如何在 Vue Routes 应用程序中动态更改颜色？

Question

我正在尝试创建一个 Vue-Routes 应用程序，其中应该可以通过在两个输入字段中写入所选颜色的名称来更改 index.html 中两个 div 的颜色。这有点复杂，因为这是一个路线应用程序。我如何完成这个任务？

完成的应用程序应具有以下功能：Codepen。

index.js（路线）

import ColorPage from '../components/colorPage.js'

const routes = [
    {path: '/', component: ColorPage},
];
const router = new VueRouter({
    routes

});

var vm = new Vue({
    el: '.container',
    router,
});

ColorPage.js

const ColorPage = {
    props:
        ['bga', 'bgb'],
    data() {
        bga: {
            backgroundColor: ''
        },
        bgb: {
            backgroundColor: ''
        }
    },
    template: `
<div id="middle">
    <label id="colorLabel"><h2>'Change Colors By Typing Their Names:'</h2></label>
    </br>
    <input type="text" class="colorInput" v-on:input="bga.backgroundColor = $event.target.value" placeholder="here...">
    </br>
    <input type="text" class="colorInput"  v-on:input="bgb.backgroundColor = $event.target.value" placeholder="... and here!">
</div>
`,
};

export default ColorPage

Index.html

<body>
    <div class="container" v-bind:style="bga">

        <div class="top" v-bind:style="bgb">
            <div id="app">
                <h1 id="vueHead">Vue routing</h1>
                <h2 class="menu">
                    <router-link to="/">Color</router-link>
                    <router-link to="/main">Main</router-link>
                    <router-link to="/settings">Settings</router-link>
                    <router-link to="/vue">Vue</router-link>
                </h2>
            </div>
        </div>

        <router-view></router-view>

    </div>
</body>

Answer 1

您还需要在父项中定义 bga 和 bgb

const ColorPage = {
    props:['bga','bgb'],
    template: `
<div id="middle">
    <label id="colorLabel"><h2>Change Colors By Typing Their Names:</h2></label>
    </br>
    <input type="text" class="colorInput" v-model="$parent.bga" placeholder="here...">
    </br>
    <input type="text" class="colorInput" v-model="$parent.bgb" placeholder="... and here!">
</div>
`
};

const routes = [
    {path: '/', component: ColorPage}
];
const router = new VueRouter({
    routes

});

var vm = new Vue({
    el: '.container',
    router,
    data:{
        bga:'',
        bgb:''
    }
});

<script type="text/javascript" src="https://unpkg.com/vue@2.5.16/dist/vue.js"></script>
<script type="text/javascript" src="https://unpkg.com/vue-router@2.7.0/dist/vue-router.js"></script>
<div class="container">
<div v-bind:style="bga">

        <div class="top" v-bind:style="'background-color:'+bga+';'">
            <div id="app">
                <h1 id="vueHead" v-bind:style="'color:'+bgb+';'">Vue routing</h1>
                <h2 class="menu">
                    <router-link to="/">Color</router-link>
                    <router-link to="/main">Main</router-link>
                    <router-link to="/settings">Settings</router-link>
                    <router-link to="/vue">Vue</router-link>
                </h2>
            </div>
        </div>

        <router-view></router-view>

    </div>
    
   </div>

另一种方法是 $parent

const ColorPage = {
    data:function(){
      return {
          bga: this.$parent.bga,
          bgb: this.$parent.bgb,
        }
    },
    methods:{
      changeBgaColor:function(){
        this.$parent.bga = this.bga;
      },
      changeBgbColor:function(){
        this.$parent.bgb = this.bgb;
      }
    },
    template: `
<div id="middle">
    <label id="colorLabel"><h2>Change Colors By Typing Their Names:</h2></label>
    </br>
    <input type="text" class="colorInput" v-on:keyup="changeBgaColor" v-model="bga" placeholder="here...">
    </br>
    <input type="text" class="colorInput" v-on:keyup="changeBgbColor" v-model="bgb" placeholder="... and here!">
</div>
`
};

const routes = [
    {path: '/', component: ColorPage}
];
const router = new VueRouter({
    routes

});

var vm = new Vue({
    el: '.container',
    router,
    data:{
        bga:'',
        bgb:''
    }
});

<script type="text/javascript" src="https://unpkg.com/vue@2.5.16/dist/vue.js"></script>
<script type="text/javascript" src="https://unpkg.com/vue-router@2.7.0/dist/vue-router.js"></script>
<div class="container">
<div v-bind:style="bga">

        <div class="top" v-bind:style="'background-color:'+bga+';'">
            <div id="app">
                <h1 id="vueHead" v-bind:style="'color:'+bgb+';'">Vue routing</h1>
                <h2 class="menu">
                    <router-link to="/">Color</router-link>
                    <router-link to="/main">Main</router-link>
                    <router-link to="/settings">Settings</router-link>
                    <router-link to="/vue">Vue</router-link>
                </h2>
            </div>
        </div>

        <router-view></router-view>

    </div>
    
   </div>

如何在 Vue Routes 应用程序中动态更改颜色？

How do I change color dynamically in a Vue Routes app?

javascript

vue.js

vue-router