eslint-plugin-types

A type checking plugin for eslint.

Installation

You'll first need to install ESLint:

``
$ npm i eslint --save-dev
`

Next, install eslint-plugin-types:

`
$ npm install eslint-plugin-types --save-dev
`

Note: If you installed ESLint globally (using the -g flag) then you must also install eslint-plugin-types globally.

Usage

Add types to the plugins section of your .eslintrc configuration file. You can omit the eslint-plugin- prefix:

`json
{
"plugins": [
"types"
]
}
`


Then configure the rules you want to use under the rules section.

`json
{
"rules": {
"types/assign-type": 2,
"types/array-type": 2
}
}
`

Supported Rules

$3

Correct:
`javascript
let a = 'one';
a = 'two';

function example1 () {
let a = 1;
a = 2;
}

function example2 () {
a = 'three';
}
`

Incorrect:
`javascript
let a = '1';
a = 2; // error
`

$3

Correct:
`javascript
let a = [1, 2];
a.push(3);
a[2] = 4;
`

Incorrect:
`javascript
let a = [1, 2, '3']; // error
a.push('4'); // error
a[3] = '5'; // error

let b = [];
b.push(1);
b.push('2'); // error
``