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140 lines
3.6 KiB
Markdown
140 lines
3.6 KiB
Markdown
# Deno Standard Modules
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[](https://dev.azure.com/denoland/deno_std/_build/latest?definitionId=2?branchName=master)
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- **[colors](./colors/)**
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Modules that generate ANSI color codes for the console.
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- **[flags](./flags/)**
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Command line arguments parser.
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- **[log](./log/)**
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Command line logging
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- **[media_types](./media_types/)**
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A library for resolving media types (MIME types) and extensions.
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- **[mkdirp](./fs/)**
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Make directory branches.
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- **[http](./http/)**
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A framework for creating HTTP/HTTPS servers inspired by GoLang.
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- **[path](./fs/path)**
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File path manipulation.
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- **[testing](./testing/)**
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Testing
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## Style Guide
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### Use the term "module" instead of "library" or "package"
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For clarity and consistency avoid the terms "library" and "package". Instead use
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"module" to refer to a single JS or TS file and also to refer to a directory of
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TS/JS code.
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### Use the filename "mod.ts" as the default entry point to a directory of code
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`index.ts` comes with the wrong connotations - and `main.ts` should be reserved
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for executable programs. The filename `mod.ts` follows Rust’s convention, is
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shorter than `index.ts`, and doesn’t come with any preconceived notions about
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how it might work.
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### Within `deno_std`, do not depend on external code
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`deno_std` is intended to be baseline functionality that all Deno programs can
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rely on. We want to guarantee to users that this code does not include
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potentially unreviewed third party code.
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### Within `deno_std`, minimize dependencies; do not make circular imports.
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Although `deno_std` is a standalone codebase, we must still be careful to keep
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the internal dependencies simple and manageable. In particular, be careful to
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not to introduce circular imports.
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### For consistency, use underscores, not dashes in filenames.
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Example: Instead of `file-server.ts` use `file_server.ts`.
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### Format code according using prettier.
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More specifically, code should be wrapped at 80 columns and use 2-space
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indentation and use camel-case. Use `//format.ts` to invoke prettier.
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### Use JS Doc to document exported machinery
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We strive for complete documentation. Every exported symbol ideally should have
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a documentation line.
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If possible, use a single line for the JS Doc. Example:
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```ts
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/** foo does bar. */
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export function foo() {
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// ...
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}
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```
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See [CONTRIBUTING.md](https://github.com/denoland/deno/blob/master/.github/CONTRIBUTING.md#documenting-apis)
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for more details.
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### TODO Comments
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TODO comments should be include an issue or the author's github username in
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parentheses. Example:
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```
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// TODO(ry) Add tests.
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// TODO(#123) Support Windows.
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```
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### Copyright headers
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Most files in `deno_std` should have the following copyright header:
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```
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// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
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```
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If the code originates elsewhere, ensure that the file has the proper copyright
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headers. We only allow MIT, BSD, and Apache licensed code in `deno_std`.
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### Top level functions should not use arrow syntax
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Top level functions should use the `function` keyword. Arrow syntax should be
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limited to closures.
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Bad
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```
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export const foo(): string => {
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return "bar";
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}
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```
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Good
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```
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export function foo(): string {
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return "bar";
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}
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```
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### When referencing Deno online, use the #denoland tag.
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The name "deno" unfortunately is not especially unique on the internet. In order
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to centralize the community, please tag github project, tweet, and other content
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with `#denoland`.
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---
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Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
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