New Script Embeds: The Future of Liveblogging

We just shipped a new way to embed Timepath Liveblog on your site: a lightweight script tag you drop into your page, no iframe required. This lets live updates behave like native page content (indexable, responsive, customizable) while still being safe and controllable by you. Try it: timepath.co/test-liveblog

Why move from an iframe to a script?

Many people think “iframes = safer” and that’s true in the narrow sense that iframes give a stronger browsing-context isolation by default. But that isolation also prevents important capabilities you usually want from a modern liveblog: content indexing, seamless styling, richer interactions, and advanced ad formats. MDN Web Docs

Script embeds give you practical benefits:

• Indexable content & SEO: content added by script can be crawled and ranked more easily than content trapped inside an iframe. Bits and Pieces

• Full styling + responsive design: embeds inherit the host page’s CSS and layout; they feel native. Bits and Pieces

• Better analytics & integrations: direct DOM access means easier event tracking and integration with your analytics stacks. Bits and Pieces

• Rich ad support: certain ad formats (expanding creatives, overlays, programmatic hooks) are much easier to implement from an in-page script than inside an isolated iframe. (That’s one of the reasons we now support ads in Liveblog.) Stack OverflowReddit

Bottom line: iframes are helpful when you need hard isolation. For publishers who want a first-class, brandable live experience — and ad monetization — a script embed is the better tradeoff.

How we keep script embeds safe

We’ve built safety controls into the embed and into how you should serve it (short checklist below). We also apply a CORS policy on our script endpoint so you control who can load the script from your domain and to prevent cross-origin surprises. (CORS is an HTTP-header mechanism browsers use to allow or block cross-origin resource loads.) MDN Web Docs

Ready-to-drop embed (example)

<!-- Timepath Liveblog script (example) --> <script src="https://liveblog-script.timepath.co/timepath-liveblog.umd.js" crossorigin="anonymous" async integrity="sha384-<your-sri-here>"></script> <div id="timepath-liveblog" data-liveblog-id="ABC123"></div> <script> TimepathLiveblog.render('#timepath-liveblog', { theme: 'compact' }); </script>

Notes:

• crossorigin="anonymous" + matching Access-Control-Allow-Origin on the script host ensures the browser treats the request correctly for SRI and other cross-origin checks. W3SchoolsStack Overflow

• We recommend async so the script won’t block initial paint.

Quick server-side examples (if you host resources)

Nginx:

add_header 'Access-Control-Allow-Origin' 'https://your-site.example'; add_header 'Access-Control-Allow-Methods' 'GET, OPTIONS'; add_header 'Access-Control-Allow-Headers' 'Content-Type';

Apache:

Header set Access-Control-Allow-Origin "https://your-site.example"

Want the old iframe fallback?

We provide an iframe fallback for maximum isolation but note the tradeoffs: the iframe approach preserves isolation yet loses SEO, styling and some ad features. Use it if you need strong sandboxing; use the script embed if you want a richer, monetizable live experience. MDN Web Docs

Security deep-dive: How we secure script embeds (short technical explainer)

Embedding live functionality via script raises sensible security questions. Here’s how we think about the risks and the controls we (and you) can use.

Main threat categories

• Supply-chain / script tampering: an attacker modifies the served script (mitigated by SRI + HTTPS).

• Cross-site data leakage: script running in host page could access page variables or cookies if misconfigured.

• XSS & content injection: content injected into the DOM must be sanitized.

• Unauthorized embedding: someone embeds your liveblog on a domain you don’t control.

Controls we use (and recommend)

1. HTTPS + Subresource Integrity (SRI) Always serve the script over HTTPS and use SRI so browsers verify the script hash before executing it. This prevents tampered payloads from running. MDN Web DocsCSS-Tricks

2. Tight CORS policy on the script endpoint Only allow approved origins to request the script (Access-Control-Allow-Origin set to your domain(s)). This reduces unauthorized embedding and ensures proper cross-origin handling. MDN Web Docs

3. Content Security Policy (CSP) Use Content-Security-Policy headers (script-src, connect-src, frame-ancestors, etc.) on your site to limit what the page and embedded scripts can do and where they can talk to. For example:

   Content-Security-Policy: default-src 'self'; script-src 'self' https://cdn.timepath.co 'sha256-<your-inline-hash>'; connect-src 'self' https://api.timepath.co; frame-ancestors 'none';

   CSP dramatically reduces XSS risk and controls network endpoints the script can contact. MDN Web Docs

4. Least-privilege embed API Our embed API exposes only the minimal public methods needed to render the liveblog; sensitive operations never run in the embed. Keep host-page integration to a minimum surface area.

5. Ad isolation inside the embed For ad units we isolate third-party ad creatives inside nested iframes (sandboxed) where appropriate combining the best of both worlds: native layout + carefully sandboxed ad creatives.

6. postMessage with origin checks If the host page and embed must exchange messages, we use window.postMessage and strictly verify the event.origin on both sides.

7. Server-side validation & logging Any data posted to our API from the embed is validated server-side and logged for anomaly detection.

8. Pen tests & SAST/DAST Regular security testing of the embed and its delivery pipeline is part of our release process.