1
使用setInterval()
和clearInterval()
循環顯示4張圖像的輪播。在初始頁面加載時,函數似乎按預期工作。但是,經過幾次循環和盤旋後,聚焦在頁面外,循環開始在幾幅圖像之間加速並在另一幅圖像內保持良好。有時,它會在循環中一起跳過圖像。有時它也會自動更正並重新開始正常工作。下面是我有:setInterval()在幾個週期後加速/減速函數傳播
jQuery(document).ready(function($) {
var count = -1;
var maxCount = $('.hero-blocks .block').length;
var colors = new Array('yellow', 'blue', 'promo', 'purple');
var autopager, timer = false;
var desktop = false,
mobile = false;
function carousel() {
if(count < maxCount - 1) {
count++;
} else {
count = 0;
}
$('.hero-blocks .block.active').removeClass('active');
$('.hero-blocks .block.' + colors[count] + '').addClass('active');
};
function startAutopager() {
autopager = window.setInterval(carousel, 4000);
timer = true;
}
function stopAutopager() {
window.clearInterval(autopager);
$('.hero-blocks .block').removeClass('active');
timer = false;
}
function triggerCarousel() {
if (Modernizr.mq('only screen and (min-width: 1024px)')) {
// This stuff stops the carousel if the user goes to a different tab
if(!desktop) {
startAutopager();
window.addEventListener('focus', startAutopager);
window.addEventListener('blur', stopAutopager);
desktop = true;
mobile = false;
$('.hero-blocks .block').hover(function() {
stopAutopager();
}, function() {
startAutopager();
});
}
} else if(!mobile) {
stopAutopager();
mobile = true;
desktop = false;
}
}
triggerCarousel();
$(window).resize(function() {
triggerCarousel();
});
});
設置計時器肯定會改善這種情況(計時器並非真正用於其他任何事情)。小點實際上解釋了很多! – fish