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The console reveals all! Use the browser tools to check if there are any errors showing up in the console. Keep in mind that any JavaScript error on your page may prevent further code execution.

To verify your installation, simply include in your code, for example, console.log(Fancybox);. If you get an undefined error, Fancybox is not loading successfully and you should double-check your setup.

Ask for help on Stack Overflow (use tags fancybox or fancyapps), or on our GitHub repository.


Do not forget to check FAQ and to create a demo where your issue could be inspected before posting your question!