[英](JavaScript) How to Add Prev and Next Button to Tabs?
希望大家有一个美好的一天,周末快乐!
我想问一下在我的标签中添加上一个和下一个按钮。 我已经添加了它,其中包含一些引用此https://www.w3schools.com/howto/tryit.asp?filename=tryhow_js_slideshow的 JavaScript。
我知道用轮播引用选项卡有点奇怪,但我认为原理是一样的。 但在我的代码中,我不知道如何编码。 我很抱歉,因为我对 JavaScript 非常陌生。 所以,这是我的尝试:
//Add & remove class tab, contents, & menu on click window.addEventListener('DOMContentLoaded', ()=> { let tabs = document.querySelectorAll('.tab'); let content = document.querySelectorAll('.content'); let prev = document.querySelector('.previous'); let next = document.querySelector('.next'); let firstTab = function(tabs) {tabs.classList.add('tab-active')}; let firstContent = function(content) {content.classList.add('content-active')}; firstTab(tabs[0]); firstContent(content[0]); for (let i = 0; i < tabs.length; i++) { tabs[i].addEventListener('click', () => tabClick(i)); } prev.addEventListener('click', (i) => tabClick(i - 1)); next.addEventListener('click', (i) => tabClick(i + 1)); function tabClick(currentTab) { removeActive(); //Add Active Class tabs[currentTab].classList.add('tab-active'); content[currentTab].classList.add('content-active'); } function removeActive() { for (let i = 0; i < tabs.length; i++) { //Remove Active Class content[i].classList.remove('content-active'); content[i].classList.add('content-show'); setTimeout(function() { content[i].classList.remove('content-show'); },1500); tabs[i].classList.remove('tab-active'); } } })
/* WHOLE CONTAINER */ .container { width: 96vw; height: 96vh; } /* TABS */ .tabs { display: flex; height: 50px; overflow: hidden; align-items: center; justify-content: center; width: 100%; } .tab { font-size: 14px; padding: 5px 10px; cursor: pointer; letter-spacing: 2px; } #red.tab-active {background-color: rgb(245, 66, 66);} #blue.tab-active {background-color: rgb(66, 135, 245);} #yellow.tab-active {background-color: rgb(245, 215, 66);} #green.tab-active {background-color: rgb(56, 235, 98);} #cyan.tab-active {background-color: rgb(79, 247, 219);} /* TAB CONTENTS */ .contents { width: 100%; margin-top: 5px; height: 80%; } .content { width: 96%; height: 80%; display: none; padding: 0; margin: 0; border: none; position: absolute; } .content-show { display: flex; animation-name: fade-out; animation-duration: 2.5s; } @keyframes fade-out { 0% { opacity: 1; display: flex; } 99% { opacity: 0; display: flex; } 100% { opacity: 0; display: none; } } .content-active { display: flex; border: none; justify-content: center; animation-name: fade-in; animation-duration: 2.5s; } @keyframes fade-in { 0% { display: none; opacity: 0; } 1% { display: block; opacity: 0.01; } 100%{ display: block; opacity: 1; } } #red.content-active {background-color: rgb(245, 66, 66);} #blue.content-active {background-color: rgb(66, 135, 245);} #yellow.content-active {background-color: rgb(245, 215, 66);} #green.content-active {background-color: rgb(56, 235, 98);} #cyan.content-active {background-color: rgb(79, 247, 219);} /* BUTTON PREVIOUS NEXT */ .button { position: absolute; top: 49%; z-index: 4; } .previous, .next { margin: 5px 10px; letter-spacing: 2px; background-color: white; font-size: 14px; text-align: center; padding: 5px; cursor: pointer; }
<div class="container"> <div class="tabs"> <div id="red" class="tab">RED</div> <div id="blue" class="tab">BLUE</div> <div id="yellow" class="tab">YELLOW</div> <div id="green" class="tab">GREEN</div> <div id="cyan" class="tab">CYAN</div> </div> <div class="contents"> <div id="red" class="content"></div> <div id="blue" class="content"></div> <div id="yellow" class="content"></div> <div id="green" class="content"></div> <div id="cyan" class="content"></div> </div> <div class="button"> <div class="previous">PREV</div> <div class="next">NEXT</div> </div> </div>
请帮我解决这个代码家伙。 非常感谢。
您面临的唯一问题是,当您单击上一个或下一个按钮时,您在 tabClick 函数中传递了参数 i 但 i 不是索引,而是单击事件的属性。
这就是你所做的👇
prev.addEventListener('click', (i) => tabClick(i - 1));
next.addEventListener('click', (i) => tabClick(i + 1));
这里 i 代表 click 的属性和你点击的元素,所以它没有给出索引。
你宁愿做的是:
activeTab = currentTab
tabClick(actie - 1)
这是我的代码👇
//Add & remove class tab, contents, & menu on click
window.addEventListener('DOMContentLoaded', ()=> {
let tabs = document.querySelectorAll('.tab');
let content = document.querySelectorAll('.content');
let prev = document.querySelector('.previous');
let next = document.querySelector('.next');
let firstTab = function(tabs) {tabs.classList.add('tab-active')};
let firstContent = function(content) {content.classList.add('content-active')};
let actieTab = 0;
firstTab(tabs[0]);
firstContent(content[0]);
for (let i = 0; i < tabs.length; i++) {
tabs[i].addEventListener('click', () => tabClick(i));
}
prev.addEventListener('click', () => tabClick(activeTab - 1));
next.addEventListener('click', () => tabClick(activeTab + 1));
function tabClick(currentTab) {
removeActive();
//Add Active Class
tabs[currentTab].classList.add('tab-active');
content[currentTab].classList.add('content-active');
activeTab = currentTab
}
function removeActive() {
for (let i = 0; i < tabs.length; i++) {
//Remove Active Class
content[i].classList.remove('content-active');
content[i].classList.add('content-show');
setTimeout(function() {
content[i].classList.remove('content-show');
},1500);
tabs[i].classList.remove('tab-active');
}
}
})
对于数组结束后没有选择类的问题,可以这样做👇
代码示例
prev.addEventListener("click", (i) => {
if (activeTab === 0) {
activeTab = tabs.length - 1;
tabClick(activeTab);
} else {
tabClick(activeTab - 1);
}
});
next.addEventListener("click", (i) => {
if (activeTab >= tabs.length - 1) {
activeTab = 0;
tabClick(activeTab);
} else {
tabClick(activeTab + 1);
}
});
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