computed: mapGetters(['uid']), props: { hostProduct: { type: Array, default: function() { return []; } } },
时间: 2024-05-16 18:19:54 浏览: 12
这段代码看起来像是Vue.js的组件定义代码,其中computed属性使用了mapGetters方法来映射Vuex store中的getters方法,使得组件可以访问store中的数据。
props属性定义了组件的props,其中hostProduct是一个数组类型的props,它的默认值是一个空数组。
需要注意的是,这段代码缺少完整的上下文,无法确定它的作用和用途。
相关问题
computed:{..mapGetters([])}
This code fragment is using the mapGetters helper function from Vuex to map getters from the store to computed properties in a component.
The syntax for mapGetters is as follows:
```javascript
mapGetters(namespace?: string, map: Array<string> | Object<string>): Object
```
In this case, an empty array is passed as the second argument, which means all getters from the store will be mapped to computed properties in the component.
The resulting computed properties will have the same name as the getters in the store, and can be accessed in the component using `this.propertyName`. For example, if there is a getter in the store called `getFoo`, it can be accessed in the component as `this.getFoo`.
vue里 computed:
在Vue中,computed是一种计算属性,它可以根据已有的数据计算出新的数据。computed的值会被缓存,只有当依赖的数据发生变化时才会重新计算。下面是一个例子:
```javascript
<template>
<div>
<p>商品价格:{{ price }}</p>
<p>商品折扣价:{{ discountPrice }}</p>
</div>
</template>
<script>
export default {
data() {
return {
originalPrice: 100,
discount: 0.8
}
},
computed: {
price() {
return this.originalPrice
},
discountPrice() {
return this.originalPrice * this.discount
}
}
}
</script>
```
在上面的例子中,我们定义了两个计算属性price和discountPrice,它们分别计算商品的原价和折扣价。当originalPrice或discount发生变化时,discountPrice会重新计算。
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