我有三个带有值的v-switch
。它们每个都绑定到switch1
属性。
当我单击v-switch
时,将删除/添加值到switch1
。v-switch
强制性怎么做?这意味着无法取消所有选择。必须至少选择一个。
我认为某些事件,例如switch1将为空数组,然后取消开关单击。
我尝试通过change事件来做到这一点,但我e
是布尔值而不是事件。
new Vue({
el: '#app',
vuetify: new Vuetify(),
data () {
return {
switch1: ['val1', 'val2', 'val3'],
change: (e) => { console.log({ e })}
}
},
})
<link href="https://fonts.googleapis.com/css?family=Roboto:100,300,400,500,700,900" rel="stylesheet"/>
<link href="https://cdn.jsdelivr.net/npm/@mdi/[email protected]/css/materialdesignicons.min.css" rel="stylesheet"/>
<link href="https://fonts.googleapis.com/css?family=Material+Icons" rel="stylesheet"/>
<link href="https://cdn.jsdelivr.net/npm/[email protected]/dist/vuetify.min.css" rel="stylesheet"/>
<script src="https://cdn.jsdelivr.net/npm/babel-polyfill/dist/polyfill.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/vue.js"></script>
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/vuetify.min.js"></script>
<div id="app">
<v-app id="inspire">
<v-container class="px-0" fluid>
{{ switch1 }}
<v-switch
v-model="switch1"
label="val1"
value="val1"
@change="change($event)"
></v-switch>
<v-switch
v-model="switch1"
label="val2"
value="val2"
@change="change($event)"
></v-switch>
<v-switch
v-model="switch1"
label="val3"
value="val3"
@change="change($event)"
></v-switch>
</v-container>
</v-app>
</div>
最佳答案
我将使用观察程序,如果所有开关都不为真,则将第一个设置为true。
new Vue({
el: '#app',
vuetify: new Vuetify(),
data() {
return {
switch1: ['val1', 'val2', 'val3'],
}
},
methods: {
change: (e) => {
/*console.log({
e
})*/
}
},
watch: {
switch1(newVal, oldVal) {
if (newVal.length) {
this.switch1 = newVal
} else {
setTimeout(() => this.switch1 = oldVal)
}
}
}
})
<link href="https://fonts.googleapis.com/css?family=Roboto:100,300,400,500,700,900" rel="stylesheet" />
<link href="https://cdn.jsdelivr.net/npm/@mdi/[email protected]/css/materialdesignicons.min.css" rel="stylesheet" />
<link href="https://fonts.googleapis.com/css?family=Material+Icons" rel="stylesheet" />
<link href="https://cdn.jsdelivr.net/npm/[email protected]/dist/vuetify.min.css" rel="stylesheet" />
<script src="https://cdn.jsdelivr.net/npm/babel-polyfill/dist/polyfill.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/vue.js"></script>
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/vuetify.min.js"></script>
<div id="app">
<v-app id="inspire">
<v-container class="px-0" fluid>
{{ switch1 }}
<v-switch v-model="switch1" label="val1" value="val1" @change="change($event)"></v-switch>
<v-switch v-model="switch1" label="val2" value="val2" @change="change($event)"></v-switch>
<v-switch v-model="switch1" label="val3" value="val3" @change="change($event)"></v-switch>
</v-container>
</v-app>
</div>
另一件事是我不会在数据中放置
@change
事件-我认为最好将它们放在方法中。编辑
我更新了代码段以提供更通用的解决方案。感谢您的
setTimeout(() => this.switch1 = oldVal)
评论@JonSud!