Prove the popup is eligible to display before changing asset optimization. Different failure stages require different fixes.
Document the expected display rule
Record the popup’s publication state, target page, conditions, trigger and frequency restrictions. Use a fresh staging visitor state when testing a first-visit prompt. Confirm the target page actually meets the configured rules. A popup intentionally suppressed after dismissal is not evidence that a delayed script failed.
Test a deliberate activation
Where the integration supports it, use a known explicit opener on the intended page. Compare that with the automatic trigger. If explicit opening works but automatic opening does not, investigate eligibility and timing first. If neither works, inspect the first console error and whether the popup component initializes.
Distinguish hidden from unstyled content
Inspect whether popup markup appears after activation. Missing markup suggests a different path from a visible overlay with absent formatting. If content exists but is hidden, check the controlling classes and styles. Do not simply raise z-index repeatedly: a stacking adjustment cannot initialize a component or restore missing style rules.
Review optimization at the failing stage
On staging, restore the specific required scripts or styles through the optimization owner’s supported controls. Include dynamically created popup selectors when evaluating CSS removal. Keep the original trigger rules for comparison. A broad exception for all generated assets can hide the cause and increase delivery cost on unrelated pages.
Verify dismissal and subsequent visits
Test opening, closing, keyboard focus, scroll restoration and the next visit according to the documented frequency rule. Include a mobile viewport and long popup text. Restore the baseline if the overlay traps visitors or blocks required actions. Save the exact rule, state and failure stage for vendor support.
Symptom-to-cause worksheet
| What you observe | What to investigate | Next check |
|---|---|---|
| Explicit opener works, automatic does not | Trigger or eligibility | Inspect conditions and frequency state |
| Overlay exists but layout is wrong | Dynamic styles missing | Review required selectors |
| No initialization, console error | Dependency or script issue | Trace first failing script |
Worked investigation scenario
Illustrative investigation, not a measured Velonic result. Suppose a popup does not appear because its frequency rule remembers a prior dismissal. A clean test state restores it without any optimization change. Now test the real first-visit flow and dismissal. If an optimization defect also exists, reproduce it separately. This prevents loosening a deliberate marketing rule merely to compensate for an incorrectly constructed test.
Put it into practice
- Record eligibility, trigger and frequency rules.
- Separate missing markup from missing styling.
- Test closing, focus and scroll restoration.
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