我有几个带有属性的基于类的Vue.js组件,我想要动态呈现它们。这些组件很简单,例如下面的内容。
<template>
<b-alert :show="true">
{{$t(messageId)}}
</b-alert>
</template>
<script lang="ts">
import {Vue, Component, Prop} from "vue-property-decorator";
import i18n from "../../i18n";
@Component({
i18n
})
export default class UserErrorNotification extends Vue {
@Prop() messageId!: string
}
</script>这些组件在不同的组件中动态呈现。
<template>
<div id="notification-area">
<div v-for="(notificationComponent, index) in notifications" :key="index">
<component :is="notificationComponent"/>
</div>
</div>
</template>
<script lang="ts">
import {Component, Inject, Vue} from "vue-property-decorator";
import {BAlert} from "bootstrap-vue";
import {Notification} from "@/Notification";
import InfoNotification from "@/components/notifications/InfoNotification.vue";
@Component({
components: {
InfoNotification,
}
})
export default class NotificationArea extends Vue {
@Inject('eventBus') private eventBus!: Vue;
notifications = [] as Array<Vue>;
notificationToComponent(notification: Notification): Vue {
if (notification.type == "success") {
let notificationComponent;
/* Somehow instantiate and fill in Props */
return notificationComponent
} else {
throw new Error("Unknown Notification Type: " + notification.type)
}
}
created() {
this.eventBus.$on('notification', (notification: Notification) => {
this.notifications.push(this.notificationToComponent(notification));
})
}我知道$options提供了一个可以呈现的Options对象,但是message ( InfoNotification组件的属性)总是空的。
我已经尝试调用组件的构造函数,并将其赋值给属性,并将propsData参数传递给构造函数。两个都没有填满组件的支柱。有没有办法做到这一点?
发布于 2020-08-12 06:27:52
实际上,你从来没有在你的代码中传递道具。此外,我建议不要在脚本中构建组件数组。属性的传递也应该在你的模板中完成。
如果希望将多个道具作为一个对象传递,请使用v-bind属性,例如:
<component v-bind="propsObject" />该对象应如下所示:
{
messageId: "hello world"
}但是,正如我所说的,在脚本中构建组件并不是一种好的做法。
试试这个:
<template>
<div id="notification-area">
<div v-for="(notification, index) in notifications" :key="index">
<InfoNotification :messageId="notification.messageId"/>
</div>
</div>
</template>
<script lang="ts">
import {Component, Inject, Vue} from "vue-property-decorator";
import {BAlert} from "bootstrap-vue";
import {Notification} from "@/Notification";
import InfoNotification from "@/components/notifications/InfoNotification.vue";
@Component({
components: {
InfoNotification,
}
})
export default class NotificationArea extends Vue {
@Inject('eventBus') private eventBus!: Vue;
notifications = [] as Array<Notification>;
created() {
this.eventBus.$on('notification', (notification: Notification) => {
this.notifications.push(notification);
})
}
}
</script>我只是假设你的“通知”对象在这里有一个叫做messageId的属性。当然,您可以对此进行更改,或者只是将整个通知对象作为一个属性进行传递。
https://stackoverflow.com/questions/63360071
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