Home Web Front-end Vue.js The difference between event and $event in vue

The difference between event and $event in vue

May 08, 2024 pm 04:42 PM
vue form submission

In Vue.js, event is a native JavaScript event, triggered by the browser, and $event is a Vue-specific abstract event object, used in Vue components. It is generally more convenient to use $event because it is formatted and enhanced to support data binding. Use event when you need to access specific functionality of the native event object.

The difference between event and $event in vue

The difference between event and $event in Vue

In Vue.js, event and $event are two variables related to event processing. There are some key differences between them:

event

  • ##event is a native JavaScript event, Triggered by the browser.
  • It contains information about the event, such as event type, target element, and event data.
  • You can use
  • event on any element that can receive an event handler, such as

$event

    ##$event
  • is an abstract event object of Vue.js. Used to handle events in Vue components. It contains the same information as
  • event
  • , but formatted and enhanced by Vue.js.
  • $event
  • can only be used within Vue components, via the @eventName event handler or the v-on directive.
When to use

event and when to use $event? Generally, it is better to use

$event

as it provides the following advantages:

    Convenience:
  • $event is Vue.js specific, so it is more convenient to use it in Vue components.
  • Normalization: The format of
  • $event is always the same, regardless of the event type.
  • Data binding:
  • You can use event.target.value and other $event properties to perform data binding in the Vue model.
  • Use
event

only if you need to access specific functionality of the native JavaScript event object (such as the preventDefault() method).

Example

The following is an example of a Vue component using

$event

to handle button click events: <div class="code" style="position:relative; padding:0px; margin:0px;"><pre class='brush:php;toolbar:false;'>&lt;template&gt; &lt;button @click=&quot;handleClick&quot;&gt;Click Me&lt;/button&gt; &lt;/template&gt; &lt;script&gt; export default { methods: { handleClick(event) { console.log('Button clicked!', event.target.value); } } } &lt;/script&gt;</pre><div class="contentsignin">Copy after login</div></div>The following Here is an example of using

event

to prevent a form submission event: <div class="code" style="position:relative; padding:0px; margin:0px;"><pre class='brush:php;toolbar:false;'>&lt;template&gt; &lt;form @submit=&quot;handleSubmit&quot;&gt; &lt;input type=&quot;text&quot; v-model=&quot;message&quot;&gt; &lt;button type=&quot;submit&quot;&gt;Submit&lt;/button&gt; &lt;/form&gt; &lt;/template&gt; &lt;script&gt; export default { data() { return { message: '' }; }, methods: { handleSubmit(event) { event.preventDefault(); if (this.message) { alert('Message submitted: ' + this.message); } } } } &lt;/script&gt;</pre><div class="contentsignin">Copy after login</div></div>

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