[Vue] 뒤로가기 막기

 mounted: function(){
        this.preventBack();
    },
    methods: {
        preventBack: function() {
            const thisObject = this;
            history.pushState(null, null, location.href);
            window.onbeforeunload = null;

            window.onpopstate = function () {
                history.go(1);
            };
        },
    }