While that's true in this case, it's considered a bad practice to eval json to get a javascript object. Most browsers (all modern ones) have a JSON.parse method

While that's true in this case, it's considered a bad practice to eval json to get a javascript object. Most browsers (all modern ones) have a JSON.parse method that will safely evaluate all json strings to js object. The really old browsers have libraries to accomplish this. It seems that this article hasn't been updated in a while by the very fact that the next section is called "JSON-in-script output" and not jsonp, keep in mind this article even has a reference to json.org on the bottom of that page which includes a library to do said function