50 lines
1.8 KiB
Plaintext
50 lines
1.8 KiB
Plaintext
TypeScript style
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================
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Basics:
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- Indent with 2 spaces.
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- Keep a maximum line length of 120 characters.
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- Prefer "double quotes" for strings.
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- Never omit optional semicolons.
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- Do not put opening braces or brackets on a new line.
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- Call functions without spaces: foo(bar)
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- Use 'let' instead of 'var' whenever possible.
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- Declare "use strict;".
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- Use rocket (=>) syntax for anonymous functions. If an anonymous function is
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too long, make it a named function.
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- Use the strict equality operator (===).
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- Document functions with JSDoc comments (http://usejsdoc.org).
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JavaScript version:
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Stick to ES6 features. Do not rely on any vendor-specific extensions (such as
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Firefox often offers). ES6 features not yet supported by major browsers are
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okay as long as there is a well-supported and reasonable polyfill (such as
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babel) available.
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Names:
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- Use PascalCase for classes/types, camelCase for variables, functions and
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properties, UPPER_SNAKE_CASE for constants, kebab-case for event names.
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- Only capitalize the first letter of an acronym in identifiers (e.g. HttpResponseCode).
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APIs:
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- Prefer 'Promise' to one-shot continuations whenever possible.
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- Prefer handlebars templates to poking around in the DOM.
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Dependency Injection (DI):
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DI is a useful pattern when components need to be replaced by mocks or have
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multiple co-existing implementations. But DI also makes code overly generic,
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bureaucratic and less readable. Only use DI if there is a definite need for it,
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do not use it by default. Inject individual dependencies via class
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constructors and avoid service locators.
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Misc:
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- Do not use ES6 template strings for constructing HTML,
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use TSX/JSX literals instead.
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- For everything not covered here, stick to this style guide:
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https://github.com/airbnb/javascript.
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