如何将 vue.js 数据同步到全局 javscript 变量

发布于 2025-01-14 06:23:16 字数 1162 浏览 2 评论 0原文

我目前正在使用 two.jsvue.js 开发一个应用程序。

当我单击 3D 模型时,会触发一个函数,其中模型的单击部分的名称设置在变量 "name" 中,然后该变量应由 vue.js 渲染。

页面加载上,本例中的“name”初始HELLO被渲染。但是,当我单击模型时,vue.js 中的变量 "name" 会更新,但数据变量 "property" 不会更新。

我如何获得对此示例的反应?

JavaScript 部分

var name = "HELLO". //defined as global variable


[...]

// Handling of click event in three.js

if (intersects.length > 0) {for(i = 1; i <= 6; i++) {
   if(intersects[ 0 ].object.name == 'K' + i ) { 
       //functions for specific parts are wrapped in an object to enable function call based on variable 'i'
      foo['K_' + i]('K' + i);         
}}

var foo = {
    K_1: function(i) {
         name = "foo_ " + i;
    },

    K_2: function() {},
    ...
}

vue.js 部分:

const app = Vue.createApp ({
    data() {
        return {
            property: name // object key "property" is set to var "name"
        }
    },

template: 
    `<h1> {{ property }} </h1>`
})

app.mount('#app')

I am currently working on an application with three.js and vue.js.

When I click on the 3D model a function gets triggered where the name of the clicked part of the model is set in the variable "name" which then should be rendered by vue.js.

On pageload the inital value of "name" in this example HELLO gets rendered. But when I click on the model the variable "name" gets updated but not the data variable "property" in vue.js.

How do I get reactivity to this example ?

JavaScript Part :

var name = "HELLO". //defined as global variable


[...]

// Handling of click event in three.js

if (intersects.length > 0) {for(i = 1; i <= 6; i++) {
   if(intersects[ 0 ].object.name == 'K' + i ) { 
       //functions for specific parts are wrapped in an object to enable function call based on variable 'i'
      foo['K_' + i]('K' + i);         
}}

var foo = {
    K_1: function(i) {
         name = "foo_ " + i;
    },

    K_2: function() {},
    ...
}

vue.js Part :

const app = Vue.createApp ({
    data() {
        return {
            property: name // object key "property" is set to var "name"
        }
    },

template: 
    `<h1> {{ property }} </h1>`
})

app.mount('#app')

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评论(1

一梦浮鱼 2025-01-21 06:23:16

要触发 vue 的反应性,您必须使用 ref

const { ref, createApp  } = Vue;
var name = ref("HELLO");

var foo = {
  K_1(i) {
    name.value = "foo_ " + i;
  },
};

//the vue app:

createApp ({
  setup: () => ({ property: name })
  template: `<h1> {{ property }} </h1>`
}).mount('#app')
    

注意:您可以将多个 ref 分组到一个 reactive 对象中,以减少样板:

const { reactive, toRefs, createApp } = Vue;
const store = reactive({
  name: 'HELLO'
  someOtherProp: 'whatever',
  yetAnotherReactiveProp: null // you got the picture
})

var foo = {
  K_1(i) {
    store.name = "foo_ " + i;
    //      ☝️ no need for `.value` in `reactive`; only in `ref`
  },
  changeSomeOtherProp(val) {
    store.someOtherProp = val;
  }
}
createApp ({
  setup: () => ({ ...toRefs(store) })
  template: `<h1> {{ { name, someOtherProp, yetAnotherReactiveProp } }} </h1>`
}).mount('#app')

To trigger vue's reactivity you have to use a ref:

const { ref, createApp  } = Vue;
var name = ref("HELLO");

var foo = {
  K_1(i) {
    name.value = "foo_ " + i;
  },
};

//the vue app:

createApp ({
  setup: () => ({ property: name })
  template: `<h1> {{ property }} </h1>`
}).mount('#app')
    

Note: You can group multiple refs into one reactive object, to reduce the boilerplate:

const { reactive, toRefs, createApp } = Vue;
const store = reactive({
  name: 'HELLO'
  someOtherProp: 'whatever',
  yetAnotherReactiveProp: null // you got the picture
})

var foo = {
  K_1(i) {
    store.name = "foo_ " + i;
    //      ☝️ no need for `.value` in `reactive`; only in `ref`
  },
  changeSomeOtherProp(val) {
    store.someOtherProp = val;
  }
}
createApp ({
  setup: () => ({ ...toRefs(store) })
  template: `<h1> {{ { name, someOtherProp, yetAnotherReactiveProp } }} </h1>`
}).mount('#app')
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