What does created represent in vue

In Vue.js, created is a life cycle hook that is triggered after the component instance is created and is used to initialize data, initiate asynchronous requests and register event listeners. It is triggered earlier than the mounted hook and is mainly used for operations unrelated to DOM interaction.

#What does created mean in Vue?

In Vue.js, created is a life cycle hook, which is triggered at the following times:

• After the component instance is created, and Before mounted.
• It is an earlier hook and is called before any operation is done on the DOM.

created Function of hook:

created Hook is mainly used to perform the following operations:

• Initialization data.
• Initiate an asynchronous request.
• Register event listener.
• Perform any other operations not related to component state.

Why use created hook?

Advantages of using created hooks include:

• Data initialization: It is an ideal place to initialize data because At this point the component instance has been created but has not yet interacted with the DOM.
• Asynchronous operations: You can use the created hook to initiate asynchronous requests, such as getting data from the server.
• Event listener: Event listeners can be registered to listen for events in the early stages of the component life cycle.

created The difference between hooks and other life cycle hooks:

• created than mounted The hook fires earlier.
• created is mainly used to perform operations unrelated to DOM interaction, while mounted is used to perform operations related to DOM interaction.
• created is triggered later than the beforeMount hook.

Example:

<code class="javascript">export default {
  created() {
    // 初始化数据
    this.count = 0;

    // 发起异步请求
    this.$axios.get('/api/data').then(response => {
      this.data = response.data;
    });

    // 注册事件监听器
    this.$el.addEventListener('click', this.handleClick);
  },
  methods: {
    handleClick() {
      // 处理点击事件
    }
  }
};</code>

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