I'm newbie and studying Vue.js
I create v-on:click function and element toggle class when I click the button.

I am not good at English, I think it will be fast to show the code.

```html
<button @click="bindA = !bindA">A</button>
<button @click="bindB = !bindB">B</button>

<span :class="[{ classA:bindA }, { classB:bindB }]"></span>

```

```js
data: function() {
  return {
    bindA: true, // default
    bindB: false
}

```

it's now. clicked bindA and B.

```html
// browser
<span class="classA classB"></span>

```

but I want

```html
// bindA click , remove classB
<span class="classA"></span>

// bindB click , remove classA
<span class="classB"></span>

```

It's simple in jquery, but difficult in vue.