webflow’s Custom Code panel — do not load it through an async tag manager such as Google Tag Manager. Because anti-flicker is enabled, the script needs to run synchronously before the browser renders the page body.

Configure your installation

Set your project ID and options in the editor. Then follow the steps below using the updated code.

Installation editor

Configure once. Every code snippet in the guide updates with your settings.

Use your public project ID, or replace the placeholder before publishing.
Site settings · Head Code

Use this in Site settings · Head Code. Follow the placement instructions in this guide.

HTML · generated from your settings
<script id='coframe-installation-script'>
  (function () {
    // Early exit for performance testing
    if (/cf_disable/.test(location.search)) return console.warn('[Coframe] Disabled via URL parameter');
  
    // Coframe config
    const config = {
      projectId: 'YOUR_PROJECT_ID',
      startTime: Date.now(),
      timeoutMs: 1000,
      currentUrl: window.location.href,
    };
  
    // Prevent duplicate installation
    const script_id = 'coframe-sdk-js';
    if (document.getElementById(script_id)) return console.warn('[Coframe] SDK already installed');
  
    // Coframe queue setup
    (window.CFQ = window.CFQ || []).push({ config });
  
    // Coframe antiflicker CSS
    const style = document.createElement('style');
    style.id = 'coframe-antiflicker';
    style.textContent =
      ':root { --cf-show: 0;}' +
      'body { opacity: var(--cf-show) !important; transition: opacity 0.2s ease; }'
    function hide() { document.head.appendChild(style); }
    function show() {
      document.documentElement.style.setProperty('--cf-show', '1');
      style.parentNode && style.parentNode.removeChild(style);
    }
    hide(); setTimeout(show, config.timeoutMs);
  
    // Coframe SDK JS
    var edgeUrl = new URL('https://edge.cofra.me/cf.js');
    edgeUrl.searchParams.set('config', encodeURIComponent(JSON.stringify(config)));
  
    const script = document.createElement('script');
    script.id = script_id;
    script.async = true;
    script.src = edgeUrl.toString();
    script.onerror = () => { show(); console.error('[Coframe] SDK failed to load'); };
    document.head.appendChild(script);
  })();
</script>
1 script · 0 companions
Configuration1 on
Antiflicker mode

02Installation script

Copy the script below and paste it into the Head Code section of your Webflow Site settings. Replace YOUR_PROJECT_ID with the project ID from your Coframe dashboard.

HTML
<script id='coframe-installation-script'>
  (function () {
    // Early exit for performance testing
    if (/cf_disable/.test(location.search)) return console.warn('[Coframe] Disabled via URL parameter');
  
    // Coframe config
    const config = {
      projectId: 'YOUR_PROJECT_ID',
      startTime: Date.now(),
      timeoutMs: 1000,
      currentUrl: window.location.href,
    };
  
    // Prevent duplicate installation
    const script_id = 'coframe-sdk-js';
    if (document.getElementById(script_id)) return console.warn('[Coframe] SDK already installed');
  
    // Coframe queue setup
    (window.CFQ = window.CFQ || []).push({ config });
  
    // Coframe antiflicker CSS
    const style = document.createElement('style');
    style.id = 'coframe-antiflicker';
    style.textContent =
      ':root { --cf-show: 0;}' +
      'body { opacity: var(--cf-show) !important; transition: opacity 0.2s ease; }'
    function hide() { document.head.appendChild(style); }
    function show() {
      document.documentElement.style.setProperty('--cf-show', '1');
      style.parentNode && style.parentNode.removeChild(style);
    }
    hide(); setTimeout(show, config.timeoutMs);
  
    // Coframe SDK JS
    var edgeUrl = new URL('https://edge.cofra.me/cf.js');
    edgeUrl.searchParams.set('config', encodeURIComponent(JSON.stringify(config)));
  
    const script = document.createElement('script');
    script.id = script_id;
    script.async = true;
    script.src = edgeUrl.toString();
    script.onerror = () => { show(); console.error('[Coframe] SDK failed to load'); };
    document.head.appendChild(script);
  })();
</script>

03Verify it is working

After publishing your Webflow site:

  • Open the live site in a browser, then open the browser console and confirm there are no [Coframe] error messages.
  • In the Network tab, look for a request to edge.cofra.me/cf.js. A successful 200 response means the SDK loaded correctly.
  • Check that a coframe-sdk-js script element appears in the DOM (you can inspect the <head> in the Elements panel).

For a full walkthrough of how to validate the integration and confirm that Coframe is operating as expected, see Testing and Validation.

04Optional configuration

The default script is designed to work without additional configuration. Once the SDK is installed, you can tune behavior using the following guides:

  • SDK options — timeout, disable conditions, and other core settings
  • Identity settings — associate SDK activity with a known user identity
  • Tracking settings — control which events and page interactions Coframe records
  • Anti-flicker — understand how the anti-flicker mechanism works and how to adjust it for your performance requirements

Related reading

Content and video lessons from Coframe documentation. Code examples are not executed on this page.

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