Bug Description The code attempts to change the content of a div element using Javascript. It mistakenly uses innerHtml instead of the correct innerHTML property.

The `innerHTML` is a property that gets or sets the HTML content inside an element. Parses and renders HTML tags Can modify the HTML structure of an element Slower performance due to HTML parsing ...

For those with a little JavaScript experience, try using the innerHTML property of the div tag to expand and contract outlines and add interactive help to your site.