Real-Time Traffic Monitoring Dashboard

Search AI Powered
Human content, AI powered search.

Latest Stories

How to Fix: Script Error That Prevents Elements From Loading | "Function YYYY Is Not Defined"

Text: "Avoid Script Errors - RebelMouse Layout & Design Tool" on dark background.
Anne Burns
By Anne BurnsJun 26, 2026
Anne Burns
Director of Marketing

Branding specialist with over ten years of experience in integrated marketing strategies, digital and social content, search engine optimization, and online advertising. I have led efforts to bring newsrooms, small businesses, and legacy brands into a digital presence that’s true to brand, profitable, and personalized.

See Full Bio
Follow:

One of the most common errors we see in developer consoles is: "Function YYYY is not defined."

To avoid this issue whenever you have a custom function, verify that the function exists in the previous page:

Design interface with HTML script validation highlighted.

This is particularly important because this error can break your infinite scroll or other native JavaScript on RebelMouse. If you have any questions, please email support@rebelmouse.com.

We've helped ambitious teams launch, grow,
and outperform. Now it's your turn.
Whether you need a custom solution, a smarter strategy, or just someone to bounce ideas off — we're here for it.
Let's Talk