如何在Vue 2中设置组件非反应数据? [英] How to set a component non-reactive data in Vue 2?
问题描述
我有一个categorys数组,它被加载一次(在创建的钩子中),然后一直是静态的。我将此数组值呈现在组件模板中。
I have a categories array, which is loaded once (in created hook) and then it is static all the time. I render this array values in a component template.
<template>
<ul>
<li v-for="item in myArray">{{ item }}</li>
</ul>
</template>
我的数据属性看起来(它不包括myArray-我不想要反应性绑定):
My data property looks (it does not include myArray - I dont want reactive binding):
data() {
return {
someReactiveData: [1, 2, 3]
};
}
我的创建钩子:
created() {
// ...
this.myArray = ["value 1", "value 2"];
// ...
}
问题是,Vue抛出错误-我不能在模板中使用myArray,因为在创建DOM时不会创建此变量-安装。
Problem is, that Vue throw error - I cant use myArray in a template, because this variable is not created when the DOM is created - mounted.
那么该怎么做?还是可以在哪里存储组件常量?
So how to do this? Or where can be stored component constants?
推荐答案
Vue设置 data $中的所有属性。 c $ c>设置者/获取者的选项,以使其反应。参见深度反应
Vue sets all the properties in the data
option to setters/getters to make them reactive. See Reactivity in depth
由于您希望 myArray
是静态的,因此可以将其创建为自定义选项,可以使用 vm。$ options
Since you want myArray
to be static you can create it as a custom option which can be accessed using vm.$options
export default{
data() {
return{
someReactiveData: [1, 2, 3]
}
},
//custom option name myArray
myArray: null,
created() {
//access the custom option using $options
this.$options.myArray = ["value 1", "value 2"];
}
}
您可以迭代模板中的此自定义选项,如下所示:
you can iterate over this custom options in your template as follows:
<template>
<ul>
<li v-for="item in $options.myArray">{{ item }}</li>
</ul>
</template>
这是小提琴
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