[英]Render Vue.js elements
我有一個問題。 在服務器中我有技術,在我的 html 文件中我想呈現它們:
<div
v-for="(technology, index) in technologies"
:key="technology.id"
>
technology-card
v-if="index < currentlyTechnologies"
:technology="technology"
/>
</div>
<button
type="button"
@click="onToggleButtonClick"
>
{{ toggleButtonText }}
</button>
在我的 Vue.js 代碼中,我接下來要做的是:
data () {
return {
currentlyTechnologies: 6
}
},
computed: {
toggleButtonText (): string {
return this.currentlyTechnologies === this.technologies.length ? 'Show less' : 'Show more'
}
},
methods: {
onToggleButtonClick () {
const limitTechnologies = 6
this.currentlyTechnologies = this.currentlyTechnologies === limitTechnologies ? this.technologies.length : limitTechnologies
}
}
但在 DOM 中,我擁有所有 18 個元素。 我怎樣才能只繪制那些在頁面上可見的元素? 謝謝!
如果我正確理解你想要什么。 我為技術創建計算屬性並在單擊時更改 amoutOfTechnologiesToDisplay。
<div
v-for="(technology, index) in technologies"
:key="technology.id"
>
<technology-card
:technology="technology"
/>
</div>
<button
type="button"
@click="onToggleButtonClick"
>
{{ toggleButtonText }}
</button>
和你的.vue 文件
data () {
return {
amoutOfTechnologiesToDisplay: 6,
technologiesFromServer: [
// arr of obj {}, {}, {}....
]
}
},
computed: {
toggleButtonText (): string {
return this.currentlyTechnologies === this.technologies.length ? 'Show less' : 'Show more'
},
technologies(): array {
return technologiesFromServer.slice(0, this.amoutOfTechnologiesToDisplay);
}
},
methods: {
onToggleButtonClick (): void {
const limitTechnologies = 6;
this.amoutOfTechnologiesToDisplay = this.amoutOfTechnologiesToDisplay < this.technologiesFromServer.length ? this.technologiesFromServer.length : limitTechonogies;
}
}
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.