Vue get previous selected option: To get the previously selected option in Vue.js, you can use a combination of data properties, event handlers, and conditional statements. First, define a data property to store the previously selected option, such as previousOption. Then, add an event handler to the select element that updates the previousOption property to the current selected value whenever the select input changes. Next, add a conditional statement to check whether the current selected value is the same as the previous value. If they are different, you can perform any necessary actions or update any relevant data properties based on the new selection. Overall, this approach allows you to track and react to changes in the selected option in Vue.js.

How can you track the previously selected option in a Vue.js?

This Vue.js code defines a method called onChange that is triggered whenever the select input changes. The method updates the previousOption data property with the previous selected value by getting it from the dataset.previousValue attribute of the select element. It also stores the current selected value in the dataset.previousValue attribute so that it can be retrieved the next time the select input changes.

This approach enables you to track the previously selected option in Vue.js by utilizing the HTML5 data-* attribute to store the previous value. The onChange method is then bound to the change event of the select element, allowing it to update the previousOption property whenever the user selects a new option.

Overall, this code provides a simple and effective way to track the previous selected option in Vue.js and perform any necessary actions or updates based on the new selection.

Vue get previous selected option Example

<div id="app">
    <select v-model="selectedOption" @change="onChange">
      <option disabled value="">Please select one</option>
      <option v-for="(option, index) in options" :value="option.value" :key="index">{{ option.label }}</option>
    </select>
    <p>Selected option: {{ selectedOption }}</p>
    <p>Previous option: {{ previousOption }}</p>
  </div>
  <script type="module">
    const app = Vue.createApp({
      data() {
        return {
          options: [
            { label: 'Vue', value: 'Vue' },
            { label: 'React', value: 'React' },
            { label: 'Angular', value: 'Angular' },
          ],
          selectedOption: '',
          previousOption: '',
        };
      },
      methods: {
        onChange(event) {
          this.previousOption = event.target.dataset.previousValue || '';
          event.target.dataset.previousValue = this.selectedOption;
        },
      },
    });
    app.mount("#app");
 </script>

Output of Vue get previous selected option