Vue Js Count Number of Keys/Property of Object : In Vue.js, you can work with objects by binding their properties to your templates using Vue’s data binding syntax. When you have an object, you might want to know the number of properties or keys it has so that you can loop over them or perform other operations.

To get the count of keys in an object in Vue.js, you can use the Object.keys() method. This method returns an array of all the keys in the object, which you can then access using the length property to get the count of those keys.

How can you count the number of properties of an object in Vue.js?

This code sets up a Vue.js application with a single instance called app, which is attached to an HTML element with an id of app. The data property of app contains an object called myObject with three properties: name, age, and role.

The computed property numKeys uses the Object.keys() method to calculate the number of keys in myObject, which is then displayed in the HTML template using double curly braces {{ }}. This means that whenever myObject is updated, the computed property numKeys is automatically re-evaluated and the displayed value is updated accordingly.

Overall, this code demonstrates how Vue.js makes it easy to create reactive data bindings between JavaScript data objects and HTML templates.

Vue Js Count Number of Property of object Example

<div id="app">
   <p>Number of keys/Propety in myObject: {{ numKeys }}</p>
</div>
<script type="module">
        const app = new Vue({
            el: "#app",
            data() {
                return {
                    myObject: {
                        name: 'Andrew',
                        age: 31,
                        role: 'developer'
                    }
                }
            },
            computed: {
                numKeys() {
                    return Object.keys(this.myObject).length;
                }
            }
        });
</script>

Output of Vue Js Get Length of Object