This style guide explains our standards and guidelines for contributors to the PostHog documentation.
PostHog is a product for developers, so our documentation is key to a good developer experience. We want it to be complete and concise, well-written, and easy to understand.
You likely know more than your reader in the area you're writing about. That is why you're documenting it!
As you gain mastery of a product or feature, some things become second nature. You know them without thinking about it. But they weren't so obvious at first. Call these out, and provide links to relevant docs or websites.
Make it easy for your reader to implement their feature or solve their issue, whether they are an expert or just starting out with PostHog.
Of course our audience is developers, so you can assume some baseline knowledge.
Use American English
PostHog is a global company. Our team and our customers are distributed around the world. For consistency, we use American English spelling and grammar.
Use Allowlist/Denylist instead of Whitelist/Blocklist This term is clearer, and isn't rooted in the idea that white=good, black=bad.
Use the Oxford comma
Write "bananas, apples, and oranges", not "bananas, apples and oranges".
Why does this matter? Consider the old joke:
"There are two hard problems in computer science: naming things, cache invalidation, and off by one errors."
That doesn't work without the Oxford. Of course we are not so fussy in real life, but we are persnickety with our documentation.
Capitalize proper names as appropriate
Write "Redis server", not "redis server".
Capitalize acronyms, and link the first use to a definition if they are unfamiliar
Write "URLs", not "urls".
Many acronyms, like that one, will be familiar to developers. But when in doubt, link the first use of an acronym to its definition.
Use sentence case for titles
Write "Documentation style guide", not "Documentation Style Guide".
Use sentence case for feature names There's plenty of discussion about this, but in short: If it's a feature name then it's a proper noun and should NOT be capitalized, e.g. feature flags, group analytics, product analytics.
Follow the style standards of each programming language
In code samples, use the conventions of the language the code is written in.
For example, JavaScript uses PascalCase for class/constructor names, and camelCase for most other names. Python uses PascalCase for classes, and snake_case for most other names. And so on.
Third-party cookies
We talk a lot about "third-party cookies". And that's how we spell them. Same for "first-party cookies".
"PostHog doesn't require third-party cookies."
Always provide a link
Don't just write "You can contact us to learn more" and not link it to anything.
Write "To learn more, join our community."
The backtick is your friend
Remember to use backticks around inline code snippets, and triple backticks around multiline code samples.
Do not fear the copyeditor
Whatever documentation improvement you submit, we are grateful for it. Don't worry if you think it may fall short of any of these recommendations. We are happy to have your assistance in improving our docs, and we will work with you to copyedit your contributions.
Use analytics platform
When talking about PostHog in content, substitute references to “product analytics” or “product analytics tool” with the phrase “analytics platform”.
Example: “A data warehouse or product analytics tool like PostHog can be helpful here.” would become “A data warehouse or analytics platform like PostHog can be helpful here.
Exception would be specific references to our product analytics suite (e.g. when comparing rival product analytics tools to our product analytics product).