我的Stencil.js组件有问题。我想用两个按钮制作一个图像滑块。单击第一个按钮时,img的索引为-1。单击第二个按钮时,它变为+1。我尝试使用clickHandler更改CSS。 img的当前显示设置为“无”。如果我单击它,应更改为阻止或类似的内容。但它说“找不到样式”。 我想念某事吗?
JS代码:
import { Component, Prop, h } from '@stencil/core';
@Component({
tag: 'outfitslider-nicole',
styleUrl: 'outfitslider-nicole.css',
shadow: true
})
export class AppOutfitvorschläge {
@Prop() Kategorie1: string;
@Prop() Kategorie2: string;
@Prop() Kategorie3: string;
@Prop() Infotext: string;
handleClick(event: UIEvent) {
var imgIndex: number = 1;
function vorIndex(n: number){
showingThis(imgIndex += n);
}
function showingThis(n: number){
var i: number;
var sectors = document.getElementsByClassName("outfit1");
//beginnt wieder von vorne
if (n > sectors.length){
imgIndex = 1;
}
//nimmt Länge an
else if (n < 1){
imgIndex = sectors.length;
}
for(i = 0, i < sectors.length, i++){
sectors[i].style.display = "none";
}
sectors[imgIndex-1].style.display = "block";
}
}
render() {
return (
<div class="outfitslider">
<button id="zurück" onClick={ (event: UIEvent) => this.handleClick(event)}>«</button>
<div class="slider-content">
<ul>
<li class="outift1">
<div class="inner-content">
<div class="right-content">
<h4 class="title">{this.Kategorie1}</h4>
<p>{this.Infotext}</p>
</div>
<div class="left-content">
<div class='img'><img src="/assets/L/outfit3.png"></img></div>
</div>
</div>
</li>
<li class="outift1">
<div class="inner-content">
<div class="right-content">
<h4 class="title">{this.Kategorie2}</h4>
<p>{this.Infotext}</p>
</div>
<div class="left-content">
<div class='img'></div>
</div>
</div>
</li>
<li class="outift1">
<div class="inner-content">
<div class="right-content">
<h4 class="title">{this.Kategorie3}</h4>
<p>{this.Infotext}</p>
</div>
<div class="left-content">
<div class='img'></div>
</div>
</div>
</li>
</ul>
</div>
<button id="weiter">»</button>
</div>
);
}
}
还有我的CSS:
.inner-content{
align-items: center;
align-self: center;
max-height: 500px;
overflow: hidden;
}
.slider-content ul li{
list-style: none;
display: none;
}
.title{
font-size: 15pt;
}
.left-content{
display: inline-block;
width: 25%;
position: relative;
text-align: left;
padding: 5px 10px 10px 10px;
align-self: center;
margin: 10px 0 10px 0;
bottom: -50px;
overflow: hidden;
}
.img{
background-color: grey;
height: 300px;
width: 300px;
max-width: 300px;
max-height: 300px;
align-self: center;
}
.img img{
height: 300px;
width: 300px;
max-width: 300px;
max-height: 300px;
align-self: center;
}
.right-content{
background: whitesmoke;
display: inline-block;
max-width: 25%;
position: relative;
text-align: left;
padding: 10px;
align-self: center;
margin: 10px 0 10px 0;
}
#weiter {
max-width: 50px;
padding: 8px 16px;
background-color: #BBD6FF;
color: white;
font-weight: bold;
position: absolute;
left: 76%;
top: 50%;
border: none;
height: 40px;
}
#zurück {
max-width: 50px;
padding: 8px 16px;
background-color: #BBD6FF;
border: none;
color: white;
position: absolute;
left: 20%;
top: 50%;
font-weight: bold;
height: 40px;
}
答案 0 :(得分:2)
您正在vorIndex
方法中定义handleClick
函数,但是您永远不会调用它。每次处理程序运行时,您还将imgIndex
设置为1。您可能想将索引存储为类成员。
此外,您在document.getElementsByClassName("outfit1")
函数中使用了showingThis
,但是此选择器不起作用,因为1)模板中有错字(<li class="outift1">
)和2)由于Shadow DOM,您将无法访问组件内部的元素(毕竟,您已经在组件装饰器中设置了shadow: true
。
有几种方法可以解决此问题。要在组件内使用DOM API,可以使用@Element
装饰器来获取组件主机的引用:
@Element() host;
handleClick() {
const sectors = this.host.shadowRoot.querySelectorAll('.outfit1');
}