Using JSON.stringify (toJSON) and JSON.parse (fromJSON) to (re)store JavaScript classes

json-stringify-parse.js

class Commit {
    constructor(sha, payload) {
        this.sha = sha;
        this.repository = payload.repository;
        this.created = new Date();
    }

    toJSON() {
        return Object.assign({}, this, {
            created: this.created.toString()
        });
    }

    static fromJSON(json) {
        const commit = Object.create(Commit.prototype);

        return Object.assign(commit, json, {
            created: new Date(json.created)
        });
    }
}

let data = JSON.stringify(new Commit('b59a0b03d93f63', {
    "repository": {
        "owner": "xtreamwayz",
        "name": "my-repo"
    },
}));
let commit = Commit.fromJSON(JSON.parse(data));

console.log(data === JSON.stringify(commit), JSON.stringify(commit));