EventEmit removes the defined method in vue

Two methods to remove event listeners in Vue: use the v-on directive: first add the listener, and then use the v-on or @ directive to set its value to null to remove it. Use the $off() method: remove the listener directly from the Vue instance, specifying the event name and handler function.

Two methods to remove event listeners in Vue

Method 1: Use v-on Command

Use the v-on command to dynamically add or remove event listeners.

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

To remove a listener, use the v-on shorthand form @ and set its value to null.

<code class="html"><button @click="null">按钮</button></code>

Method 2: Use $off() method

$off() method can be used from the Vue instance Remove event listener.

<code class="js">this.$off('click', this.handleClick);</code>

Among them, 'click' is the event name, this.handleClick is the event handling function.

How to choose the removal method

• If the event listener is added dynamically in the component template, use v-on Instructions are more convenient.
• If the event listener is added manually in the component instance, it is more appropriate to use the $off() method.

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