<div type="expander" caption="Object literals">
<p>
It's very easy to drop an ending `}` or `]` or otherwise have problems with object literals.
One way to help with that is to have some kind of source code "linter" installed. (There are
many options, like JSLint.) A linter will tell you if there's something structural problem
with your source code.
</p>
</div>

<div type="expander" caption="Imports">
<p>
The import path can be complicated, and the relative path will change depending on whether
the source file is nested sub-directories.
</p>
<p>
Some code editors, like WebStorm, will detect bad import paths.
</p>
</div>