我正在尝试使用html,css和普通javascript完全从头开始创建幻灯片,但我无法弄清楚该做什么,当我点击其中一个幻灯片指示器时,setInterval()重置其计时器(为了能够改变幻灯片没有它直接切换到下一个幻灯片,因为例如,只有1秒左右)
我试图用clearInterval()重置计时器然后重新激活setInterval(),但是当我点击其中一个幻灯片指示器时,幻灯片开始随机变化(它们不遵循SetInterval()的6000ms计时器由于某些原因)。
var slides = document.querySelectorAll(".slide");
var dots = document.querySelectorAll(".dot");
function removeClass() {
for (var i = 0; i < slides.length; i++) {
slides[i].classList.remove('active');
}
}
function removeNext() {
for (var i = 0; i < slides.length; i++) {
slides[i].classList.remove('next');
}
}
function slideshow() {
currentSlide = document.querySelector(".active");
nextSlide = currentSlide.nextElementSibling;
if (nextSlide != null) {
removeClass();
nextSlide.classList.add('next');
nextSlide.classList.add('active');
} else {
removeClass();
slides[0].classList.add('next');
slides[0].classList.add('active');
}
removeNext();
}
var slideDelay = setInterval(slideshow, 6000);
document.addEventListener("click", function(event){
if (event.target.className == "dot") {
removeClass();
var dotAttrValue = event.target.getAttribute('data-slide-to');
slides[dotAttrValue-1].classList.add('active');
clearInterval(slideDelay);
var slideDelay = setInterval(slideshow, 6000);
}
});
有两个var声明会创建两个单独的间隔。摆脱第二个,你应该好好去。
var slides = document.querySelectorAll(".slide");
var dots = document.querySelectorAll(".dot");
function removeClass() {
for (var i = 0; i < slides.length; i++) {
slides[i].classList.remove('active');
}
}
function removeNext() {
for (var i = 0; i < slides.length; i++) {
slides[i].classList.remove('next');
}
}
function slideshow() {
currentSlide = document.querySelector(".active");
nextSlide = currentSlide.nextElementSibling;
if (nextSlide != null) {
removeClass();
nextSlide.classList.add('next');
nextSlide.classList.add('active');
} else {
removeClass();
slides[0].classList.add('next');
slides[0].classList.add('active');
}
removeNext();
}
var slideDelay = setInterval(slideshow, 6000);
document.addEventListener("click", function (event) {
if (event.target.className == "dot") {
removeClass();
var dotAttrValue = event.target.getAttribute('data-slide-to');
slides[dotAttrValue - 1].classList.add('active');
clearInterval(slideDelay);
slideDelay = setInterval(slideshow, 6000);//Var removed from here.
}
});