TSLint is deprecated. All of the rules in this package have equivalent ESLint rules in the eslint-plugin-etc package or have 'official' ESLint equivalents.

And ESLint implementations this package's dtslint-related rules can be found in the eslint-plugin-dtslint package.

tslint-etc is set of TSLint rules to enforce policies that cannot be specified - or easily specified - with the built-in rules.

Install the package using NPM:

npm install tslint-etc --save-dev

Update your tslint.json file to extend this package and add any rules you want to configure to the rules object:

{
  "extends": [
    "tslint-etc"
  ],
  "rules": {
    "throw-error": { "severity": "error" }
  }
}

WARNING: Before configuring any of the following rules, you should ensure that TSLint's no-unused-variable rule is not enabled in your configuration (or in any configuration that you extend). That rule has caused problems in the past - as it leaves the TypeScript program in an unstable state - and has a significant number of still-open issues. Consider using this package's no-unused-declaration rule instead.

The package includes the following rules (none of which are enabled by default):

The ban-imports rule takes an object containing keys that are regular expressions and values that are either booleans or strings containing the explanation for the ban.

For example, to following configuration would disallow "foo" with an explanation, would disallow "bar" without an explanation and would allow "baz":

"rules": {
  "ban-imports": {
    "options": [{
      "^foo$": "'foo' has been deprecated; use 'baz'",
      "^bar$": true,
      "^baz$": false
    }],
    "severity": "error"
  }
}

This rule takes an optional object with an optional allowLocal property - which defaults to false. If allowLocal is true, only exported const enums are forbidden.

For example, to following configuration would local (i.e. non-exported) const enums:

"rules": {
  "no-const-enum": {
    "options": [{
      "allowLocal": true
    }],
    "severity": "error"
  }
}

This rule takes an optional object with optional allowMethods, allowParameters and allowProperties properties.

If the allowMethods option is true, calling methods via this is allowed.

If the allowParameters option is true, referencing function parameters from outer scopes is allowed.

If the allowProperties option is true, accessing properties via this is allowed.

The following options are equivalent to the rule's default configuration:

"rules": {
  "no-unsafe-callback-scope": {
    "options": [{
      "allowMethods": true,
      "allowParameters": true,
      "allowProperties": false
    }],
    "severity": "error"
  }
}

This rule has a fixer. However, the fixer will only remove unused import declarations. It will not remove other kinds of declarations, as doing so could be potentially destructive.

For example, having it remove a function that you've spent time writing - just because you've not yet exported or called it - would be too dispiriting, so the rule will just flag it as a failure and leave the function untouched.

The rule takes an optional object with optional imports, declarations and ignored properties. The imports and declarations properties are booleans and determine whether or not unused imports or declarations are allowed. They default to true. The ignored property is an object containing keys that are regular expressions and values that are booleans - indicating whether or not matches are ignored.

For example:

"rules": {
  "no-unused-declaration": {
    "options": [{
      "declarations": true,
      "ignored": {},
      "imports": true
    }],
    "severity": "error"
  }
}