Returns all object propertys using this scope in a ES6 class parsed to a JSON

ObjectoToJson.js

toJson(){
    let _obj: any = {};
    let _str:string = "";
    for (const key in this) {
        if (this.hasOwnProperty(key)) {
            _str = key;
            _str = _str.replace(_str.charAt(0),"");
            _obj[_str] = this["_"+_str];                
        }
    }
    return JSON.stringify(_obj);
}