[英]How can I add fade effect to this jQuery Image Swap Gallery
[英]In JavaScript, how can I add animation effect on every image in a modal gallery?
我有一個圖像庫,每個圖像都在單擊時以模態模式打開。 我想為它們中的每一個添加動畫效果,以便在單擊下一個和上一個按鈕時顯示。 我在我的 JS 代碼中添加了動畫樣式,但是它沒有按預期工作。 它僅適用於第一次點擊,而不適用於其余部分。
這是我的代碼:
var prev = document.querySelector("#prev");
var next = document.querySelector("#next");
next.addEventListener("click", nextImage);
modalImg.addEventListener("click", nextImage);
prev.addEventListener("click", previousImage);
function nextImage() {
if (currentIndex < imgArr.length - 1) {
currentIndex++;
modalImg.src = imgArr[currentIndex].style.backgroundImage
.slice(4, -1)
.replace(/"/g, "");
}
modalImg.style.animation = "fadeInLeft .4s both";
}
function previousImage() {
if (currentIndex > 0) {
currentIndex--;
modalImg.src = imgArr[currentIndex].style.backgroundImage
.slice(4, -1)
.replace(/"/g, "");
}
modalImg.style.animation = "fadeInLeft .4s both";
}
@keyframes fadeInLeft {
0% {
opacity: 0;
-webkit-transform: translateX(-20px);
-ms-transform: translateX(-20px);
transform: translateX(-20px);
}
100% {
opacity: 1;
-webkit-transform: translateX(0);
-ms-transform: translateX(0);
transform: translateX(0);
}
}
您可以通過通過屬性animationName
操作animationName
或通過定義動畫的類名操作來實現它。
查看示例
在任何情況下,您都應該在完成后刪除動畫
function onAnimationEnd(){
/*
// Options 1: Manipulate class name
this.classList.remove('fade')
*/
imgContainer.style.animationName = 'none';
}
imgContainer.addEventListener('animationend', onAnimationEnd);
您可以簡化以避免重復:
const prev = document.querySelector("#prev");
const next = document.querySelector("#next")
prev.addEventListener("click", prevImage);
next.addEventListener("click", nextImage);
modalImg.addEventListener("click", nextImage);
function animate(i) {
modalImg.src = imgArr[i].style.backgroundImage
.slice(4, -1)
.replace(/"/g, "");
modalImg.style.animationName = "fadeInLeft";
}
function nextImage() {
currentIndex = (currentIndex + 1) % imgArr.length;
animate(currentIndex)
}
function prevImage() {
currentIndex = (currentIndex + imgArr.length - 1) % imgArr.length;
animate(currentIndex)
}
或者只使用一個事件監聽器(不需要prev
和next
變量):
function animate(i) {
modalImg.src = imgArr[i].style.backgroundImage
.slice(4, -1)
.replace(/"/g, "");
modalImg.style.animationName = "fadeInLeft";
}
function showImage(elem) {
if (elem.id === "next" || elem.id === "modalImg") {
currentIndex = (currentIndex + 1) % imgArr.length;
} else if (elem.id === "prev") {
currentIndex = (currentIndex + imgArr.length - 1) % imgArr.length;
} else {
return currentIndex
}
animate(currentIndex)
}
window.addEventListener("click", function(e) {
showImage(e.target)
});
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