我正在使用Vue-Router文档给出的示例
html:
<div id="app">
<h3>{{title}}</h3>
<router-link to="/">/home</router-link>
<router-link to="/foo">/foo</router-link>
<router-view></router-view>
</div>
javaScript:
const Foo = { template: '<div>foo</div>', data: {title: "Foo" }
const Bar = { template: '<div>bar</div>', data: {title: "Bar" }
是否可以在锚点外访问选定的组件数据并更新{{title}}标头?
完整的示例在这里
我有两种可能性。首先是使用this.$parent.title
直接编辑您的父数据。第二种方法是触发事件this.$parent.$emit('changeTitle', 'foo');
。
我认为最后一个更好,因为您的状态的控制始终在您的父部件中。
const Home = {
template: '<div>Home</div>',
data: {
title: "Home"
},
mounted() {
this.$parent.title = 'home'; // directly
}
}
const Foo = {
template: '<div>Foo</div>',
data: {
title: "Foo"
},
mounted() {
this.$parent.$emit('changeTitle', 'foo'); // emit an event
}
}
const router = new VueRouter({
mode: 'history',
routes: [
{
path: '/',
component: Home
},
{
path: '/foo',
component: Foo
}
]
})
new Vue({
router,
el: '#app',
data: {
title: 'Initial'
},
destroy() {
this.$off('changeTitle');
},
created() {
const _self = this;
this.$on('changeTitle', function(newTitle) {
_self.title = newTitle;
});
}
})
<script src="https://npmcdn.com/vue/dist/vue.js"></script>
<script src="https://npmcdn.com/vue-router/dist/vue-router.js"></script>
<div id="app">
<h3>{{title}}</h3>
<router-link to="/">/home</router-link>
<router-link to="/foo">/foo</router-link>
<router-view></router-view>
</div>