#React dom 16 script tag unpkg reference registration

We can get the element in the onMounted Lifecycle hook like in the example. So we can access the element after the initial render. Indeed, V-Node key root matches with ref of the render context. return from the setup function(const root = ref(null)) During the Virtual DOM mount operation, if the V-Node key matches with the ref of the render context, then the component instance/element is assigned to the value of the ref.

In the above example, root is the reactive ref object which returned from the setup function. the DOM element will be assigned to the ref after initial renderĬonsole.log(root.value) // Welcome to ProgramEasily But here we can access the component instance/element with the help of reactive ref. Generally we are using $refs to access the component instance/element. We can integrate the two concepts Template Refs and Reactive Refs in the Composition API. Template Refs in Vue.js – Composition API We have to add the input-comp in the index.html like below. We can access them using this.$refs.input. In the above example, we need to call the updateInput method in the onMounted hook. Now we are going to create the base-input component and use ref as follows, Secondly we can not use $refs inside the template and data binding since it is not reactive. So we can not access it on the initial render. Firstly these processes are done after the component render operation.

#React dom 16 script tag unpkg reference registration

However ref registration timing is very important. The parent component $refs object, stores the ref reference.

If ref is used on the child component, then the reference is mapped to the component instance. If ref is used on the HTML DOM element then the reference is mapped to the respected element. We can use ref to create the reference for the element or child component. Read Components in Vue3 and Single File Components Vue 3 if you are new to Vue.js components. Let’s take a deep dive into this with an example. We can create a reference variable using the ref attribute for child components/elements.ĭuring the virtual DOM mounting process, if the V-Node(HTML element or child component) has a ref attribute then the respected element or component instance will be stored under the parent component’s $refs. Though we are having props and events for creating communication with child components, Vue.js provides the special attribute ref. Sometimes while creating components, we need to access its child components or child HTML elements directly in the JavaScript.