这里我的输出没有显示counter的值。这里是完整的javascript
代码。而且计数器的值也没有增加!
<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.17/vue.js"></script>
<div id="example-1">
<button v-on:click="counter += 1">Add 1</button>
<p>The button above has been clicked {{ counter }} times.</p>
</div>
<script>
var example1 = new Vue({
el: '#example-1',
data: {
counter: 0
}
})
</script>
数据必须是函数
data: () => ({
counter: 0
})
您必须返回data
值。
<div id="example-1">
<button v-on:click="counter += 1">Add 1</button>
<p>The button above has been clicked {{ counter }} times.</p>
</div>
<script>
var example1 = new Vue({
el: '#example-1',
data: data: function () {
return { // need to return things
counter: 0
}
},
})
</script>
看这里