@putout/plugin-remove-useless-spread/lib/array/index.js

🐊Putout plugin adds ability to remove useless spread

'use strict';

const {types} = require('putout');
const {
    isNumericLiteral,
    isMemberExpression,
    isIdentifier,
} = types;

module.exports.report = () => `Avoid useless spread '...'`;

module.exports.match = () => ({
    '[...Array(__a)]': ({__a}) => !isNumericLiteral(__a),
    '[...__a(__args)]': ({__a}) => {
        if (!isMemberExpression(__a))
            return true;
        
        const isValues = isIdentifier(__a.property, {
            name: 'values',
        });
        
        const isObject = isIdentifier(__a.object, {
            name: 'Object',
        });
        
        if (isObject)
            return true;
        
        return !isValues;
    },
});

module.exports.replace = () => ({
    '[...Array(__a)]': 'Array(__a)',
    'for (const __a of [...__b]) __c': 'for (const __a of __b) __c',
    'Array.from([...__a])': 'Array.from(__a)',
    '[...__a(__args)]': '__a(__args)',
    'new Set([...__a])': 'new Set(__a)',
});