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[Vue.js] Difference from @event=doThis() & @event=doThis in Vuejs

I’ve encountered this error

Cannot read property ‘target’ of undefined

with an @click event while calling a method with a doThis().

But doThis worked fine

I would like to know what is the difference between

<button type=”button” @click=”doThis()” data-name=”test”>Test</button>


<button type=”button” @click=”doThis” data-name=”test”>Test</button>

with this method

methods: {
doThis(e) {

Solution :

Because the e which is the event object being handled is is undefined. You have to pass the object using global $event

<button type=”button” @click=”doThis($event)” data-name=”test”>Test</button>

Usually when you invoke the event handler manually is because you need to pass additional arguments to the function. As example

<div v-for=”v in values” :key=””>
<button type=”button” @click=”doThis($event, v)” data-name=”test”>Test</button>

Solution 2:

As I was typing this up, @Chay22 was able to help - for what it’s worth, here is an example:

[CodePen Mirror]

const vm = new Vue({
el: “#app”,
data: {
title: ‘’
methods: {
doTheNeedful(e) {
this.title = “Coming From: “ +;
<script src=”"></script>

<div id=”app”>
<button @click=”doTheNeedful”>doTheNeedful</button>
<button @click=”doTheNeedful($event)”>doTheNeedful($event)</button>
<div v-if=”title”>
<p>{ title }</p>
<h3>Check console for event info</h3>