问题描述
我从http://www.lightningdesignsystem.com/components/carousel/#About-Carousel获得了此代码。它本来可以执行自动播放功能,但是它不起作用,即使圆形按钮也不起作用。我想念什么吗? 我也了解LWC轮播,但是我需要自定义一些不可能做到的事情,因此尝试了这一点。
<template>
<div class="slds-carousel">
<div class="slds-carousel__stage">
<span class="slds-carousel__autoplay">
<button class="slds-button slds-button_icon slds-button_icon-border-filled slds-button_icon-x-small" aria-pressed="true" title="Stop auto-play">
<svg class="slds-button__icon" aria-hidden="true">
<use xlink:href="/assets/icons/utility-sprite/svg/symbols.svg#pause"></use>
</svg>
<span class="slds-assistive-text">Stop auto-play</span>
</button>
</span>
<div class="slds-carousel__panels" style="transform:translateX(-0%)">
<div id="content-id-01" class="slds-carousel__panel" role="tabpanel" aria-hidden="false" aria-labelledby="indicator-id-01">
<a href="javascript:void(0);" class="slds-carousel__panel-action slds-text-link_reset" tabindex="0">
<div class="slds-carousel__image">
<img src="/assets/images/carousel/carousel-01.jpg" alt="Visit App Exchange" />
</div>
<div class="slds-carousel__content">
<h2 class="slds-carousel__content-title">Visit App Exchange</h2>
<p>Extend Salesforce with the #1 business marketplace.</p>
</div>
</a>
</div>
<div id="content-id-02" class="slds-carousel__panel" role="tabpanel" aria-hidden="true" aria-labelledby="indicator-id-02">
<a href="javascript:void(0);" class="slds-carousel__panel-action slds-text-link_reset" tabindex="-1">
<div class="slds-carousel__image">
<img src="/assets/images/carousel/carousel-02.jpg" alt="Click to Customize" />
</div>
<div class="slds-carousel__content">
<h2 class="slds-carousel__content-title">Click to Customize</h2>
<p>Use the Object Manager to add fields,build layouts,and more.</p>
</div>
</a>
</div>
<div id="content-id-03" class="slds-carousel__panel" role="tabpanel" aria-hidden="true" aria-labelledby="indicator-id-03">
<a href="javascript:void(0);" class="slds-carousel__panel-action slds-text-link_reset" tabindex="-1">
<div class="slds-carousel__image">
<img src="/assets/images/carousel/carousel-03.jpg" alt="Download SalesforceA" />
</div>
<div class="slds-carousel__content">
<h2 class="slds-carousel__content-title">Download SalesforceA</h2>
<p>Get the mobile app that's just for Salesforce admins.</p>
</div>
</a>
</div>
</div>
<ul class="slds-carousel__indicators" role="tablist">
<li class="slds-carousel__indicator" role="presentation">
<a id="indicator-id-01" class="slds-carousel__indicator-action slds-is-active" href="javascript:void(0);" role="tab" tabindex="0" aria-selected="true" aria-controls="content-id-01" title="Visit App Exchange tab">
<span class="slds-assistive-text">Visit App Exchange tab</span>
</a>
</li>
<li class="slds-carousel__indicator" role="presentation">
<a id="indicator-id-02" class="slds-carousel__indicator-action" href="javascript:void(0);" role="tab" tabindex="-1" aria-selected="false" aria-controls="content-id-02" title="Click to Customize tab">
<span class="slds-assistive-text">Click to Customize tab</span>
</a>
</li>
<li class="slds-carousel__indicator" role="presentation">
<a id="indicator-id-03" class="slds-carousel__indicator-action" href="javascript:void(0);" role="tab" tabindex="-1" aria-selected="false" aria-controls="content-id-03" title="Download SalesforceA tab">
<span class="slds-assistive-text">Download SalesforceA tab</span>
</a>
</li>
</ul>
</div>
</div>
</template>
解决方法
代码仅用于理解目的。这不包括 javascript。您必须通过以下方面将您的代码连接到 JS:
- 在“圆形按钮”的锚定标签上编写 onclick 函数,正如您所说的那样。
- 这个 JS 按钮应该调用一个方法来做以下事情:
- 通过删除所有存在的“slds-is-active”类,将所有具有“slds-carousel__indicator-action”类的标签标记为非活动状态。
- 找到被点击的元素并在类属性中添加“slds-is-active”。
- 仅对单击的元素将区域选择属性设为 true。
- 使实际面板的标签索引应为 0 以显示标签。这可以通过指标 ID 进行匹配。对于所有其他人,它应该是 -1。
- 使用公式动态分配变换样式:-100*index
这是示例:
<template>
<div style="">
<div class="slds-carousel" id="carousel-example-generic" data-ride="carousel">
<div class="slds-carousel__stage">
<span class="slds-carousel__autoplay">
<button class="slds-button slds-button_icon slds-button_icon-border-filled slds-button_icon-x-small" aria-pressed="true" title="Stop auto-play">
<svg class="slds-button__icon" aria-hidden="true">
<use xlink:href="/lightning-ui/dist/icons/utility-sprite/svg/symbols.svg#pause"></use>
</svg>
<span class="slds-assistive-text">Stop auto-play</span>
</button>
</span>
<div class="slds-carousel__panels" style={transformstyle}>
<template for:each={tableDataToDisplay} for:item='dataIndex'>
<div id={dataIndex.contentid}
key={dataIndex.index}
class="slds-carousel__panel"
role="tabpanel"
aria-hidden={dataIndex.areahidden}
aria-labelledby={dataIndex.indicatorid}>
<div
class="slds-carousel__panel-action slds-text-link_reset"
tabindex={dataIndex.tabindex}>
<div >
<!-- Any LWC which you want to show in screen -->
</div>
</div>
</div>
</template>
</div>
<ul class="slds-carousel__indicators" role="tablist">
<template for:each={tableDataToDisplay} for:item='dataIndex'>
<li data-target="#carousel-example-generic"
key={dataIndex.index}
data-slide-to={dataIndex.dataslideto}
class="slds-carousel__indicator"
role="presentation">
<div id={dataIndex.indicatorid}
class={dataIndex.liclass}
data-index={dataIndex.index}
data-ariacontrols={dataIndex.contentid}
role="tab"
aria-selected={dataIndex.areaselected}
aria-controls={dataIndex.contentid}
onclick={handleclick}
title="Visit App Exchange tab">
</div>
</li>
</template>
</ul>
</div>
</div>
</div>
</template>
in JS have this function :
选择元素(索引){
this.template.querySelectorAll(".slds-carousel__indicator-action").forEach(ele=>{
ele.classList.add('slds-is-active');
ele.classList.remove('slds-is-active');
});
this.template.querySelector(`[data-index="${index}"]`).classList.add('slds-is-active');
this.dataDisplay.forEach(ele=>{
ele.areaselected = false;
ele.tabindex = -1;
ele.areahidden = true;
if(ele.index === index){
ele.areaselected = true;
ele.tabindex = 0;
ele.areahidden = false;
}
});
this.transformstyle = `transform:translateX(-${
index * 100
}%);`
this.dataDisplay = [...this.dataDisplay];
}