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2026-03-19 16:32
Building a New-Gen Chat Widget: CSS and JavaScript Isolation with Cross-Origin Iframes
Chat widgets are embedded into customer websites that we don’t control. Those websites have their own CSS, JavaScript, and globals. Without proper isolation, the widget becomes vulnerable to style pollution, namespace conflicts, and security attacks from the host page.
In this post, we'll explore the problems embedded widgets face and how cross-origin iframe isolation creates a bulletproof b...
