how to check if Prettify is loaded

Question

I'm only loading the script if <pre class="prettyprint"> exists. I found that to initiate Prettify, you need to use prettyPrint();.

However, on pages that don't load the script, I get a Javascript error. Is there a way to test if Prettify is loaded, then run... else do nothing?

Answer 1

You can test for it like this:

if (window.prettyPrint) {
    prettyPrint();
}