plugin-declare

@putout/plugin-declare

🐊Putout plugin adds ability to declare variable that was not defined before, including:

• maybe: maybeArray, maybeFn, maybeEmptyArray;
• wrap: not,id, returns;
• set: difference;
• fresh-import: freshImport, freshImportDefault;
• fixtures: readFixture;
• properties of Object;
• properties of String + addQuotes;
• wraptile;
• fullstore;
• currify;
• pipe-io;
• pullout;
• wait;
• chalk;
• jessy;
• nessy;
• rendy;
• table;

Install

npm i putout @putout/plugin-declare -D

Add .putout.json with:

{
    "plugins": {
        "declare": "on"
    }
}

Rules

Use options:

• ✅ dismiss for variables you don't want to declare;
• ✅ declarations to declare variables;

{
    "rules": {
        "declare": ["on", {
            "declarations": {
                "hello": "import {hello} from 'world'"
            },
            "dismiss": [
                "assert",
                "entries",
                "parse",
                "stringify",
                "defineProperty",
                "noop",
                "join",
                "keys",
                "values",
                "stopAll",
                "once",
                "putout"
            ]
        }]
    }
}

assign

❌ Example of incorrect code

const hello = 'world';
const object = {};

assign(object, {
    hello,
});

✅ Example of correct code

const hello = 'world';
const object = {};
const {assign} = Object;

assign(object, {
    hello,
});

keys

❌ Example of incorrect code

const hello = 'world';
const object = {};

const allKeys = keys(object);

✅ Example of correct code

const hello = 'world';
const object = {};
const {keys} = Object;

const allKeys = keys(object);

values

❌ Example of incorrect code

const object = {};
const allValues = values(object);

✅ Example of correct code

const {values} = Object;

const object = {};
const allValues = values(object);

noop

❌ Example of incorrect code

noop();

✅ Example of correct code

const noop = () => {};
noop();

Types

❌ Example of incorrect code

const isFn = (a) => typeof a === 'function';

if (isFn(fn))
    fn();

✅ Example of correct code

const isFn = (a) => typeof a === 'function';

if (isFn(fn))
    fn();

Maybe

❌ Example of incorrect code

const a = maybeArray(b);

✅ Example of correct code

const {isArray} = Array;
const maybeArray = (a) => isArray(a) ? a : [a];

const a = maybeArray(b);

entries

❌ Example of incorrect code

entries([1, 2, 3]);

✅ Example of correct code

const {entries} = Object;

entries([1, 2, 3]);

fromEntries

❌ Example of incorrect code

fromEntries(['hello', 'world']);

✅ Example of correct code

const {fromEntries} = Object;

fromEntries(['hello', 'world']);

fromCharCode

❌ Example of incorrect code

const encoded = new TextEncoder().encode(str);
fromCharCode(...encoded);

✅ Example of correct code

const {fromCharCode} = String;
const encoded = new TextEncoder().encode(str);

fromCharCode(...encoded);

License

MIT