//delete question
    delQuest = ()=>{
        this.nameOfQuest = this.getName(questionList.questions, this.randQuest);
        delete questionList.questions[this.nameOfQuest];
        let validate = Object.keys(questionList.questions).length;
        if(validate===0){
            alert('molca dlo');
        }
    }

//get name of value
    getName = (obj, value)=>{
        value = JSON.stringify(value);
        return Object.keys(obj).find(key => JSON.stringify(obj[key]) === value);
    }

//random property from object
    randomProp = (obj)=>{
        let keys = Object.keys(obj)
        return obj[keys[keys.length * Math.random() << 0]]
    }