How to pass Vue.js component value to pure JavaScript

I'm curious if it's possible to access the data of a component, specifically the count property, in regular JavaScript and log it. Can I use console.log(btn.data.count) for this purpose?

<div id="app" v-cloak>
        <h1>{{greeting}}</h1>

        <button-counter></button-counter>
    </div>
    <script src="https://unpkg.com/vue@next"></script>

    <script>


        let app = Vue.createApp({
            data: function(){
                return {
                  greeting: "hi"
                }
            }
        })

        let btn = app.component('button-counter', {
            data: function () {
                return {
                    count: 0
                }
            },
            template: '<button v-on:click="count++">You clicked me {{ count }} times.</button>'
        })
        console.log(btn.data.count) // Unable to retrieve count data here
        app.mount("#app")
    </script>

Answer №1

It's possible that there are several cases of the button-counter component, which means you can't request for the count.

You're only able to retrieve data from within the component itself. One way to do this is by using a method that deals with the click event:

        let btn = app.component('button-counter', {
            data: function () {
                return {
                    count: 0
                }
            },
            methods: {
              onClick() {
                console.log(this.count)
                this.count++
              }
            },
            template: '<button v-on:click="onClick">You clicked me {{ count }} times.</button>'
        })

Answer №2

Using console.log should be done in the right context, such as after a specific event occurs. Placing it before the mounting of #app doesn't provide much value.

To better understand its function, create a method for your count++ and include console log within it. This way, you can observe when it is executed each time.

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