<div id="app"> <br> <br> <div> <h2>计算属性</h2> <span>R:</span> <input type="range" min="0" max="255" v-model.number="r"> <span>G:</span> <input type="range" min="0" max="255" v-model.number="g"> <span>B:</span> <input type="range" min="0" max="255" v-model.number="b"> </div> <div> <h2>显示颜色</h2> <div id="div1" v-bind:style="{backgroundColor:`rgb(${r},${g},${b})`}"> {{ `rgb(${r},${g},${b})` }} </div> <button @click="getColor">点击</button> </div> </div> </template> <script> export default { name: 'app', data() { return { r:0, g:0, b:0, } }, methods: { getColor(){ console.log(`rgb(${this.r},${this.g},${this.b})`); } },更改methods方式为 computed:{ },形式
时间: 2024-04-28 19:23:02 浏览: 19
可以将methods中的getColor方法改为computed属性,例如:
computed: {
color() {
return `rgb(${this.r},${this.g},${this.b})`;
}
}
此时,div1中的style绑定可以改为:
v-bind:style="{backgroundColor: color}"
这样,当r、g、b的值发生变化时,color会自动更新,而不需要点击按钮触发getColor方法。
相关问题
<div> <h2>计算属性</h2> <span>R:</span> <input type="range" min="0" max="255" v-model-number="r"> <span>G:</span> <input type="range" min="0" max="255" v-model-number="g"> <span>B:</span> <input type="range" min="0" max="255" v-model-number="b"> </div> <div> <h2>显示颜色</h2> <div id="div1" v-bind:style="{backgroundColor:`rgb(${r},${g},${b})`}"> {{ `rgb(${r},${g},${b})` }} </div> <button @click="getColor">点击</button> </div>
这段代码中的 `v-model-number` 指令是不存在的,应该使用 `v-model` 指令来绑定数据。因此,正确的代码如下所示:
```
<div>
<h2>计算属性</h2>
<span>R:</span>
<input type="range" min="0" max="255" v-model="r">
<span>G:</span>
<input type="range" min="0" max="255" v-model="g">
<span>B:</span>
<input type="range" min="0" max="255" v-model="b">
</div>
<div>
<h2>显示颜色</h2>
<div id="div1" v-bind:style="{backgroundColor:`rgb(${r},${g},${b})`}">
{{ `rgb(${r},${g},${b})` }}
</div>
<button @click="getColor">点击</button>
</div>
```
另外,代码中没有展示该组件的 Vue 实例对象。如果您还没有创建 Vue 实例对象,请确保在代码中添加以下内容:
```
new Vue({
el: '#app',
data: {
r: 0,
g: 0,
b: 0
},
methods: {
getColor() {
// 获取颜色的逻辑
}
}
})
```
<template> <div class="container"> <div class="detail-wrap"> <img :src="imgSrc" alt=""> <div> <h1>{{ msg }}</h1> <p><span>¥</span><span>{{ price }}</span></p> <div><input type="number" v-model="num"></div> <button v-on:click="addToCart">加入购物车</button> </div> </div> </div> </template>这是GoodsDetail01,<template> <div class="container"> <div class="detail-wrap"> <img :src="imgSrc" alt=""> <div> <h1>{{ msg }}</h1> <p><span>¥</span><span>{{ price }}</span></p> <div><input type="number" v-model="num"></div> <button v-on:click="addToCart">加入购物车</button> </div> </div> </div> </template>这是GoodsDetail02,这是<template > <div class="product-wrap" > <div class="product" v-for="product in products" :key="product.id" @click="handleClick(product.id)"> <img :src="product.image" alt="" > <div> <span>{{ product.name }}</span> <h4>¥{{ product.price }}</h4> </div> <component :is="currentComponent"></component> </div> </div> </template>这是goodslist商品主页,实现goodslist点击跳转到GoodsDetail01和GoodsDetail02,请用动态组件实现跳转,写出vue.app和goodslist代码
Vue.app代码如下:
```html
<template>
<div id="app">
<router-view></router-view>
</div>
</template>
<script>
export default {
name: "App",
};
</script>
```
goodslist代码如下:
```html
<template>
<div>
<h2>商品列表</h2>
<div class="product-wrap">
<div class="product" v-for="product in products" :key="product.id" @click="handleClick(product.id)">
<img :src="product.image" alt="">
<div>
<span>{{ product.name }}</span>
<h4>¥{{ product.price }}</h4>
</div>
</div>
</div>
<component :is="currentComponent"></component>
</div>
</template>
<script>
import GoodsDetail01 from "./GoodsDetail01.vue";
import GoodsDetail02 from "./GoodsDetail02.vue";
export default {
name: "GoodsList",
components: {
GoodsDetail01,
GoodsDetail02,
},
data() {
return {
products: [
{
id: 1,
name: "商品1",
price: 100,
image: "https://via.placeholder.com/150",
},
{
id: 2,
name: "商品2",
price: 200,
image: "https://via.placeholder.com/150",
},
],
currentComponent: "",
};
},
methods: {
handleClick(id) {
if (id === 1) {
this.currentComponent = "GoodsDetail01";
} else if (id === 2) {
this.currentComponent = "GoodsDetail02";
}
},
},
};
</script>
```
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