CSS and JavaScript Optimization Without Breaking Layouts

Asset optimization can reduce load time, but combining or deferring files too aggressively can break layouts, menus, or interactive elements.

Safe Tuning Approach

• Change one optimization setting at a time.
• Re-test critical pages and forms after each adjustment.
• Exclude known fragile assets rather than disabling all optimization.
• Keep a record of the last stable configuration.

Operational Guidance

Optimization should be measured against business-critical flows, not only home page speed tests. A faster site that breaks account access or checkout is not an improvement.