How to call methods in App.vue from the vue components

Question

I have a vue component and a vue element declaration as given below

Vue.component('todo-item', {
    template: '<li>This is a todo</li>'
    methods: {
        test: function() {
            
            // I am getting an error here
            app.aNewFunction();
        }
    }
})

var app = new Vue({
    el: '#app',
    data: {
        message: 'Hello Vue!'
    },
    methods: {
        aNewFunction: function() {
            alert("inside");
        }
    }
}) 

How to call a method in vue app from the vue component?

Answer 1

You can execute root instance method like this: this.$root.methodName()

Vue.component('todo-item', {
    template: '<li>This is a todo</li>',
    methods: {
        test: function() {
            this.$root.aNewFunction();
        }
    },
    mounted() {
        this.test();
    }
})
  
new Vue({
    el: '#app',
    template: '<todo-item></todo-item>',
    methods: {
        aNewFunction: function() {
            alert("inside");
        }
    }
})