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96 lines
3.4 KiB
Markdown
96 lines
3.4 KiB
Markdown
# Contributing To Deno
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Check [the roadmap](https://github.com/denoland/deno/blob/master/Roadmap.md)
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before contributing.
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Please don't make [the benchmarks](https://denoland.github.io/deno/) worse.
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Ask for help in the issues or on the
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[chat room](https://gitter.im/denolife/Lobby).
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Progress towards future releases is tracked
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[here](https://github.com/denoland/deno/milestones).
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Docs are [here](https://github.com/denoland/deno/blob/master/Docs.md).
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## Submitting a pull request
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Before submitting, please make sure the following is done:
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1. Ensure `./tools/test.py` passes.
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2. Format your code with `./tools/format.py`.
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3. Make sure `./tools/lint.py` passes.
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## Changes to `third_party`
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Changes to `third_party` including any changes in the `package.json` will impact
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the [denoland/deno_third_party](https://github.com/denoland/deno_third_party)
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repository as well.
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## Adding Ops (aka bindings)
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We are very concerned about making mistakes when adding new APIs. When adding an
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Op to Deno, the counterpart interfaces on other platforms should be researched.
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Please list how this functionality is done in Go, Node, Rust, and Python.
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As an example, see how `deno.rename()` was proposed and added in
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[PR #671](https://github.com/denoland/deno/pull/671).
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## Documenting APIs
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It is important to document public APIs and we want to do that inline with the
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code. This helps ensure that code and documentation are tightly coupled
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together.
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### Utilize JSDoc
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All publicly exposed APIs and types, both via the `deno` module as well as the
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global/`window` namespace should have JSDoc documentation. This documentation is
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parsed and available to the TypeScript compiler, and therefore easy to provide
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further downstream. JSDoc blocks come just prior to the statement they apply to
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and are denoted by a leading `/**` before terminating with a `*/`. For example:
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```ts
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/** A simple JSDoc comment */
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export const FOO = "foo";
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```
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### JSDoc style guide
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- It is important that documentation is easily human readable, but there is also
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a need to provide additional styling information to ensure generated
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documentation is more rich text. Therefore JSDoc should generally follow
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markdown markup to enrich the text.
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- While markdown supports HTML tags, it is forbidden in JSDoc blocks.
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- Code string literals should be braced with the back-tick (\`) instead of
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quotes. For example:
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```ts
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/** Import something from the `deno` module. */
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```
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- Do not document function arguments unless they are non-obvious of their intent
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(though if they are non-obvious intent, the API should be considered anyways).
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Therefore `@param` should generally not be used.
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- Vertical spacing should be minimized whenever possible. Therefore single line
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comments should be written as:
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```ts
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/** This is a good single line JSDoc */
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```
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And not:
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```ts
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/**
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* This is a bad single line JSDoc
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*/
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```
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- Code examples should not utilise the triple-back tick (\`\`\`) notation or
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tags. They should just be marked by indentation, which requires a break before
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the block and 6 additional spaces for each line of the example. This is 4 more
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than the first column of the comment. For example:
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```ts
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/** A straight forward comment and an example:
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*
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* import { foo } from "deno";
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* foo("bar");
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*/
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```
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- Code examples should not contain additional comments. It is already inside a
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comment. If it needs further comments is not a good example.
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