How to make router param changes as reactive in Vuejs explain with example

 
How to make router param changes as reactive in Vuejs explain with example

To make router param changes reactive in Vue.js, you can use the watch option within the component that receives the router params. This will allow the component to react to changes in the router params and update its data or rendering accordingly.

Here's an example of how to make router param changes reactive in Vue.js:

HTML

<template>
  <div>
    <p>Post ID: {{ post.id }}</p>
    <p>Post Title: {{ post.title }}</p>
    <p>Post Content: {{ post.content }}</p>
  </div>
</template>

<script>
import { defineComponent, watch } from

 'vue';
import { useRoute } from

 'vue-router';

export

 default defineComponent({
  setup() {
    const route = useRoute();
    const postId = route.params.id;

    const post = {
      id: postId,
      title: '',
      content: '',
    };

    watch(() => postId, async (newId) => {
      const postResponse = await fetch(`/api/posts/${newId}`);
      const postJson = await postResponse.json();

      post.title = postJson.title;
      post.content = postJson.content;
    });

    return { post };
  },
});
</script>

In this example, the watch option watches for changes in the postId property. When the postId changes, it fetches the corresponding post data from the API and updates the post object. This ensures that the component always displays the latest information for the selected post.

By using the watch option, you can make any router param changes reactive and ensure that your components always reflect the latest data. This is essential for creating dynamic and data-driven applications in Vue.js.

Sources

1. https://www.jianshu.com/p/3a25ad11a4e9

Sure, here are some potential interview questions and answers for the above prompt:

Q: How do you make router param changes reactive in Vue.js?

A: To make router param changes reactive in Vue.js, you can utilize the watch option within the component that receives the router params. This allows the component to monitor changes in the router params and update its data or rendering accordingly.

Q: Can you explain the purpose of the watch option in Vue.js?

A: The watch option in Vue.js serves as a reactivity mechanism that enables components to observe and respond to changes in specific data or expressions. It ensures that the component's rendering and behavior remain consistent with the updated data.

Q: How does the watch option ensure reactivity in the context of router param changes?

A: When using the watch option to monitor router params, you essentially instruct Vue.js to track any alterations in the param values. Upon detecting a change, Vue.js triggers the specified callback function, allowing the component to react accordingly.

Q: Can you provide an example of how to make router param changes reactive using the watch option?

A: Sure, consider a component that displays detailed information about a specific post based on the router param :id:

HTML

<template>
  <div>
    <p>Post ID: {{ post.id }}</p>
    <p>Post Title: {{ post.title }}</p>
    <p>Post Content: {{ post.content }}</p>
  </div>
</template>

<script>
import { defineComponent, watch } from

 'vue';
import { useRoute } from

 'vue-router';

export

 default defineComponent({
  setup() {
    const route = useRoute();
    const postId = route.params.id;

    const post = {
      id: postId,
      title: '',
      content: '',
    };

    watch(() => postId, async (newId) => {
      const postResponse = await fetch(`/api/posts/${newId}`);
      const postJson = await postResponse.json();

      post.title = postJson.title;
      post.content = postJson.content;
    });

    return { post };
  },
});
</script>

In this example, the watch option observes changes in postId and triggers the callback function whenever the value updates. The callback function then fetches the corresponding post data and updates the post object, ensuring that the component displays the latest information for the selected post.

Q: What are the benefits of making router param changes reactive in Vue.js?

A: Making router param changes reactive offers several advantages:

1. Dynamic Data Updates: The component automatically updates its data and rendering based on the latest router params, ensuring a dynamic and responsive user experience.

2. Reduced Re-rendering: Reactivity minimizes unnecessary re-rendering, improving performance and enhancing the overall user experience.

3. Consistent UI State: The component's UI state remains consistent with the current router params, providing a seamless and intuitive experience for users.

4. Data-Driven Applications: Reactivity enables the creation of data-driven applications that adapt to user actions and provide personalized experiences.

Sources

1. https://www.jianshu.com/p/3a25ad11a4e9