Vue Js Check if Element contains a specific CSS Class Name:Vue.js is a progressive JavaScript framework used for building user interfaces. One common

HTML Structure: Checking Class Presence

In the provided code snippet, we have an HTML structure with a div element having an id of “my-element” and a class of “example-class”. The goal is to determine if this element contains the class “example-class” and then display a message accordingly.

To accomplish this, we create a Vue.js application inside a div with an id of “app”. Within the Vue app, we define a data property called elementContainsClass and initialize it as false. This property will be used to track whether the element contains the specified class.

Vue.js: Determine if an Element Possesses a Specific CSS Class

<div id="app">
    <h3>Vue.js Check If Element Contains A Specific CSS Class Name</h3>
    <div id="my-element" class="example-class">
      This is Element
    </div>
    <div v-if="elementContainsClass" class="contains-class">
      Element contains the class "example-class"
    </div>
    <div v-else class="does-not-contain-class">
      Element does not contain the class "example-class"
    </div>
  </div>

Verifying Class Presence: Javascript Code Logic

In the mounted lifecycle hook, which is called after the Vue instance has been mounted, we call the checkIfElementContainsClass method. Inside this method, we use document.getElementById to obtain the DOM element with the id “my-element”. We then use the classList.contains method to check if the element contains the class “example-class”. If it does, weset elementContainsClass to true; otherwise, it is set to false.

 <script type="module">
    const app = Vue.createApp({
      data() {
        return {
          elementContainsClass: false
        };
      },
      mounted() {
        this.checkIfElementContainsClass();
      },
      methods: {
        checkIfElementContainsClass() {
          const element = document.getElementById('my-element');
          if (element.classList.contains('example-class')) {
            this.elementContainsClass = true;
          } else {
            this.elementContainsClass = false;
          }
        }
      }
    });
    app.mount("#app");
  </script>

Output of Verifying Element Class Presence with Vue.js

Summary: Vue.js for Class Presence

When you run this Vue.js application, it will automatically check if the “my-element” contains the “example-class” and display the appropriate message. This demonstrates how Vue.js can be used to dynamically determine the presence of a specific CSS class within an HTML element.

In conclusion, Vue.js provides a convenient way to check for the existence of a CSS class in an HTML element, allowing you to create dynamic and responsive web applications with ease.