tslint

A linter for the TypeScript language.

Supported Rules

• semicolon enforces semicolons at the end of every statement.
• eqeqeq enforces === and !== in favor of == and !=.
• maxlen sets the maximum length of a line.
• whitespace enforces whitespace between a keyword and a conditional, surrounding an operator, and enclosing "=" within variable declarations and import/export statements.
• quotemark enforces consistent single or double quoted string literals.
• oneline enforces an opening brace to be on the same line as the expression preceding it.
• trailing disallows trailing whitespace at the end of a line.
• bitwise disallows bitwise operators.
• evil disallows eval function invocations.
• eofline enforces the file to end with a newline.
• classname enforces PascalCased class names.
• varname allows only camelCased or UPPER_CASED variable names.
• noarg disallows access to arguments.callee.
• sub disallows object access via string literals.
• forin enforces a for ... in statement to be filtered with an if statement.
• debug disallows debugger statements.
• curly enforces braces for if/for/do/while statements.
• indent enforces consistent indentation levels for the whole file.

Installation

CLI

sudo npm install tslint -g

Library

npm install tslint

Usage

CLI

usage: tslint

Options:
  -c, --config  configuration file
  -f, --file    file to lint                 [required]
  -o, --out     output file
  -t, --format  output format (prose, json)  [default: "prose"]

By default, configuration is loaded from .tslintrc, if it exists in the current path.

Library

var options = {
    formatter: "json",
    configuration: configuration
};

var Linter = require("tslint");

var ll = new Linter(fileName, contents, options);
var result = ll.lint();

Development

Setup

git clone git@github.com:palantir/tslint.git
cd tslint
git submodule init
git submodule update

Build

npm install
grunt

TODO

• Disallow variables referenced outside of their scope definition
• Disallow unused variables