What does @ mean in vue

In Vue.js, the "@" symbol is used to bind event listeners, allowing a component or element to perform specific actions upon user interaction. An event handler is a function that is executed in response to an event, and event modifiers can be used to modify the behavior of an event listener, such as preventing the event from bubbling or limiting input.

The @ symbol in Vue

In Vue.js, the @ symbol is a directive prefix for Bind event listener. It allows a component or element to perform a specific action upon user interaction such as click, keyboard input, or mouseover.

Usage

@ The symbol is placed immediately following the event name in a v-on directive in an HTML element or component template. For example:

<code class="html"><button v-on:click="handleClick">点击我</button></code>

In the above code, the @click directive associates the handleClick method with the click event of the button element. When the user clicks the button, the handleClick method will be called.

Event handlers

Event handlers are functions that are executed in response to an event. It is usually defined in the methods option of the component, such as:

<code class="javascript">methods: {
  handleClick() {
    // 事件处理程序代码
  }
}</code>

Event modifier

Vue.js also provides event modifiers for modifying event listening device behavior. For example:

• .stop: Prevent event bubbling
• .prevent: Prevent default event action
• .self: Only triggered when the event occurs on the element itself

For example

The button in the following code will prevent the click event from bubbling up :

<code class="html"><button v-on:click.stop="handleClick">点击我</button></code>

And the input box in the following code will prevent the user from entering characters other than letters:

<code class="html"><input v-on:keydown.self="handleKeyDown"></code>

Summary

@ in Vue.js symbol is the directive prefix used to bind event listeners. It allows a component or element to respond to user interaction and perform specific actions through event handlers. Event modifiers provide further control over the behavior of event listeners.

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