Vue component functions failing to execute

I've recently started exploring Vue and encountered an issue with a component's "mounted" method not triggering. Despite thorough checks for errors or warnings, and reviewing the code multiple times, I can't seem to pinpoint the problem. Strangely enough, when I tested logging within the Post component, it worked fine but failed in the Comment component. Below is the relevant code snippet:

Post component:

<template>
  <div class="blog-post">
    <h2>{{ title }}</h2>
    <p>{{ body }}</p>
    <div class="comment-section">
      <Comment
        v-for="comment in comments"
        v-bind:key="comment.id"
        :name="comment.name"
        :email="comment.email"
        :body="comment.body"
      />
    </div>
  </div>
</template>

<script>
import axios from "axios";
import Comment from "./Comment";

export default {
  name: "Post",
  props: {
    title: String,
    body: String,
    postId: Number,
  },
  components: {
    Comment,
  },
  data() {
    return {
      comments: [
        {
          name: "comment name",
          email: "comment email",
          body: "comment body",
          postId: 1,
          id: 1,
        },
      ],
    };
  },
  methods: {
    async getPostData() {
      const url = `https://jsonplaceholder.typicode.com/comments`;
      const response = await axios.get(url);
      const data = await response.data;
      this.comments = data.map((comment) => ({
        name: comment.name,
        email: comment.email,
        body: comment.body,
        postId: comment.postId,
        id: comment.id,
      }));
    },
    mounted() {
      this.getPostData();
    },
  },
};
</script>

Comment component:

<template>
  <div class="comment">
    <h4>{{ name }}</h4>
    <h5>{{ email }}</h5>
    <p>{{ body }}</p>
  </div>
</template>

<script>
export default {
  name: "Comment",
  props: {
    name: String,
    email: String,
    body: String,
  },
  data() {
    return {};
  },
};
</script>

Despite manual insertion of placeholder data into the comments array, the comments display correctly. It appears that either the mount() or getPostData() methods are not functioning as expected. I'm unable to identify the root cause despite my efforts. Any suggestions or insights would be greatly appreciated.

Answer №1

Your mounted lifecycle hook is currently within the methods object. You should move it outside like this:

<template>
  <div class="blog-post">
    <h2>{{ title }}</h2>
    <p>{{ body }}</p>
    <div class="comment-section">
      <Comment
        v-for="comment in comments"
        v-bind:key="comment.id"
        :name="comment.name"
        :email="comment.email"
        :body="comment.body"
      />
    </div>
  </div>
</template>

<script>
import axios from "axios";
import Comment from "./Comment";

export default {
  name: "Post",
  props: {
    title: String,
    body: String,
    postId: Number,
  },
  components: {
    Comment,
  },
  data() {
    return {
      comments: [
        {
          name: "comment name",
          email: "comment email",
          body: "comment body",
          postId: 1,
          id: 1,
        },
      ],
    };
  },
  methods: {
    async getPostData() {
      const url = `https://jsonplaceholder.typicode.com/comments`;
      const response = await axios.get(url);
      const data = await response.data;
      this.comments = data.map((comment) => ({
        name: comment.name,
        email: comment.email,
        body: comment.body,
        postId: comment.postId,
        id: comment.id,
      }));
    },
  },
};

// Ensure that the following code executes after the component has been mounted to the DOM.
mounted() {
  this.getPostData();
}
</script>

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