string2object.js

const stringsRegExp = /("[^"]*?"|'[^']*?')/gm;
const numbersRegExp = /\d/gm;
const keysRegExp = /([{,])[\w\d]*?(\:)/gm;
const validTestRegExp = /^[\{\}\[\]\,]*$/;

const removeWhiteSpaces = function(str) {
    return (str + '').replace(/\s*/gm, '');
};

const trim = function(str) {
    return (str + '').replace(/^\s*(\S*?)\s*$/m, '$1');
};

export default function string2Object(input) {
    if (!input) {
        return input;
    }
    let memo = removeWhiteSpaces(input + '')
        .replace(stringsRegExp, '')
        .replace(numbersRegExp, '')
        .replace(keysRegExp, '$1');
    let isValid = validTestRegExp.test(memo);
    if (isValid) {
        return (new Function(`return ${trim(input)}`))();
    }
    return input;
};