@brandingbrand/fscodestyle NPM

FSCodeStyle

This repository contains a set of linting rules for TypeScript React projects. These are the same rules used by Flagship. If you're developing a project using Flagship, we recommend enforcing these rules.

Pre-Requisites

Your project must have the following:

A tsconfig.json file indicating the root files and base directories for the TypeScript compiler

Usage

Add a dependency in your project yarn add @brandingbrand/fscodestyle
Add a lint script to your package.json "lint": "fscodestyle"

We recommend you set this up as a precommit hook using Husky

Linting

The linter uses tslint. In addition, the following rule extensions have been added:

tslint-eslint-rules - adds missing eslint rules to tslint
tslint-react - adds React rules to tslint

Highlights

Indentation: 2 spaces
Maximum line length: 100 characters
No more than two consecutive empty lines
No trailing whitespace at the end of lines
Use let and const instead of var
Use single quotes for string literals
Use === and !== instead of == and !=
TypeScript: Use const x: T = { ... }; notation instead of const x = { ...} as T;
TypeScript: Use interfaces over type literals

Rules in Depth

Name	Description	Package
arrow-parens	Arrow functions with multiple arguments must use parentheses; single arguments must not.	tslint
no-unnecessary-type-assertion	Warn if a type assertion is not necessary for an expression	tslint
typedef	Requires type definitions to exist. Checks function return types, parameters, and member variable declarations.	tslint
typedef-whitespace	Requires no space to exist to the left of the colon in a type definition	tslint
await-promise	Warns if an awaited value is not a promise.	tslint
no-floating-promises	Requires promises returned by functions to be handled appropriately.	tslint
no-inferred-empty-object-type	Disallow type inference of {} (empty object type) at function and constructor call sites	tslint
no-unbound-method	Disallow use of an unbound class method as a callback	tslint
no-unused-variable	Disallows unused imports, variables, functions, and private class members	tslint
use-default-type-parameter	Warns if an explicitly specified type argument is the default for that type parameter.	tslint
no-mergeable-namespace	Disallows mergeable namespaces in the same file.	tslint
array-type	Enforces use of `T[]` for array types	tslint
no-boolean-literal-compare	Warns on comparison to a boolean literal, as in `x === true`.	tslint
type-literal-delimiter	Checks that type literal members are separated by semicolons. Enforces a trailing semicolon for multiline type literals.	tslint
trailing-comma	Disallow trailing commas	tslint
no-constant-condition	Disallow use of constant expressions in conditions	tslint
cyclomatic-complexity	Allow maximum cyclomatic complexity of 10	tslint
switch-default	Require `default` case in `switch` statements	tslint
triple-equals	Require use of `===` and `!==`	tslint
guard-for-in	Make sure `for-in` loops have an `if` statement	tslint
no-switch-case-fall-through	Disallow fallthrough of `case` statements	tslint
no-magic-numbers	Disallow use of magic numbers except -1, 0, 1, 2, 100, 1000	tslint
no-duplicate-variable	Disallow declaring the same variable more than once	tslint
no-use-before-declare	Disallow use of variables before they are defined	tslint
variable-name	Require camel-cace names	tslint
linebreak-style	Enforce Unix-style linebreaks	tslint
no-consecutive-blank-lines	Disallow more than two consecutive blank lines	tslint
no-trailing-spaces	Disallow trailing whitespace at end of lines	tslint
one-variable-per-declaration	Require no more than one variable declaration per function	tslint
object-literal-key-quotes	Require quotes around object literal property names as needed	tslint
quotemark	Require single quotes for string literal	tslint
semicolon	Require semicolons	tslint
comment-format	Require that single-line comments begin with a space after the `//`	tslint
no-control-regex	Disallow control characters in regular expressions (recommended)	tslint-eslint-rules
no-duplicate-case	Disallow duplicate case labels in a switch statement	tslint-eslint-rules
no-empty-character-class	Disallow the use of empty character classes in regular expressions	tslint-eslint-rules
no-ex-assign	Disallow assigning to the expection in a `catch` block	tslint-eslint-rules
no-extra-semi	Disallow unnecessary semicolons	tslint-eslint-rules
no-inner-declarations	Disallow function declarations in nested blocks	tslint-eslint-rules
no-invalid-regexp	Disallow invalid regular expression strings in the `RegExp` constructor	tslint-eslint-rules
ter-no-irregular-whitespace	Disallow irregular whitespace	tslint-eslint-rules
no-regex-spaces	Disallow multiple spaces in a regular expression literal	tslint-eslint-rules
no-unexpected-multiline	Disallow code that looks like two expressions but is actually one	tslint-eslint-rules
valid-jsdoc	Enforce valid JSDoc comments	tslint-eslint-rules
valid-typeof	Ensure that the results of typeof are compared against a valid string	tslint-eslint-rules
no-multi-spaces	Disallow use of multiple spaces	tslint-eslint-rules
handle-callback-err	Enforce error handling in callbacks	tslint-eslint-rules
array-bracket-spacing	Disallow after and before array brackets	tslint-eslint-rules
block-spacing	Require spacies inside of single line blocks	tslint-eslint-rules
brace-style	Require "one true brace style" in which the opening brace of a block is placed on the same line as its statement or declaration	tslint-eslint-rules
ter-func-call-spacing	Require spacing between function identifiers and their incovations	tslint-eslint-rules
ter-indent	Enforce consistent indentation: 2 spaces	tslint-eslint-rules
ter-max-len	Enforce max line length of 100	tslint-eslint-rules

tslint tslint-react tslint-eslint-rules

@infinitebrahmanuniverse/nolb-_bra @everything-registry/sub-chunk-140

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