const nodeEval = require('node-eval');

nodeEval('42 * 42'); // 1764

const nodeEval = require('node-eval');
const moduleContents =
`
    const package = require('./package.json');

    module.exports = {
        name: package.name
    };
`;

nodeEval(moduleContents, './index.js'); // filename need to provide required info to resolve relative paths inside evaluating code

// ➜ { name: 'node-eval' }

const nodeEval = require('node-eval');
const jsonContents = '{ "name": "node-eval" }';

nodeEval(jsonContents, 'my.json'); // filename need to `node-eval` determinate json format by extention

// ➜ { name: 'node-eval' }

const nodeEval = require('node-eval');

nodeEval('42 * 42'/* js by default */); // 1764
nodeEval('42 * 42', 'my.js'); // 1764
nodeEval('{ "name": "node-eval" }', 'my.json'); // '{ name: 'node-eval' }'

const nodeEval = require('node-eval');
const moduleContents =
`
    const package = require('./package.json'); // to resolve this require need to know the path of current module (./index.js)

    module.exports = {
        name: package.name
    };
`;

nodeEval(moduleContents, './index.js'); // filename need to provide required info to resolve relative paths inside evaluating code

const fs = require('fs');
const nodeEval = require('node-eval');

// For example, current path is "/repos/project/lib/file.js".
const modulePath = '../files/another.js';
const moduleContents = fs.readFileSync(modulePath, 'utf-8');

// '../files/another.js' will be resolved to '/repos/project/files/another.js'
nodeEval(moduleContents, modulePath);

const nodeEval = require('node-eval');

const secretKey = '^___^';
const contents = 'module.exports = secretKey;';

nodeEval(content, { secretKey }); // '^___^'