These are starting to be red flags:

• "It's just a one off script"
• "It's only css/html/javascript"

Anything that gets committed to git and pushed into production should NOT be treated as a 'one off' or trivialized because it's not 'real programming.'

It actually costs more engineer time to grok, test, fix and refactor one-offs/trivial code than their meatier companions when the former aren't treated with respect.